diff --git a/CHANGES b/CHANGES
index d192021555..341e119c66 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,8 @@
                                                          -*- coding: utf-8 -*-
 Changes with Apache 2.5.0
 
+  *) Added many log numbers to log statements that had none.
+
   *) mod_http2: fixed compile issues re cc's with builtin log2n, fixed cache
      digest calculation. [Stefan Eissing]
      
diff --git a/modules/aaa/mod_auth_form.c b/modules/aaa/mod_auth_form.c
index 3a942d4310..e254710b17 100644
--- a/modules/aaa/mod_auth_form.c
+++ b/modules/aaa/mod_auth_form.c
@@ -683,7 +683,7 @@ static int get_form_auth(request_rec * r,
     /* a missing username or missing password means auth denied */
     if (!sent_user || !*sent_user) {
 
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02982)
                       "form parsed, but username field '%s' was missing or empty, unauthorized",
                       username);
 
@@ -691,7 +691,7 @@ static int get_form_auth(request_rec * r,
     }
     if (!sent_pw || !*sent_pw) {
 
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02983)
                       "form parsed, but password field '%s' was missing or empty, unauthorized",
                       password);
 
diff --git a/modules/arch/win32/mod_isapi.c b/modules/arch/win32/mod_isapi.c
index 66cc8da69e..275d0864ef 100644
--- a/modules/arch/win32/mod_isapi.c
+++ b/modules/arch/win32/mod_isapi.c
@@ -842,7 +842,7 @@ static int APR_THREAD_FUNC regfnWriteClient(isapi_cid    *cid,
         rv = ap_pass_brigade(r->output_filters, bb);
         cid->response_sent = 1;
         if (rv != APR_SUCCESS)
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, rv, r, APLOGNO(02984)
                           "WriteClient ap_pass_brigade failed: %s",
                           r->filename);
     }
@@ -1017,7 +1017,7 @@ static int APR_THREAD_FUNC regfnServerSupportFunction(isapi_cid    *cid,
                 r->args = apr_pstrdup(r->pool, (char*) buf_data);
         }
         if (cid->dconf.log_to_errlog)
-            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02985)
                           "%s: %s", cid->r->filename,
                           (char*) buf_data);
         return 1;
@@ -1187,9 +1187,9 @@ static int APR_THREAD_FUNC regfnServerSupportFunction(isapi_cid    *cid,
         int res = 0;
         if (!cid->dconf.fake_async) {
             if (cid->dconf.log_unsupported)
-                ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r,
-                            "asynchronous I/O not supported: %s",
-                            r->filename);
+                ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02986)
+                              "asynchronous I/O not supported: %s",
+                              r->filename);
             apr_set_os_error(APR_FROM_OS_ERROR(ERROR_INVALID_PARAMETER));
             return 0;
         }
diff --git a/modules/cache/mod_cache_disk.c b/modules/cache/mod_cache_disk.c
index 9e83fa81d3..52d5dba0b1 100644
--- a/modules/cache/mod_cache_disk.c
+++ b/modules/cache/mod_cache_disk.c
@@ -880,13 +880,15 @@ static apr_status_t recall_headers(cache_handle_t *h, request_rec *r)
     /* Call routine to read the header lines/status line */
     rv = read_table(h, r, h->resp_hdrs, dobj->hdrs.fd);
     if (rv != APR_SUCCESS) { 
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                     "Error reading response headers from %s for %s", dobj->hdrs.file, dobj->name);
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02987) 
+                      "Error reading response headers from %s for %s",
+                      dobj->hdrs.file, dobj->name);
     }
     rv = read_table(h, r, h->req_hdrs, dobj->hdrs.fd);
     if (rv != APR_SUCCESS) { 
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                     "Error reading request headers from %s for %s", dobj->hdrs.file, dobj->name);
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(02988) 
+                      "Error reading request headers from %s for %s",
+                      dobj->hdrs.file, dobj->name);
     }
 
