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Cluster: bypass data_age check for manual failovers.

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Automatic failovers only happen in Redis Cluster if the slave trying to
be elected was disconnected from its master for no more than 10 times
the node-timeout value. However there should be no such a check for
manual failovers, since these are initiated by the sysadmin that, in
theory, knows what she is doing when a slave is selected to be promoted.
This commit is contained in:
antirez 2014-05-12 16:12:12 +02:00
parent b252fab06c
commit 005f564eb3
1 changed files with 11 additions and 4 deletions
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15
src/cluster.c
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@ -2305,7 +2305,8 @@ void clusterHandleSlaveFailover(void) {
if (auth_timeout < 2000) auth_timeout = 2000;
auth_retry_time = auth_timeout*2;
/* Pre conditions to run the function:
/* Pre conditions to run the function, that must be met both in case
* of an automatic or manual failover:
* 1) We are a slave.
* 2) Our master is flagged as FAIL, or this is a manual failover.
* 3) It is serving slots. */
@ -2330,11 +2331,15 @@ void clusterHandleSlaveFailover(void) {
/* Check if our data is recent enough. For now we just use a fixed
* constant of ten times the node timeout since the cluster should
* react much faster to a master down. */
* react much faster to a master down.
*
* Check bypassed for manual failovers. */
if (data_age >
(server.repl_ping_slave_period * 1000) +
(server.cluster_node_timeout * REDIS_CLUSTER_SLAVE_VALIDITY_MULT))
return;
{
if (!manual_failover) return;
}
/* If the previous failover attempt timedout and the retry time has
* elapsed, we can setup a new one. */
@ -2370,7 +2375,9 @@ void clusterHandleSlaveFailover(void) {
/* It is possible that we received more updated offsets from other
* slaves for the same master since we computed our election delay.
* Update the delay if our rank changed. */
* Update the delay if our rank changed.
*
* Not performed if this is a manual failover. */
if (server.cluster->failover_auth_sent == 0 &&
server.cluster->mf_end == 0)
{