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Fix for BUG#7965 "Slave_IO_State Stuck at 'Checking Master Version'":

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Working around hang of master < 3.23.50 on SELECT @@unknown_var
(to enable 3.23.49->4.1.10 replication)


sql/slave.cc:
  Working around hang of master < 3.23.50 on SELECT @@unknown_var
  (to enable 3.23.49->4.1.10 replication)
This commit is contained in:
unknown 2005-01-17 21:26:14 +01:00
parent 5847d10712
commit 608729f711
1 changed files with 5 additions and 0 deletions
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5
sql/slave.cc
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@ -1243,7 +1243,11 @@ not always make sense; please check the manual before using it).";
values of these 2 are never used (new connections don't use them).
We don't test equality of global collation_database either as it's is
going to be deprecated (made read-only) in 4.1 very soon.
We don't do it for <3.23.57 because masters <3.23.50 hang on
SELECT @@unknown_var (BUG#7965 - see changelog of 3.23.50).
*/
if (mi->old_format == BINLOG_FORMAT_323_LESS_57)
goto err;
if (!mysql_real_query(mysql, "SELECT @@GLOBAL.COLLATION_SERVER", 32) &&
(master_res= mysql_store_result(mysql)))
{
@ -1280,6 +1284,7 @@ be equal for replication to work";
mysql_free_result(master_res);
}
err:
if (errmsg)
{
sql_print_error(errmsg);