     apr_file_close(dobj->hdrs.fd);
diff --git a/modules/core/mod_macro.c b/modules/core/mod_macro.c
index ec484ac966..4cd1d41256 100644
--- a/modules/core/mod_macro.c
+++ b/modules/core/mod_macro.c
@@ -115,7 +115,7 @@ static void warn_if_non_blank(const char * what,
         if (*p == '#')
             break;
         if (*p != ' ' && *p != '\t') {
-            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL,
+            ap_log_error(APLOG_MARK, APLOG_WARNING, 0, NULL, APLOGNO(02989)
                          "%s on line %d of %s: %s",
                          what, cfg->line_number, cfg->name, ptr);
             break;
diff --git a/modules/debugging/mod_firehose.c b/modules/debugging/mod_firehose.c
index a9a63303ca..d7e4ed9745 100644
--- a/modules/debugging/mod_firehose.c
+++ b/modules/debugging/mod_firehose.c
@@ -485,7 +485,8 @@ static int firehose_open_logs(apr_pool_t *p, apr_pool_t *plog,
                             | conn->nonblock, APR_OS_DEFAULT, plog))) {
                 ap_log_error(APLOG_MARK,
                         APLOG_WARNING,
-                        rv, s, "mod_firehose: could not open '%s' for write, disabling firehose %s%s %s filter",
+                        rv, s, APLOGNO(02990)
+                        "mod_firehose: could not open '%s' for write, disabling firehose %s%s %s filter",
                         conn->filename, conn->proxy == FIREHOSE_PROXY ? "proxy " : "",
                         conn->request == FIREHOSE_REQUEST ? " request" : "connection",
                         conn->direction == FIREHOSE_IN ? "input" : "output");
diff --git a/modules/examples/mod_example_hooks.c b/modules/examples/mod_example_hooks.c
index 4db0865ccc..d818dc1f73 100644
--- a/modules/examples/mod_example_hooks.c
+++ b/modules/examples/mod_example_hooks.c
@@ -328,7 +328,8 @@ static x_cfg *our_cconfig(const conn_rec *c)
 static void example_log_each(apr_pool_t *p, server_rec *s, const char *note)
 {
     if (s != NULL) {
-        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, "mod_example_hooks: %s", note);
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02991)
+                     "mod_example_hooks: %s", note);
     }
     else {
         apr_file_t *out = NULL;
diff --git a/modules/examples/mod_example_ipc.c b/modules/examples/mod_example_ipc.c
index a7cdb34d1b..9685f8fc33 100644
--- a/modules/examples/mod_example_ipc.c
+++ b/modules/examples/mod_example_ipc.c
@@ -142,7 +142,7 @@ static int exipc_post_config(apr_pool_t *pconf, apr_pool_t *plog,
      */
     rs = apr_temp_dir_get(&tempdir, pconf);
     if (APR_SUCCESS != rs) {
-        ap_log_error(APLOG_MARK, APLOG_ERR, rs, s,
+        ap_log_error(APLOG_MARK, APLOG_ERR, rs, s, APLOGNO(02992)
                      "Failed to find temporary directory");
         return HTTP_INTERNAL_SERVER_ERROR;
     }
@@ -160,7 +160,7 @@ static int exipc_post_config(apr_pool_t *pconf, apr_pool_t *plog,
     rs = apr_shm_create(&exipc_shm, sizeof(exipc_data),
                         (const char *) shmfilename, pconf);
     if (APR_SUCCESS != rs) {
-        ap_log_error(APLOG_MARK, APLOG_ERR, rs, s,
+        ap_log_error(APLOG_MARK, APLOG_ERR, rs, s, APLOGNO(02993)
                      "Failed to create shared memory segment on file %s",
                      shmfilename);
         return HTTP_INTERNAL_SERVER_ERROR;
@@ -205,7 +205,7 @@ static void exipc_child_init(apr_pool_t *p, server_rec *s)
                                      apr_global_mutex_lockfile(exipc_mutex),
                                      p);
     if (APR_SUCCESS != rs) {
-        ap_log_error(APLOG_MARK, APLOG_CRIT, rs, s,
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rs, s, APLOGNO(02994)
                      "Failed to reopen mutex %s in child",
                      exipc_mutex_type);
         /* There's really nothing else we can do here, since This
@@ -265,7 +265,7 @@ static int exipc_handler(request_rec *r)
             }
             else {
                 /* Some error, log and bail */
-                ap_log_error(APLOG_MARK, APLOG_ERR, rs, r->server,
+                ap_log_error(APLOG_MARK, APLOG_ERR, rs, r->server, APLOGNO(02995)
                              "Child %ld failed to acquire lock",
                              (long int)getpid());
                 break; /* Out of the loop without having the lock */
@@ -273,7 +273,7 @@ static int exipc_handler(request_rec *r)
         }
         else {
             /* Some other error, log and bail */
-            ap_log_error(APLOG_MARK, APLOG_ERR, rs, r->server,
+            ap_log_error(APLOG_MARK, APLOG_ERR, rs, r->server, APLOGNO(02996)
                          "Child %ld failed to try and acquire lock",
                          (long int)getpid());
             break; /* Out of the loop without having the lock */
diff --git a/modules/filters/mod_charset_lite.c b/modules/filters/mod_charset_lite.c
index e10cb6cc00..2b30050e79 100644
--- a/modules/filters/mod_charset_lite.c
+++ b/modules/filters/mod_charset_lite.c
@@ -508,7 +508,7 @@ static void log_xlate_error(ap_filter_t *f, apr_status_t rv)
     default:
         msg = APLOGNO(02198) "xlate filter - returning error";
     }
-    ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, f->r, "%s", msg);
+    ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, f->r, APLOGNO(02997) "%s", msg);
 }
 
 /* chk_filter_chain() is called once per filter instance; it tries to
diff --git a/modules/filters/mod_sed.c b/modules/filters/mod_sed.c
index 4a7e5d2fea..f788cba92e 100644
--- a/modules/filters/mod_sed.c
+++ b/modules/filters/mod_sed.c
@@ -64,7 +64,7 @@ module AP_MODULE_DECLARE_DATA sed_module;
 static apr_status_t log_sed_errf(void *data, const char *error)
 {
     request_rec *r = (request_rec *) data;
-    ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "%s", error);
+    ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02998) "%s", error);
     return APR_SUCCESS;
 }
 
diff --git a/modules/http2/h2_alt_svc.c b/modules/http2/h2_alt_svc.c
index 2ccea963c1..24a8b1f41a 100644
--- a/modules/http2/h2_alt_svc.c
+++ b/modules/http2/h2_alt_svc.c
@@ -102,7 +102,7 @@ static int h2_alt_svc_handler(request_rec *r)
             if (ma >= 0) {
                 svc_ma = apr_psprintf(r->pool, "; ma=%d", ma);
             }
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03043)
                           "h2_alt_svc: announce %s for %s:%d", 
                           (secure? "secure" : "insecure"), 
                           r->hostname, (int)r->server->port);
diff --git a/modules/http2/h2_conn.c b/modules/http2/h2_conn.c
index 3e762f162b..f2cbbda074 100644
--- a/modules/http2/h2_conn.c
+++ b/modules/http2/h2_conn.c
@@ -186,7 +186,7 @@ apr_status_t h2_conn_run(struct h2_ctx *ctx, conn_rec *c)
             c->cs->state = CONN_STATE_WRITE_COMPLETION;
         }
         if (APR_STATUS_IS_EOF(status)) {
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c, APLOGNO(03045)
                           "h2_session(%ld): process, closing conn", c->id);
             c->keepalive = AP_CONN_CLOSE;
         }
diff --git a/modules/http2/h2_conn_io.c b/modules/http2/h2_conn_io.c
index 773d7bbb4b..1ac1edc666 100644
--- a/modules/http2/h2_conn_io.c
+++ b/modules/http2/h2_conn_io.c
@@ -112,7 +112,7 @@ static apr_status_t pass_out(apr_bucket_brigade *bb, void *ctx)
     ap_update_child_status(c->sbh, SERVER_BUSY_WRITE, NULL);
     status = apr_brigade_length(bb, 0, &bblen);
     if (status == APR_SUCCESS) {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03044)
                       "h2_conn_io(%ld): pass_out brigade %ld bytes",
                       c->id, (long)bblen);
         status = ap_pass_brigade(c->output_filters, bb);
diff --git a/modules/http2/h2_filter.c b/modules/http2/h2_filter.c
index aaa3601133..9bc550004b 100644
--- a/modules/http2/h2_filter.c
+++ b/modules/http2/h2_filter.c
@@ -161,7 +161,7 @@ apr_status_t h2_filter_core_input(ap_filter_t* f,
         case APR_TIMEUP:
             break;
         default:
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, f->c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, f->c, APLOGNO(03046)
                           "h2_conn_io: error reading");
             break;
     }
diff --git a/modules/http2/h2_from_h1.c b/modules/http2/h2_from_h1.c
index f2f39f307a..e9b2fe309c 100644
--- a/modules/http2/h2_from_h1.c
+++ b/modules/http2/h2_from_h1.c
@@ -519,7 +519,7 @@ apr_status_t h2_response_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
     if (eb) {
         int st = eb->status;
         apr_brigade_cleanup(bb);
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c, APLOGNO(03047)
                       "h2_from_h1(%d): err bucket status=%d", 
                       from_h1->stream_id, st);
         ap_die(st, r);
@@ -528,7 +528,7 @@ apr_status_t h2_response_output_filter(ap_filter_t *f, apr_bucket_brigade *bb)
     
