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Merge branch '2.0' into develop

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This commit is contained in:
Markus Mäkelä
2016-12-22 13:40:16 +02:00
parent c7dfd1b0bd 68965639d2
commit 520d28b27d
13 changed files with 241 additions and 89 deletions
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69
server/modules/routing/readwritesplit/readwritesplit.c
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@ -1305,6 +1305,7 @@ static void handleError(ROUTER *instance, void *router_session,
if (!rses_begin_locked_router_action(rses))
{
/** Session is already closed */
problem_dcb->dcb_errhandle_called = true;
*succp = false;
return;
}
@ -1327,15 +1328,17 @@ static void handleError(ROUTER *instance, void *router_session,
}
session = problem_dcb->session;
bool close_dcb = true;
backend_ref_t *bref = get_bref_from_dcb(rses, problem_dcb);
if (session == NULL || rses == NULL)
if (session == NULL)
{
MXS_ERROR("Session of DCB %p is NULL, won't close the DCB.", problem_dcb);
ss_dassert(false);
*succp = false;
}
else if (DCB_ROLE_CLIENT_HANDLER == problem_dcb->dcb_role)
{
dcb_close(problem_dcb);
*succp = false;
}
else
@ -1383,6 +1386,9 @@ static void handleError(ROUTER *instance, void *router_session,
if (bref != NULL)
{
CHK_BACKEND_REF(bref);
RW_CHK_DCB(bref, problem_dcb);
dcb_close(problem_dcb);
RW_CLOSE_BREF(bref);
close_failed_bref(bref, true);
}
else
@ -1399,21 +1405,13 @@ static void handleError(ROUTER *instance, void *router_session,
*succp = handle_error_new_connection(inst, &rses, problem_dcb, errmsgbuf);
}
RW_CHK_DCB(bref, problem_dcb);
if (bref)
{
/** This is a valid DCB for a backend ref */
if (!BREF_IS_IN_USE(bref) || bref->bref_dcb != problem_dcb)
if (BREF_IS_IN_USE(bref) && bref->bref_dcb == problem_dcb)
{
/** The backend is closed or the reference was replaced */
dcb_close(problem_dcb);
RW_CLOSE_BREF(bref);
}
else
{
MXS_ERROR("Backend '%s' is still in use and points to the problem DCB. Not closing.",
ss_dassert(false);
MXS_ERROR("Backend '%s' is still in use and points to the problem DCB.",
bref->ref->server->unique_name);
}
}
@ -1425,29 +1423,13 @@ static void handleError(ROUTER *instance, void *router_session,
MXS_ERROR("DCB connected to '%s' is not in use by the router "
"session, not closing it. DCB is in state '%s'",
remote, STRDCBSTATE(problem_dcb->state));
MXS_ERROR("Backends currently in use:");
for (int i = 0; i < rses->rses_nbackends; i++)
{
dcb_state_t state = DCB_STATE_UNDEFINED;
if (BREF_IS_IN_USE(&rses->rses_backend_ref[i]))
{
state = rses->rses_backend_ref[i].bref_dcb->state;
}
MXS_ERROR("%p: %s - %p", &rses->rses_backend_ref[i], STRDCBSTATE(state),
rses->rses_backend_ref[i].bref_dcb);
}
}
close_dcb = false;
break;
}
case ERRACT_REPLY_CLIENT:
{
handle_error_reply_client(session, rses, problem_dcb, errmsgbuf);
close_dcb = false;
*succp = false; /*< no new backend servers were made available */
break;
}
@ -1459,12 +1441,6 @@ static void handleError(ROUTER *instance, void *router_session,
}
}
if (close_dcb)
{
RW_CHK_DCB(bref, problem_dcb);
dcb_close(problem_dcb);
RW_CLOSE_BREF(bref);
}
rses_end_locked_router_action(rses);
}
@ -1594,6 +1570,8 @@ static bool handle_error_new_connection(ROUTER_INSTANCE *inst,
/**
* If bref == NULL it has been replaced already with another one.
*
* NOTE: This can never happen.
*/
if ((bref = get_bref_from_dcb(myrses, backend_dcb)) == NULL)
{
@ -1626,25 +1604,10 @@ static bool handle_error_new_connection(ROUTER_INSTANCE *inst,
}
}
RW_CHK_DCB(bref, backend_dcb);
dcb_close(backend_dcb);
RW_CLOSE_BREF(bref);
close_failed_bref(bref, false);
/**
* Error handler is already called for this DCB because
* it's not polling anymore. It can be assumed that
* it succeed because rses isn't closed.
*/
if (backend_dcb->state != DCB_STATE_POLLING)
{
return true;
}
/**
* Remove callback because this DCB won't be used
* unless it is reconnected later, and then the callback
* is set again.
*/
dcb_remove_callback(backend_dcb, DCB_REASON_NOT_RESPONDING,
&router_handle_state_switch, (void *)bref);
max_nslaves = rses_get_max_slavecount(myrses, myrses->rses_nbackends);
max_slave_rlag = rses_get_max_replication_lag(myrses);
/**