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Bug#47525: MySQL crashed (Federated)

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On Mac OS X or Windows, sending a SIGHUP to the server or a
asynchronous flush (triggered by flush_time), would cause the
server to crash.

The problem was that a hook used to detach client API handles
wasn't prepared to handle cases where the thread does not have
a associated session.

The solution is to verify whether the thread has a associated
session before trying to detach a handle.
This commit is contained in:
Davi Arnaut
2009-09-30 18:38:02 -03:00
parent f7ebdaef80
commit d941a1f304
5 changed files with 98 additions and 1 deletions
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20
sql/sql_parse.cc
View File

@ -2161,6 +2161,26 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
if (check_global_access(thd,RELOAD_ACL))
break;
mysql_log.write(thd,command,NullS);
#ifndef DBUG_OFF
DBUG_EXECUTE_IF("simulate_detached_thread_refresh",
{
/*
Simulate a reload without a attached thread session.
Provides a environment similar to that of when the
server receives a SIGHUP signal and reloads caches
and flushes tables.
*/
bool res;
my_pthread_setspecific_ptr(THR_THD, NULL);
res= reload_acl_and_cache(NULL, options | REFRESH_FAST,
NULL, &not_used);
my_pthread_setspecific_ptr(THR_THD, thd);
if (!res)
send_ok(thd);
break;
}
);
#endif
if (!reload_acl_and_cache(thd, options, (TABLE_LIST*) 0, &not_used))
send_ok(thd);
break;