     from_h1->response = create_response(from_h1, r);
     if (from_h1->response == NULL) {
-        ap_log_cerror(APLOG_MARK, APLOG_NOTICE, 0, f->c,
+        ap_log_cerror(APLOG_MARK, APLOG_NOTICE, 0, f->c, APLOGNO(03048)
                       "h2_from_h1(%d): unable to create response", 
                       from_h1->stream_id);
         return APR_ENOMEM;
@@ -574,7 +574,7 @@ apr_status_t h2_response_trailers_filter(ap_filter_t *f, apr_bucket_brigade *bb)
                 /* FIXME: need a better test case than this.
                 apr_table_setn(r->trailers_out, "X", "1"); */
                 if (r->trailers_out && !apr_is_empty_table(r->trailers_out)) {
-                    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c,
+                    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, f->c, APLOGNO(03049)
                                   "h2_from_h1(%d): trailers filter, saving trailers",
                                   from_h1->stream_id);
                     h2_response_set_trailers(from_h1->response,
diff --git a/modules/http2/h2_h2.c b/modules/http2/h2_h2.c
index 6217c83e6f..506fc9aa79 100644
--- a/modules/http2/h2_h2.c
+++ b/modules/http2/h2_h2.c
@@ -494,14 +494,14 @@ int h2_is_acceptable_connection(conn_rec *c, int require_all)
             if (strncmp("TLS", val, 3) 
                 || !strcmp("TLSv1", val) 
                 || !strcmp("TLSv1.1", val)) {
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03050)
                           "h2_h2(%ld): tls protocol not suitable: %s", 
                           (long)c->id, val);
                 return 0;
             }
         }
         else if (require_all) {
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03051)
                           "h2_h2(%ld): tls protocol is indetermined", (long)c->id);
             return 0;
         }
@@ -512,14 +512,14 @@ int h2_is_acceptable_connection(conn_rec *c, int require_all)
         if (val && *val) {
             const char *source;
             if (cipher_is_blacklisted(val, &source)) {
-                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03052)
                               "h2_h2(%ld): tls cipher %s blacklisted by %s", 
                               (long)c->id, val, source);
                 return 0;
             }
         }
         else if (require_all) {
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03053)
                           "h2_h2(%ld): tls cipher is indetermined", (long)c->id);
             return 0;
         }
@@ -617,7 +617,7 @@ int h2_h2_process_conn(conn_rec* c)
                                     AP_MODE_SPECULATIVE, APR_BLOCK_READ, 24);
             
             if (status != APR_SUCCESS) {
-                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c,
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c, APLOGNO(03054)
                               "h2_h2, error reading 24 bytes speculative");
                 apr_brigade_destroy(temp);
                 return DECLINED;
diff --git a/modules/http2/h2_io.c b/modules/http2/h2_io.c
index 092a37c391..5a20a7ed0a 100644
--- a/modules/http2/h2_io.c
+++ b/modules/http2/h2_io.c
@@ -127,7 +127,7 @@ apr_status_t h2_io_signal_wait(h2_mplx *m, h2_io *io)
     if (io->timeout_at != 0) {
         status = apr_thread_cond_timedwait(io->timed_cond, m->lock, io->timeout_at);
         if (APR_STATUS_IS_TIMEUP(status)) {
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, m->c,  
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, m->c, APLOGNO(03055)  
                           "h2_mplx(%ld-%d): stream timeout expired: %s",
                           m->id, io->id, 
                           (io->timed_op == H2_IO_READ)? "read" : "write");
diff --git a/modules/http2/h2_mplx.c b/modules/http2/h2_mplx.c
index 4fa0f59136..a9f305bf91 100644
--- a/modules/http2/h2_mplx.c
+++ b/modules/http2/h2_mplx.c
@@ -307,7 +307,7 @@ apr_status_t h2_mplx_release_and_join(h2_mplx *m, apr_thread_cond_t *wait)
                 }
             }
         }
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, m->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, m->c, APLOGNO(03056)
                       "h2_mplx(%ld): release_join -> destroy", m->id);
         apr_thread_mutex_unlock(m->lock);
         h2_mplx_destroy(m);
diff --git a/modules/http2/h2_push.c b/modules/http2/h2_push.c
index 52f29f3d42..fa0154b564 100644
--- a/modules/http2/h2_push.c
+++ b/modules/http2/h2_push.c
@@ -676,6 +676,7 @@ apr_array_header_t *h2_push_collect_update(h2_stream *stream,
                                             cache_digest, stream->pool);
         if (status != APR_SUCCESS) {
             ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, session->c,
+                          APLOGNO(03057)
                           "h2_session(%ld): push diary set from Cache-Digest: %s", 
                           session->id, cache_digest);
         }
diff --git a/modules/http2/h2_request.c b/modules/http2/h2_request.c
index 6fafa45f1a..5ab958b26c 100644
--- a/modules/http2/h2_request.c
+++ b/modules/http2/h2_request.c
@@ -167,7 +167,7 @@ apr_status_t h2_request_rwrite(h2_request *req, request_rec *r)
 
     status = add_all_h1_header(req, r->pool, r->headers_in);
 
-    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r,
+    ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, APLOGNO(03058)
                   "h2_request(%d): rwrite %s host=%s://%s%s",
                   req->id, req->method, req->scheme, req->authority, req->path);
                   
