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Fix to bug # 634, http://bugs.skysql.com/show_bug.cgi?id=634

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COM_SHOW_SLAVE_STAT wasn't classified but it was treated as 'unknown' and thus routed to master.
This commit is contained in:
VilhoRaatikka 2014-12-03 13:27:31 +02:00
parent 33f77303f7
commit b106560317
2 changed files with 29 additions and 26 deletions
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1
query_classifier/query_classifier.cc
View File

@ -619,6 +619,7 @@ static skygw_query_type_t resolve_query_type(
break;
case SQLCOM_SELECT:
case SQLCOM_SHOW_SLAVE_STAT:
type |= QUERY_TYPE_READ;
break;

54
server/modules/routing/readwritesplit/readwritesplit.c
View File

@ -1212,25 +1212,27 @@ static bool get_dcb(
* backend and update assign it to new candidate if
* necessary.
*/
else if (SERVER_IS_SLAVE(b->backend_server) &&
(max_rlag == MAX_RLAG_UNDEFINED ||
else if (SERVER_IS_SLAVE(b->backend_server))
{
if (max_rlag == MAX_RLAG_UNDEFINED ||
(b->backend_server->rlag != MAX_RLAG_NOT_AVAILABLE &&
b->backend_server->rlag <= max_rlag)))
{
candidate_bref = check_candidate_bref(
candidate_bref,
&backend_ref[i],
rses->rses_config.rw_slave_select_criteria);
}
else
{
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Server %s:%d is too much behind the "
"master, %d s. and can't be chosen.",
b->backend_server->name,
b->backend_server->port,
b->backend_server->rlag)));
b->backend_server->rlag <= max_rlag))
{
candidate_bref = check_candidate_bref(
candidate_bref,
&backend_ref[i],
rses->rses_config.rw_slave_select_criteria);
}
else
{
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Server %s:%d is too much behind the "
"master, %d s. and can't be chosen.",
b->backend_server->name,
b->backend_server->port,
b->backend_server->rlag)));
}
}
} /*< for */
/** Assign selected DCB's pointer value */
@ -1474,7 +1476,7 @@ static route_target_t get_route_target (
QUERY_IS_TYPE(qtype, QUERY_TYPE_UNKNOWN)));
target = TARGET_MASTER;
}
#if defined(SS_DEBUG)
#if defined(SS_EXTRA_DEBUG)
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Selected target \"%s\"",
@ -2132,14 +2134,14 @@ static int routeQuery(
rlag_max);
if (succp)
{
#if defined(SS_DEBUG)
#if defined(SS_EXTRA_DEBUG)
LOGIF(LT, (skygw_log_write(LOGFILE_TRACE,
"Found DCB for slave.")));
#endif
ss_dassert(get_bref_from_dcb(router_cli_ses, target_dcb) !=
router_cli_ses->rses_master_ref);
ss_dassert(get_root_master_bref(router_cli_ses) ==
router_cli_ses->rses_master_ref);
#endif
atomic_add(&inst->stats.n_slave, 1);
}
else
@ -2204,7 +2206,7 @@ static int routeQuery(
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Route query to %s\t%s:%d <",
"Route query to %s \t%s:%d <",
(SERVER_IS_MASTER(bref->bref_backend->backend_server) ?
"master" : "slave"),
bref->bref_backend->backend_server->name,
@ -3948,12 +3950,12 @@ static bool route_session_write(
{
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Route query to %s\t%s:%d%s",
"Route query to %s \t%s:%d%s",
(SERVER_IS_MASTER(backend_ref[i].bref_backend->backend_server) ?
"master" : "slave"),
backend_ref[i].bref_backend->backend_server->name,
backend_ref[i].bref_backend->backend_server->port,
(i+1==router_cli_ses->rses_nbackends ? " <" : ""))));
(i+1==router_cli_ses->rses_nbackends ? " <" : " "))));
}
if (BREF_IS_IN_USE((&backend_ref[i])))
@ -4003,12 +4005,12 @@ static bool route_session_write(
{
LOGIF(LT, (skygw_log_write(
LOGFILE_TRACE,
"Route query to %s\t%s:%d%s",
"Route query to %s \t%s:%d%s",
(SERVER_IS_MASTER(backend_ref[i].bref_backend->backend_server) ?
"master" : "slave"),
backend_ref[i].bref_backend->backend_server->name,
backend_ref[i].bref_backend->backend_server->port,
(i+1==router_cli_ses->rses_nbackends ? " <" : ""))));
(i+1==router_cli_ses->rses_nbackends ? " <" : " "))));
}
scur = backend_ref_get_sescmd_cursor(&backend_ref[i]);