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Additional fix to bug #676

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readwritesplit.c:route_session_write: added check that at least one backend is being used.
This commit is contained in:
VilhoRaatikka
2015-01-03 01:47:11 +02:00
parent 9be2212d96
commit 2d3491e123
1 changed files with 9 additions and 8 deletions
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17
server/modules/routing/readwritesplit/readwritesplit.c
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@ -4059,8 +4059,6 @@ return_rc:
* Suppress redundant OK packets sent by backends.
*
* The first OK packet is replied to the client.
* Return true if succeed, false is returned if router session was closed or
* if execute_sescmd_in_backend failed.
*
* @param router_cli_ses Client's router session pointer
* @param querybuf GWBUF including the query to be routed
@ -4068,7 +4066,8 @@ return_rc:
* @param packet_type Type of MySQL packet
* @param qtype Query type from query_classifier
*
* @return True if routing succeed to all backends being used, otherwise false.
* @return True if at least one backend is used and routing succeed to all
* backends being used, otherwise false.
*
*/
static bool route_session_write(
@ -4111,7 +4110,6 @@ static bool route_session_write(
/** Lock router session */
if (!rses_begin_locked_router_action(router_cli_ses))
{
succp = false;
goto return_succp;
}
@ -4147,13 +4145,16 @@ static bool route_session_write(
/** Lock router session */
if (!rses_begin_locked_router_action(router_cli_ses))
{
succp = false;
goto return_succp;
}
if (router_cli_ses->rses_nbackends <= 0)
{
succp = false;
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Router session doesn't have any backends in use. "
"Routing failed. <")));
goto return_succp;
}
/**
@ -4233,9 +4234,9 @@ static bool route_session_write(
return_succp:
/**
* Routing must succeed to all backends that are used.
* There must be at most max_nslaves+1 backends.
* There must be at leas one and at most max_nslaves+1 backends.
*/
succp = (nsucc == nbackends && nbackends <= max_nslaves+1);
succp = (nbackends > 0 && nsucc == nbackends && nbackends <= max_nslaves+1);
return succp;
}