@@ -313,13 +313,13 @@ apr_status_t h2_request_add_trailer(h2_request *req, apr_pool_t *pool,
                                     const char *value, size_t vlen)
 {
     if (!req->trailers) {
-        ap_log_perror(APLOG_MARK, APLOG_DEBUG, APR_EINVAL, pool,
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, APR_EINVAL, pool, APLOGNO(03059)
                       "h2_request(%d): unanounced trailers",
                       req->id);
         return APR_EINVAL;
     }
     if (nlen == 0 || name[0] == ':') {
-        ap_log_perror(APLOG_MARK, APLOG_DEBUG, APR_EINVAL, pool,
+        ap_log_perror(APLOG_MARK, APLOG_DEBUG, APR_EINVAL, pool, APLOGNO(03060)
                       "h2_request(%d): pseudo header in trailer",
                       req->id);
         return APR_EINVAL;
diff --git a/modules/http2/h2_response.c b/modules/http2/h2_response.c
index 3ef6f85063..01bb20b990 100644
--- a/modules/http2/h2_response.c
+++ b/modules/http2/h2_response.c
@@ -144,7 +144,8 @@ h2_response *h2_response_rcreate(int stream_id, request_rec *r,
             /* This request triggered a TLS renegotiation that is now allowed 
              * in HTTP/2. Tell the client that it should use HTTP/1.1 for this.
              */
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, response->http_status, r, 
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, response->http_status, r,
+                          APLOGNO(03061) 
                           "h2_response(%ld-%d): renegotiate forbidden, cause: %s",
                           (long)r->connection->id, stream_id, cause);
             response->rst_error = H2_ERR_HTTP_1_1_REQUIRED;
diff --git a/modules/http2/h2_session.c b/modules/http2/h2_session.c
index 34575a6b55..1b527f4e78 100644
--- a/modules/http2/h2_session.c
+++ b/modules/http2/h2_session.c
@@ -199,7 +199,7 @@ static ssize_t send_cb(nghttp2_session *ngh2,
     if (APR_STATUS_IS_EAGAIN(status)) {
         return NGHTTP2_ERR_WOULDBLOCK;
     }
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, session->c, APLOGNO(03062)
                   "h2_session: send error");
     return h2_session_status_from_apr_status(status);
 }
@@ -215,7 +215,7 @@ static int on_invalid_frame_recv_cb(nghttp2_session *ngh2,
         char buffer[256];
         
         frame_print(frame, buffer, sizeof(buffer)/sizeof(buffer[0]));
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03063)
                       "h2_session(%ld): recv unknown FRAME[%s], frames=%ld/%ld (r/s)",
                       session->id, buffer, (long)session->frames_received,
                      (long)session->frames_sent);
@@ -240,7 +240,7 @@ static int on_data_chunk_recv_cb(nghttp2_session *ngh2, uint8_t flags,
     
     stream = h2_session_get_stream(session, stream_id);
     if (!stream) {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03064)
                       "h2_stream(%ld-%d): on_data_chunk for unknown stream",
                       session->id, (int)stream_id);
         rv = nghttp2_submit_rst_stream(ngh2, NGHTTP2_FLAG_NONE, stream_id,
@@ -279,7 +279,7 @@ static apr_status_t stream_release(h2_session *session,
         }
     }
     else {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03065)
                       "h2_stream(%ld-%d): closing with err=%d %s", 
                       session->id, (int)stream->id, (int)error_code,
                       h2_h2_err_description(error_code));
@@ -376,7 +376,7 @@ static int on_frame_recv_cb(nghttp2_session *ng2s,
         char buffer[256];
         
         frame_print(frame, buffer, sizeof(buffer)/sizeof(buffer[0]));
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03066)
                       "h2_session(%ld): recv FRAME[%s], frames=%ld/%ld (r/s)",
                       session->id, buffer, (long)session->frames_received,
                      (long)session->frames_sent);
@@ -445,7 +445,7 @@ static int on_frame_recv_cb(nghttp2_session *ng2s,
                           frame->window_update.window_size_increment);
             break;
         case NGHTTP2_RST_STREAM:
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03067)
                           "h2_session(%ld-%d): RST_STREAM by client, errror=%d",
                           session->id, (int)frame->hd.stream_id,
                           (int)frame->rst_stream.error_code);
@@ -606,7 +606,7 @@ static int on_frame_send_cb(nghttp2_session *ngh2,
         char buffer[256];
         
         frame_print(frame, buffer, sizeof(buffer)/sizeof(buffer[0]));
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03068)
                       "h2_session(%ld): sent FRAME[%s], frames=%ld/%ld (r/s)",
                       session->id, buffer, (long)session->frames_received,
                      (long)session->frames_sent);
@@ -702,7 +702,7 @@ static apr_status_t h2_session_shutdown(h2_session *session, int reason, const c
                           reason, (uint8_t*)err, err? strlen(err):0);
     status = nghttp2_session_send(session->ngh2);
     h2_conn_io_flush(&session->io);
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03069)
                   "session(%ld): sent GOAWAY, err=%d, msg=%s", 
                   session->id, reason, err? err : "");
     dispatch_event(session, H2_SESSION_EV_LOCAL_GOAWAY, reason, err);
@@ -955,7 +955,7 @@ static apr_status_t h2_session_start(h2_session *session, int *rv)
         if (APLOGrdebug(session->r)) {
             char buffer[128];
             h2_util_hex_dump(buffer, 128, (char*)cs, dlen);
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, session->r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, session->r, APLOGNO(03070)
                           "upgrading h2c session with HTTP2-Settings: %s -> %s (%d)",
                           s, buffer, (int)dlen);
         }
@@ -1145,7 +1145,7 @@ static ssize_t stream_data_cb(nghttp2_session *ng2s,
              */
             nread = 0;
             h2_stream_set_suspended(stream, 1);
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03071)
                           "h2_stream(%ld-%d): suspending",
                           session->id, (int)stream_id);
             return NGHTTP2_ERR_DEFERRED;
@@ -1170,7 +1170,7 @@ static ssize_t stream_data_cb(nghttp2_session *ng2s,
             int rv;
             
             nh = h2_util_ngheader_make(stream->pool, trailers);
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03072)
                           "h2_stream(%ld-%d): submit %d trailers",
                           session->id, (int)stream_id,(int) nh->nvlen);
             rv = nghttp2_submit_trailer(ng2s, stream->id, nh->nv, nh->nvlen);
@@ -1218,7 +1218,7 @@ static apr_status_t submit_response(h2_session *session, h2_stream *stream)
         provider.source.fd = stream->id;
         provider.read_callback = stream_data_cb;
         
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03073)
                       "h2_stream(%ld-%d): submit response %d",
                       session->id, stream->id, response->http_status);
         
@@ -1258,7 +1258,7 @@ static apr_status_t submit_response(h2_session *session, h2_stream *stream)
     else {
         int err = H2_STREAM_RST(stream, H2_ERR_PROTOCOL_ERROR);
         
