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ruanhaishen
redis
Commits
026e6339
Commit
026e6339
authored
Sep 27, 2013
by
antirez
Browse files
Cluster: update the node configEpoch when newer is detected.
parent
7c4b8f29
Changes
1
Hide whitespace changes
Inline
Side-by-side
src/cluster.c
View file @
026e6339
...
...
@@ -914,14 +914,17 @@ int clusterProcessPacket(clusterLink *link) {
if
(
totlen
!=
explen
)
return
1
;
}
/* Check if the sender is known.
* If it is, update our currentEpoch to its epoch if greater than our. */
/* Check if the sender is a known node. */
sender
=
clusterLookupNode
(
hdr
->
sender
);
if
(
sender
&&
!
(
sender
->
flags
&
REDIS_NODE_HANDSHAKE
))
{
/* Update our curretEpoch if we see a newer epoch in the cluster. */
senderCurrentEpoch
=
ntohu64
(
hdr
->
currentEpoch
);
senderConfigEpoch
=
ntohu64
(
hdr
->
configEpoch
);
if
(
senderCurrentEpoch
>
server
.
cluster
->
currentEpoch
)
server
.
cluster
->
currentEpoch
=
senderCurrentEpoch
;
/* Update the sender configEpoch if it is publishing a newer one. */
if
(
senderConfigEpoch
>
sender
->
configEpoch
)
sender
->
configEpoch
=
senderConfigEpoch
;
}
/* Process packets by type. */
...
...
@@ -1999,8 +2002,14 @@ void clusterUpdateState(void) {
}
/* If we can't reach at least half the masters, change the cluster state
* as FAIL, as we are not even able to mark nodes as FAIL in this side
* of the netsplit because of lack of majority. */
* to FAIL, as we are not even able to mark nodes as FAIL in this side
* of the netsplit because of lack of majority.
*
* TODO: when this condition is entered, we should not undo it for some
* (small) time after the majority is reachable again, to make sure that
* other nodes have enough time to inform this node of a configuration change.
* Otherwise a client with an old routing table may write to this node
* and later it may turn into a slave losing the write. */
{
int
needed_quorum
=
(
server
.
cluster
->
size
/
2
)
+
1
;
...
...
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