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MXS-1209: Ensure master is connected to in main worker

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This commit is contained in:
Johan Wikman 2017-04-27 11:00:07 +03:00
parent 1e98de7b15
commit a4f9beb1ad
2 changed files with 44 additions and 4 deletions
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1
server/modules/routing/binlogrouter/blr.c
View File

@ -77,6 +77,7 @@
#include <maxscale/dcb.h>
#include <maxscale/spinlock.h>
#include <maxscale/housekeeper.h>
#include <maxscale/worker.h>
#include <time.h>
#include <maxscale/log_manager.h>

47
server/modules/routing/binlogrouter/blr_master.c
View File

@ -129,6 +129,9 @@ static void blr_register_selectvercomment(ROUTER_INSTANCE *router, GWBUF *buf);
static void blr_register_selecthostname(ROUTER_INSTANCE *router, GWBUF *buf);
static void blr_register_selectmap(ROUTER_INSTANCE *router, GWBUF *buf);
static void worker_cb_start_master(int worker_id, void* data);
static void blr_start_master_in_main(void* data);
static int keepalive = 1;
/** Master Semi-Sync capability */
@ -218,7 +221,7 @@ blr_start_master(void* data)
if (name)
{
sprintf(name, "%s Master", router->service->name);
hktask_oneshot(name, blr_start_master, router,
hktask_oneshot(name, blr_start_master_in_main, router,
BLR_MASTER_BACKOFF_TIME * router->retry_backoff++);
MXS_FREE(name);
}
@ -259,6 +262,42 @@ blr_start_master(void* data)
router->stats.n_masterstarts++;
}
/**
* Callback function to be called in the context of the main worker.
*
* @param worker_id The id of the worker in whose context the function is called.
* @param data The data to be passed to `blr_start_master`
*/
static void worker_cb_start_master(int worker_id, void* data)
{
// This is itended to be called only in the main worker.
ss_dassert(worker_id == 0);
blr_start_master(data);
}
/**
* Start master in the main Worker.
*
* @param data Data intended for `blr_start_master`.
*/
static void blr_start_master_in_main(void* data)
{
// The master should be connected to in the main worker, so we post it a
// message and call `blr_start_master` there.
MXS_WORKER* worker = mxs_worker_get(0); // The worker running in the main thread.
ss_dassert(worker);
intptr_t arg1 = (intptr_t)worker_cb_start_master;
intptr_t arg2 = (intptr_t)data;
if (!mxs_worker_post_message(worker, MXS_WORKER_MSG_CALL, arg1, arg2))
{
MXS_ERROR("Could not post message to main worker.");
}
}
/**
* Reconnect to the master server.
*
@ -286,7 +325,7 @@ blr_restart_master(ROUTER_INSTANCE *router)
if (name)
{
sprintf(name, "%s Master", router->service->name);
hktask_oneshot(name, blr_start_master, router,
hktask_oneshot(name, blr_start_master_in_main, router,
BLR_MASTER_BACKOFF_TIME * router->retry_backoff++);
MXS_FREE(name);
}
@ -298,7 +337,7 @@ blr_restart_master(ROUTER_INSTANCE *router)
else
{
router->master_state = BLRM_UNCONNECTED;
blr_start_master(router);
blr_start_master_in_main(router);
}
}
@ -376,7 +415,7 @@ blr_master_delayed_connect(ROUTER_INSTANCE *router)
if (name)
{
sprintf(name, "%s Master Recovery", router->service->name);
hktask_oneshot(name, blr_start_master, router, 60);
hktask_oneshot(name, blr_start_master_in_main, router, 60);
MXS_FREE(name);
}
}