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03074)
                       "h2_stream(%ld-%d): RST_STREAM, err=%d",
                       session->id, stream->id, err);
 
@@ -1297,14 +1297,14 @@ struct h2_stream *h2_session_push(h2_session *session, h2_stream *is,
     nid = nghttp2_submit_push_promise(session->ngh2, 0, is->id, 
                                       ngh->nv, ngh->nvlen, NULL);
     if (nid <= 0) {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03075)
                       "h2_stream(%ld-%d): submitting push promise fail: %s",
                       session->id, is->id, nghttp2_strerror(nid));
         return NULL;
     }
     ++session->pushes_promised;
     
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03076)
                   "h2_stream(%ld-%d): SERVER_PUSH %d for %s %s on %d",
                   session->id, is->id, nid,
                   push->req->method, push->req->path, is->id);
@@ -1323,7 +1323,7 @@ struct h2_stream *h2_session_push(h2_session *session, h2_stream *is,
         ++session->unsent_promises;
     }
     else {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03077)
                       "h2_stream(%ld-%d): failed to create stream obj %d",
                       session->id, is->id, nid);
     }
@@ -1718,7 +1718,7 @@ static int is_accepting_streams(h2_session *session)
 
 static void transit(h2_session *session, const char *action, h2_session_state nstate)
 {
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03078)
                   "h2_session(%ld): transit [%s] -- %s --> [%s]", session->id,
                   state_name(session->state), action, state_name(nstate));
     session->state = nstate;
@@ -1974,6 +1974,7 @@ apr_status_t h2_session_process(h2_session *session, int async)
                     ap_update_child_status(c->sbh, SERVER_BUSY_READ, NULL);
                     status = h2_session_start(session, &rv);
                     ap_log_cerror(APLOG_MARK, APLOG_DEBUG, status, c,
+                                  APLOGNO(03079)
                                   "h2_session(%ld): started on %s:%d", session->id,
                                   session->s->server_hostname,
                                   c->local_addr->port);
@@ -2100,6 +2101,7 @@ apr_status_t h2_session_process(h2_session *session, int async)
                 
             default:
                 ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_EGENERAL, c,
+                              APLOGNO(03080)
                               "h2_session(%ld): unknown state %d", session->id, session->state);
                 dispatch_event(session, H2_SESSION_EV_PROTO_ERROR, 0, NULL);
                 break;
diff --git a/modules/http2/h2_stream.c b/modules/http2/h2_stream.c
index 0a5af7eb3b..fa1ebaeacd 100644
--- a/modules/http2/h2_stream.c
+++ b/modules/http2/h2_stream.c
@@ -67,7 +67,7 @@ static int set_state(h2_stream *stream, h2_stream_state_t state)
         return 1;
     }
     
-    ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, stream->session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_WARNING, 0, stream->session->c, APLOGNO(03081)
                   "h2_stream(%ld-%d): invalid state transition from %d to %d", 
                   stream->session->id, stream->id, stream->state, state);
     return 0;
@@ -160,7 +160,7 @@ h2_stream *h2_stream_open(int id, apr_pool_t *pool, h2_session *session)
     set_state(stream, H2_STREAM_ST_OPEN);
     stream->request   = h2_request_create(id, pool, session->config);
     
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, session->c, APLOGNO(03082)
                   "h2_stream(%ld-%d): opened", session->id, stream->id);
     return stream;
 }
diff --git a/modules/http2/h2_switch.c b/modules/http2/h2_switch.c
index c08dd9e5fd..d1d4a60f5d 100644
--- a/modules/http2/h2_switch.c
+++ b/modules/http2/h2_switch.c
@@ -58,13 +58,13 @@ static int h2_protocol_propose(conn_rec *c, request_rec *r,
     if (strcmp(AP_PROTOCOL_HTTP1, ap_get_protocol(c))) {
         /* We do not know how to switch from anything else but http/1.1.
          */
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03083)
                       "protocol switch: current proto != http/1.1, declined");
         return DECLINED;
     }
     
     if (!h2_is_acceptable_connection(c, 0)) {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03084)
                       "protocol propose: connection requirements not met");
         return DECLINED;
     }
@@ -82,14 +82,14 @@ static int h2_protocol_propose(conn_rec *c, request_rec *r,
          
         p = apr_table_get(r->headers_in, "HTTP2-Settings");
         if (!p) {
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03085)
                           "upgrade without HTTP2-Settings declined");
             return DECLINED;
         }
         
         p = apr_table_get(r->headers_in, "Connection");
         if (!ap_find_token(r->pool, p, "http2-settings")) {
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03086)
                           "upgrade without HTTP2-Settings declined");
             return DECLINED;
         }
@@ -98,7 +98,7 @@ static int h2_protocol_propose(conn_rec *c, request_rec *r,
          */
         p = apr_table_get(r->headers_in, "Content-Length");
         if (p && strcmp(p, "0")) {
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03087)
                           "upgrade with content-length: %s, declined", p);
             return DECLINED;
         }
@@ -158,7 +158,7 @@ static int h2_protocol_switch(conn_rec *c, request_rec *r, server_rec *s,
             h2_ctx_server_set(ctx, r->server);
             status = h2_conn_setup(ctx, r->connection, r);
             if (status != APR_SUCCESS) {
-                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r,
+                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, status, r, APLOGNO(03088)
                               "session setup");
                 return status;
             }
diff --git a/modules/http2/mod_http2.c b/modules/http2/mod_http2.c
index a44661c923..41cde35f86 100644
--- a/modules/http2/mod_http2.c
+++ b/modules/http2/mod_http2.c
@@ -78,7 +78,7 @@ static int h2_post_config(apr_pool_t *p, apr_pool_t *plog,
     
     apr_pool_userdata_get(&data, mod_h2_init_key, s->process->pool);
     if ( data == NULL ) {
-        ap_log_error( APLOG_MARK, APLOG_DEBUG, 0, s,
+        ap_log_error( APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03089)
                      "initializing post config dry run");
         apr_pool_userdata_set((const void *)1, mod_h2_init_key,
                               apr_pool_cleanup_null, s->process->pool);
@@ -86,7 +86,7 @@ static int h2_post_config(apr_pool_t *p, apr_pool_t *plog,
     }
     
     ngh2 = nghttp2_version(0);
-    ap_log_error( APLOG_MARK, APLOG_INFO, 0, s,
+    ap_log_error( APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(03090)
                  "mod_http2 (v%s, nghttp2 %s), initializing...",
                  MOD_HTTP2_VERSION, ngh2? ngh2->version_str : "unknown");
     
