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Cluster: master node must clear its hash slots when turning into a slave.

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When a master turns into a slave after a failover event, make sure to
clear the assigned slots before setting up the replication, as a slave
should never claim slots in an explicit way, but just take over the
master slots when replacing its master.
This commit is contained in:
antirez 2013-03-20 11:32:35 +01:00
parent 506f9a42b0
commit e006407fd0
1 changed files with 4 additions and 1 deletions
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5
src/cluster.c
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@ -907,6 +907,7 @@ int clusterProcessPacket(clusterLink *link) {
oldmaster == server.cluster->myself) oldmaster == server.cluster->myself)
{ {
redisLog(REDIS_WARNING,"One of my slaves took my place. Reconfiguring myself as a replica of %.40s", sender->name); redisLog(REDIS_WARNING,"One of my slaves took my place. Reconfiguring myself as a replica of %.40s", sender->name);
clusterDelNodeSlots(server.cluster->myself);
clusterSetMaster(sender); clusterSetMaster(sender);
} }
@ -1836,11 +1837,13 @@ int verifyClusterConfigWithData(void) {
* SLAVE nodes handling * SLAVE nodes handling
* -------------------------------------------------------------------------- */ * -------------------------------------------------------------------------- */
/* Set the specified node 'n' as master. */ /* Set the specified node 'n' as master. Setup the node as a slave if
* needed. */
void clusterSetMaster(clusterNode *n) { void clusterSetMaster(clusterNode *n) {
clusterNode *myself = server.cluster->myself; clusterNode *myself = server.cluster->myself;
redisAssert(n != myself); redisAssert(n != myself);
redisAssert(myself->numslots == 0);
if (myself->flags & REDIS_NODE_MASTER) { if (myself->flags & REDIS_NODE_MASTER) {
myself->flags &= ~REDIS_NODE_MASTER; myself->flags &= ~REDIS_NODE_MASTER;