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Cluster: update our currentEpoch when a greater one is seen.

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This commit is contained in:
antirez 2013-09-25 12:36:29 +02:00
parent d426ada891
commit 6ec795d2cf
1 changed files with 10 additions and 1 deletions
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11
src/cluster.c
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@ -873,6 +873,7 @@ int clusterProcessPacket(clusterLink *link) {
uint32_t totlen = ntohl(hdr->totlen); uint32_t totlen = ntohl(hdr->totlen);
uint16_t type = ntohs(hdr->type); uint16_t type = ntohs(hdr->type);
uint16_t flags = ntohs(hdr->flags); uint16_t flags = ntohs(hdr->flags);
uint64_t senderCurrentEpoch, senderConfigEpoch;
clusterNode *sender; clusterNode *sender;
redisLog(REDIS_DEBUG,"--- Processing packet of type %d, %lu bytes", redisLog(REDIS_DEBUG,"--- Processing packet of type %d, %lu bytes",
@ -909,9 +910,17 @@ int clusterProcessPacket(clusterLink *link) {
if (totlen != explen) return 1; if (totlen != explen) return 1;
} }
/* Process packets by type. */ /* Check if the sender is known.
* If it is, update our currentEpoch to its epoch if greater than our. */
sender = clusterLookupNode(hdr->sender); sender = clusterLookupNode(hdr->sender);
if (sender && !(sender->flags & REDIS_NODE_HANDSHAKE)) {
senderCurrentEpoch = ntohu64(hdr->currentEpoch);
senderConfigEpoch = ntohu64(hdr->configEpoch);
if (senderCurrentEpoch > server.cluster->currentEpoch)
server.cluster->currentEpoch = senderCurrentEpoch;
}
/* Process packets by type. */
if (type == CLUSTERMSG_TYPE_PING || type == CLUSTERMSG_TYPE_MEET) { if (type == CLUSTERMSG_TYPE_PING || type == CLUSTERMSG_TYPE_MEET) {
int update_config = 0; int update_config = 0;
redisLog(REDIS_DEBUG,"Ping packet received: %p", (void*)link->node); redisLog(REDIS_DEBUG,"Ping packet received: %p", (void*)link->node);