@@ -100,7 +100,7 @@ static int h2_post_config(apr_pool_t *p, apr_pool_t *plog,
             break;
         case H2_MPM_UNKNOWN:
             /* ??? */
-            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03091)
                          "post_config: mpm type unknown");
             break;
     }
diff --git a/modules/loggers/mod_log_debug.c b/modules/loggers/mod_log_debug.c
index 9111b11965..45ba6edc9f 100644
--- a/modules/loggers/mod_log_debug.c
+++ b/modules/loggers/mod_log_debug.c
@@ -79,11 +79,13 @@ static void do_debug_log(request_rec *r, const char *hookname)
             ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00641)
                           "Can't evaluate message expression: %s", err);
         if (APLOGrdebug(r))
-            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "%s (%s hook, %s:%d)",
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(02999)
+                           "%s (%s hook, %s:%d)",
                            msg, hookname, entry->msg_expr->filename,
                            entry->msg_expr->line_number);
         else
-            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "%s", msg);
+            ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03000)
+                          "%s", msg);
     }
 }
 
diff --git a/modules/lua/lua_request.c b/modules/lua/lua_request.c
index 0ffeca049a..bf66fc4110 100644
--- a/modules/lua/lua_request.c
+++ b/modules/lua/lua_request.c
@@ -56,52 +56,53 @@ void ap_lua_rstack_dump(lua_State *L, request_rec *r, const char *msg)
         int t = lua_type(L, i);
         switch (t) {
         case LUA_TSTRING:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03001)
                               "%d:  '%s'", i, lua_tostring(L, i));
                 break;
             }
         case LUA_TUSERDATA:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "%d:  userdata",
-                              i);
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03002)
+                              "%d:  userdata", i);
                 break;
             }
         case LUA_TLIGHTUSERDATA:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03003)
                               "%d:  lightuserdata", i);
                 break;
             }
         case LUA_TNIL:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "%d:  NIL", i);
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03004)
+                              "%d:  NIL", i);
                 break;
             }
         case LUA_TNONE:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, "%d:  None", i);
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03005)
+                              "%d:  None", i);
                 break;
             }
         case LUA_TBOOLEAN:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
-                              "%d:  %s", i, lua_toboolean(L,
-                                                          i) ? "true" :
-                              "false");
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03006)
+                              "%d:  %s", i,
+                              lua_toboolean(L, i) ? "true" : "false");
                 break;
             }
         case LUA_TNUMBER:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03007)
                               "%d:  %g", i, lua_tonumber(L, i));
                 break;
             }
         case LUA_TTABLE:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03008)
                               "%d:  <table>", i);
                 break;
             }
         case LUA_TFUNCTION:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03009)
                               "%d:  <function>", i);
                 break;
             }
         default:{
-                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r,
+                ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(03010)
                               "%d:  unknown: -[%s]-", i, lua_typename(L, i));
                 break;
             }
@@ -2145,8 +2146,8 @@ static int lua_websocket_greet(lua_State *L)
     request_rec *r = ap_lua_check_request_rec(L, 1);
     key = apr_table_get(r->headers_in, "Sec-WebSocket-Key");
     if (key != NULL) {
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                    "Websocket: Got websocket key: %s", key);
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03011) 
+                      "Websocket: Got websocket key: %s", key);
         key = apr_pstrcat(r->pool, key, "258EAFA5-E914-47DA-95CA-C5AB0DC85B11", 
                 NULL);
         apr_sha1_init(&sha1);
@@ -2168,7 +2169,7 @@ static int lua_websocket_greet(lua_State *L)
             r->bytes_sent = 0;
             r->read_chunked = 0;
             ap_rflush(r);
-            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03012) 
                           "Websocket: Upgraded from HTTP to Websocket");
             lua_pushboolean(L, 1);
             return 1;
@@ -2404,8 +2405,8 @@ static int lua_websocket_write(lua_State *L)
     string = lua_tolstring(L, 2, &len);
     
     if (raw != 1) {
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                        "Websocket: Writing framed message to client");
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03013) 
+                      "Websocket: Writing framed message to client");
         
         prelude = 0x81; /* text frame, FIN */
         ap_rputc(prelude, r);
@@ -2426,8 +2427,8 @@ static int lua_websocket_write(lua_State *L)
         }
     }
     else {
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                        "Websocket: Writing raw message to client");
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03014) 
+                      "Websocket: Writing raw message to client");
     }
     ap_rwrite(string, len, r);
     rv = ap_rflush(r);
@@ -2486,8 +2487,8 @@ static int lua_websocket_ping(lua_State *L)
         unsigned char mask = len >> 7;
         if (mask) len -= 128;
         plen = len;
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
-                        "Websocket: Got PONG opcode: %x", opcode);
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03015) 
+                      "Websocket: Got PONG opcode: %x", opcode);
         if (opcode == 0x8A) {
             lua_pushboolean(L, 1);
         }
@@ -2496,7 +2497,7 @@ static int lua_websocket_ping(lua_State *L)
         }
         if (plen > 0) {
             ap_log_rerror(APLOG_MARK, APLOG_TRACE1, 0, r, 
-                        "Websocket: Reading %" APR_SIZE_T_FMT " bytes of PONG", plen);
+                          "Websocket: Reading %" APR_SIZE_T_FMT " bytes of PONG", plen);
             return 1;
         }
         if (mask) {
diff --git a/modules/lua/lua_vmprep.c b/modules/lua/lua_vmprep.c
index 6cfb31658f..311fab8128 100644
--- a/modules/lua/lua_vmprep.c
+++ b/modules/lua/lua_vmprep.c
@@ -49,7 +49,7 @@ void ap_lua_init_mutex(apr_pool_t *pool, server_rec *s)
                                      apr_global_mutex_lockfile(lua_ivm_mutex),
                                      pool);
     if (rv != APR_SUCCESS) {
-        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s,
+        ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(03016)
                      "mod_lua: Failed to reopen mutex lua-ivm-shm in child");
         exit(1); /* bah :( */
     }
diff --git a/modules/lua/mod_lua.c b/modules/lua/mod_lua.c
index 142dc5c15f..6eede233c6 100644
--- a/modules/lua/mod_lua.c
+++ b/modules/lua/mod_lua.c
@@ -726,7 +726,8 @@ static int lua_request_rec_hook_harness(request_rec *r, const char *name, int ap
                               hook_spec->file_name, hook_spec->function_name, name, rc);
             }
             else { 
-                ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, "Lua hook %s:%s for phase %s did not return a numeric value", 
+                ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(03017)
+                              "Lua hook %s:%s for phase %s did not return a numeric value",
                               hook_spec->file_name, hook_spec->function_name, name);
                 return HTTP_INTERNAL_SERVER_ERROR;
             }
diff --git a/modules/proxy/mod_proxy.c b/modules/proxy/mod_proxy.c
index 816ab4caaa..4247aba593 100644
--- a/modules/proxy/mod_proxy.c
+++ b/modules/proxy/mod_proxy.c
@@ -1967,23 +1967,23 @@ static const char *
 
