If an attempt to get a read-lock on the WAL fails with SQLITE_BUSY_RECOVER, call the busy-handler at the btree level.

FossilOrigin-Name: ce64496509a213c08c9dedae2a7a456b393d22e5

manifest

@@ -1,8 +1,5 @@
------BEGIN PGP SIGNED MESSAGE-----
+C If\san\sattempt\sto\sget\sa\sread-lock\son\sthe\sWAL\sfails\swith\sSQLITE_BUSY_RECOVER,\scall\sthe\sbusy-handler\sat\sthe\sbtree\slevel.
-Hash: SHA1
+D 2010-06-01T14:12:45
-
-C Fix\sa\sbug\sintroduced\sby\sthe\sprevious\scheck-in\sbut\sonly\sseen\sif\nSQLITE_ENABLE_EXPENSIVE_ASSERTS\sis\sturned\son.
-D 2010-06-01T13:17:44
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in a5cad1f8f3e021356bfcc6c77dc16f6f1952bbc3
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -114,7 +111,7 @@ F src/auth.c 523da7fb4979469955d822ff9298352d6b31de34
 F src/backup.c de9809091b3b99f69e37261c133f7f8b19f6eca6
 F src/bitvec.c 06ad2c36a9c3819c0b9cbffec7b15f58d5d834e0
 F src/btmutex.c 96a12f50f7a17475155971a241d85ec5171573ff
-F src/btree.c d0414a5f09b0cacb64bd60b91c5a3720585925aa
+F src/btree.c 5934a9f5a328488cca392766bb841ff41c9083a9
 F src/btree.h dd83041eda10c17daf023257c1fc883b5f71f85a
 F src/btreeInt.h b0c87f6725b06a0aa194a6d25d54b16ce9d6e291
 F src/build.c 11100b66fb97638d2d874c1d34d8db90650bb1d7
@@ -485,7 +482,7 @@ F test/lock4.test f4f36271aa5ae1da449646bf43c7341f6b2b4c4e
 F test/lock5.test 6b1f78f09ad1522843dad571b76b321e6f439bf7
 F test/lock6.test 862aa71e97b288d6b3f92ba3313f51bd0b003776
 F test/lock7.test 64006c84c1c616657e237c7ad6532b765611cf64
-F test/lock_common.tcl bbc4e15ee5334cc4d01fcac08d7c9de7d8906e55
+F test/lock_common.tcl 69d6b67f2ba63968ec2173bcd7310c5c7eca00a2
 F test/lookaside.test 1dd350dc6dff015c47c07fcc5a727a72fc5bae02
 F test/main.test 2be2352ac77ac5b238c6337a5469aeeef57677e6
 F test/make-where7.tcl 05c16b5d4f5d6512881dfec560cb793915932ef9
@@ -774,7 +771,7 @@ F test/walfault.test f71d4c9a13d4e27086aef55f1e0e94734ffa2f6a
 F test/walhook.test 67e675127f4acb72f061a12667ce6e5460b06b78
 F test/walmode.test 6ca9d710cc9f6545b913abcded6d6b0b15641048
 F test/walslow.test d21625e2e99e11c032ce949e8a94661576548933
-F test/walthread.test 91ccfe5e04192d2c3fc252d82b28e110a81d0d2e
+F test/walthread.test a25a393c068a2b42b44333fa3fdaae9072f1617c
 F test/where.test de337a3fe0a459ec7c93db16a519657a90552330
 F test/where2.test 43d4becaf5a5df854e6c21d624a1cb84c6904554
 F test/where3.test aa44a9b29e8c9f3d7bb94a3bb3a95b31627d520d
@@ -818,14 +815,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P f039552e6330b6a04281748f985b41937f534bd0
+P 9c9ec8994bf701249efce6c7bb911de4525808c8
-R 6598ae3f99b7aa3625a351066760e43c
+R 2b521b04f3b51086c8477471cd905ca9
-U drh
+U dan
-Z 46dc844402f0088130b5572c3b57f1cf
+Z 5cf352c78c887b69611dfdbc185b73d6
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-
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-6ulVh2nHwt7VRotuY8c8O6c=
-=6tyV
------END PGP SIGNATURE-----

manifest.uuid

@@ -1 +1 @@
-9c9ec8994bf701249efce6c7bb911de4525808c8
+ce64496509a213c08c9dedae2a7a456b393d22e5

src/btree.c

@@ -2546,7 +2546,7 @@ int sqlite3BtreeBeginTrans(Btree *p, int wrflag){
     if( rc!=SQLITE_OK ){
       unlockBtreeIfUnused(pBt);
     }
-  }while( rc==SQLITE_BUSY && pBt->inTransaction==TRANS_NONE &&
+  }while( (rc&0xFF)==SQLITE_BUSY && pBt->inTransaction==TRANS_NONE &&
           btreeInvokeBusyHandler(pBt) );
 
   if( rc==SQLITE_OK ){

test/lock_common.tcl

@@ -47,7 +47,13 @@ proc testfixture {chan cmd} {
 }
 
 proc testfixture_nb_cb {varname chan} {
-  set line [gets $chan]
+  if {[eof $chan]} {
+    append ::tfnb($chan) "ERROR: Child process hung up"
+    set line "OVER"
+  } else {
+    set line [gets $chan]
+  }
+
   if { $line == "OVER" } {
     set $varname $::tfnb($chan)
     unset ::tfnb($chan)

test/walthread.test

@@ -284,6 +284,12 @@ do_thread_test2 walthread-1 -seconds $seconds(walthread-1) -init {
     }
   }
 
+  # Turn off auto-checkpoint. Otherwise, an auto-checkpoint run by a
+  # writer may cause the dedicated checkpoint thread to return an
+  # SQLITE_BUSY error.
+  #
+  db eval { PRAGMA wal_autocheckpoint = 0 }
+
   set nRun 0
   while {[tt_continue]} {
     read_transaction
@@ -389,7 +395,10 @@ do_thread_test walthread-3 -seconds $seconds(walthread-3) -init {
   set nextwrite $E(pid)
 
   proc wal_hook {zDb nEntry} {
-    if {$nEntry>10} {db eval {PRAGMA wal_checkpoint}}
+    if {$nEntry>10} { 
+      set rc [catch { db eval {PRAGMA wal_checkpoint} } msg]
+      if {$rc && $msg != "database is locked"} { error $msg }
+    }
     return 0
   }
   db wal_hook wal_hook