         if (ap_proxy_is_ipaddr(New, parms->pool)) {
 #if DEBUGGING
-            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03018)
                          "Parsed addr %s", inet_ntoa(New->addr));
-            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03019)
                          "Parsed mask %s", inet_ntoa(New->mask));
 #endif
         }
         else if (ap_proxy_is_domainname(New, parms->pool)) {
             ap_str_tolower(New->name);
 #if DEBUGGING
-            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03020)
                          "Parsed domain %s", New->name);
 #endif
         }
         else if (ap_proxy_is_hostname(New, parms->pool)) {
             ap_str_tolower(New->name);
 #if DEBUGGING
-            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,
+            ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(03021)
                          "Parsed host %s", New->name);
 #endif
         }
diff --git a/modules/ssl/mod_ssl_ct.c b/modules/ssl/mod_ssl_ct.c
index 2236826ab6..5126de71b4 100644
--- a/modules/ssl/mod_ssl_ct.c
+++ b/modules/ssl/mod_ssl_ct.c
@@ -348,7 +348,7 @@ static apr_status_t collate_scts(server_rec *s, apr_pool_t *p,
 
         cur_sct_file = elts[i];
 
-        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03022)
                      "Adding SCT from file %s", cur_sct_file);
 
         rv = ctutil_read_file(p, s, cur_sct_file, MAX_SCTS_SIZE, &scts,
@@ -540,16 +540,13 @@ static apr_status_t fetch_sct(server_rec *s, apr_pool_t *p,
 
     rv = apr_stat(&finfo, sct_fn, APR_FINFO_MTIME, p);
     if (rv == APR_SUCCESS) {
-        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
-                     "Found SCT for %s in %s",
-                     cert_file, sct_fn);
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03023)
+                     "Found SCT for %s in %s", cert_file, sct_fn);
 
         if (finfo.mtime + max_sct_age < apr_time_now()) {
-            ap_log_error(APLOG_MARK, APLOG_INFO, 0, s,
-                         APLOGNO(02692) "SCT for %s is older than %d seconds, "
-                         "must refresh",
-                         cert_file,
-                         (int)(apr_time_sec(max_sct_age)));
+            ap_log_error(APLOG_MARK, APLOG_INFO, 0, s, APLOGNO(02692)
+                         "SCT for %s is older than %d seconds, must refresh",
+                         cert_file, (int)(apr_time_sec(max_sct_age)));
         }
         else {
             return APR_SUCCESS;
@@ -559,8 +556,8 @@ static apr_status_t fetch_sct(server_rec *s, apr_pool_t *p,
         ap_log_error(APLOG_MARK, APLOG_INFO,
                      /* no need to print error string for file-not-found err */
                      APR_STATUS_IS_ENOENT(rv) ? 0 : rv,
-                     s,
-                     APLOGNO(02693) "Did not find SCT for %s in %s, must fetch",
+                     s, APLOGNO(02693)
+                     "Did not find SCT for %s in %s, must fetch",
                      cert_file, sct_fn);
     }
 
@@ -739,7 +736,7 @@ static apr_status_t update_log_list_for_cert(server_rec *s, apr_pool_t *p,
         for (i = 0; i < arr->nelts; i++) {
             const char *cur_sct_file = elts[i];
 
-            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03024)
                          "Removing %s", cur_sct_file);
 
             rv = apr_file_remove(cur_sct_file, p);
@@ -885,7 +882,7 @@ static void sct_daemon_cycle(ct_server_config *sconf, server_rec *s_main,
     apr_status_t rv;
 
     if (sconf->db_log_config) { /* not using static config */
-        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main,
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main, APLOGNO(03025)
                      "%s - reloading config", daemon_name);
         apr_pool_clear(sconf->db_log_config_pool);
         active_log_config = NULL;
@@ -903,7 +900,7 @@ static void sct_daemon_cycle(ct_server_config *sconf, server_rec *s_main,
         }
         active_log_config = sconf->db_log_config;
     }
-    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main,
+    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main, APLOGNO(03026)
                  "%s - refreshing SCTs as needed", daemon_name);
     rv = refresh_all_scts(s_main, ptemp, active_log_config);
     if (rv != APR_SUCCESS) {
@@ -1393,8 +1390,8 @@ static int ssl_ct_check_config(apr_pool_t *pconf, apr_pool_t *plog,
                          APLOGNO(02720) "Log config file %s cannot be read",
                          sconf->log_config_fname);
             if (msg) {
-                ap_log_error(APLOG_MARK, APLOG_ERR, 0, s_main,
-                            "%s", msg);
+                ap_log_error(APLOG_MARK, APLOG_ERR, 0, s_main, APLOGNO(03027)
+                             "%s", msg);
             }
             return HTTP_INTERNAL_SERVER_ERROR;
         }
@@ -1740,7 +1737,7 @@ static apr_status_t validate_server_data(apr_pool_t *p, conn_rec *c,
             ct_sct_data sct;
             sct_fields_t fields;
 
-            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+            ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03028)
                           "%d SCTs received total", conncfg->all_scts->nelts);
 
             verification_failures = verification_successes = unknown_log_ids = 0;
@@ -1961,7 +1958,7 @@ static int ocsp_resp_cb(SSL *ssl, void *arg)
 
     br = OCSP_response_get1_basic(rsp); /* UNDOC */
     if (!br) {
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03029)
                       "no OCSP basic response");
         return 0;
     }
@@ -2079,7 +2076,7 @@ static int ssl_ct_ssl_proxy_verify(server_rec *s, conn_rec *c,
         return OK;
     }
 
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03030)
                   "ssl_ct_ssl_proxy_verify() - get server certificate info");
 
     if (chain_size < 1) {
@@ -2172,7 +2169,7 @@ static int ssl_ct_proxy_post_handshake(conn_rec *c, SSL *ssl)
         
         key = gen_key(c, conncfg->certs, conncfg);
 
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03031)
                       "key for server data: %s", key);
 
         ctutil_thread_mutex_lock(cached_server_data_mutex);
@@ -2294,7 +2291,7 @@ static int server_extension_add_callback(SSL *ssl, unsigned ext_type,
         /* Hmmm...  Is this actually called if the client doesn't include
          * the extension in the ClientHello?  I don't think so.
          */
-        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+        ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03032)
                       "server_extension_callback_2: client isn't CT-aware");
         /* Skip this extension for ServerHello */
         return -1;
@@ -2351,7 +2348,8 @@ static int ssl_ct_pre_handshake(conn_rec *c, SSL *ssl, int is_proxy)
         conncfg->client_handshake = 1;
     }
 
-    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, "client connected (pre-handshake)");
+    ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03033)
+                  "client connected (pre-handshake)");
 
     SSL_set_tlsext_status_type(ssl, TLSEXT_STATUSTYPE_ocsp); /* UNDOC */
 
@@ -2674,7 +2672,7 @@ static int ssl_ct_detach_backend(request_rec *r,
         ct_conn_config *conncfg = get_conn_config(origin);
         char *list, *last;
 
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03034)
                       "ssl_ct_detach_backend, %d%d%d",
                       conncfg->server_cert_has_sct_list,
                       conncfg->serverhello_has_sct_list,
@@ -2702,7 +2700,7 @@ static int ssl_ct_detach_backend(request_rec *r,
     }
     else {
         /* why here?  some odd error path? */
-        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, 
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(03035) 
                       "No backend connection available in ssl_ct_detach_backend()");
     }
 
diff --git a/modules/ssl/ssl_ct_log_config.c b/modules/ssl/ssl_ct_log_config.c
index 27b4d45827..86f04563e1 100644
--- a/modules/ssl/ssl_ct_log_config.c
+++ b/modules/ssl/ssl_ct_log_config.c
@@ -372,8 +372,9 @@ apr_status_t read_config_db(apr_pool_t *p, server_rec *s_main,
         const char *max_timestamp = apr_dbd_get_entry(driver, row, cur++);
         const char *url = apr_dbd_get_entry(driver, row, cur++);
 
-        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main,
-                     "Log config: Record %s, log id %s, public key file %s, distrusted %s, URL %s, time %s->%s",
+        ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s_main, APLOGNO(03036)
+                     "Log config: Record %s, log id %s, public key file %s,"
+                     " distrusted %s, URL %s, time %s->%s",
                      id,
                      log_id ? log_id : "(unset)",
                      public_key ? public_key : "(unset)",
diff --git a/modules/ssl/ssl_ct_sct.c b/modules/ssl/ssl_ct_sct.c
index 89bbb6b8ef..78065db67d 100644
--- a/modules/ssl/ssl_ct_sct.c
+++ b/modules/ssl/ssl_ct_sct.c
@@ -77,7 +77,7 @@ apr_status_t sct_verify_signature(conn_rec *c, sct_fields_t *sctf,
                               APLOGNO(02767) "verify_signature failed");
             }
             else {
-                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c,
+                ap_log_cerror(APLOG_MARK, APLOG_DEBUG, 0, c, APLOGNO(03037)
                               "verify_signature succeeded");
             }
             return rv;
@@ -266,7 +266,7 @@ apr_status_t sct_parse(const char *source,
         }
     }
 
-    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+    ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03038)
                  "SCT from %s: version %d timestamp %s hash alg %d sig alg %d",
                  source, fields->version, fields->timestr,
                  fields->hash_alg, fields->sig_alg);
diff --git a/modules/ssl/ssl_engine_init.c b/modules/ssl/ssl_engine_init.c
index 0cd2793a63..226c706a6b 100644
--- a/modules/ssl/ssl_engine_init.c
+++ b/modules/ssl/ssl_engine_init.c
@@ -1462,7 +1462,8 @@ static apr_status_t ssl_init_proxy_certs(server_rec *s,
                 int j;
                 for (j = 0; j < i; j++) {
                     ssl_log_xerror(SSLLOG_MARK, APLOG_DEBUG, 0, ptemp, s,
-                                   sk_X509_value(chain, j), "%i:", j);
+                                   sk_X509_value(chain, j), APLOGNO(03039)
+                                   "%i:", j);
                 }
             }
         }
diff --git a/modules/ssl/ssl_util_stapling.c b/modules/ssl/ssl_util_stapling.c
index 67caade31c..779c3e3b63 100644
--- a/modules/ssl/ssl_util_stapling.c
+++ b/modules/ssl/ssl_util_stapling.c
@@ -797,7 +797,7 @@ static int stapling_cb(SSL *ssl, void *arg)
             stapling_refresh_mutex_off(s);
 
             if (rv == TRUE) {
-                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s,
+                ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(03040)
                              "stapling_cb: success renewing response");
             }
             else {
diff --git a/modules/test/mod_policy.c b/modules/test/mod_policy.c
index 18c0e74a6d..775f937231 100644
--- a/modules/test/mod_policy.c
+++ b/modules/test/mod_policy.c
@@ -140,26 +140,18 @@ static void handle_policy(request_rec *r, policy_result result,
 
     switch (result) {
     case policy_log: {
-        ap_log_rerror(
-                APLOG_MARK,
-                APLOG_WARNING,
-                0,
-                r,
-                "mod_policy: violation: %s, uri: %s",
-                message, r->uri);
+        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(03041)
+                      "mod_policy: violation: %s, uri: %s",
+                      message, r->uri);
         apr_table_addn(r->headers_out, "Warning", apr_psprintf(r->pool,
                 "299 %s \"%s\"", ap_get_server_name(r), message));
         break;
     }
     case policy_enforce: {
 
-        ap_log_rerror(
-                APLOG_MARK,
-                APLOG_ERR,
-                0,
-                r,
-                "mod_policy: violation, rejecting request: %s, uri: %s",
-                message, r->uri);
+        ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(03042)
+                      "mod_policy: violation, rejecting request: %s, uri: %s",
+                      message, r->uri);
         apr_table_addn(r->err_headers_out, "Warning", apr_psprintf(r->pool,
                 "299 %s \"Rejected: %s\"", ap_get_server_name(r), message));
         apr_table_setn(r->notes, "error-notes",