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Merge pull request #14765 from ywelsch/fix/delayed-allocation-race 

Fix calculation of next delay for delayed shard allocation
This commit is contained in:
Yannick Welsch 2015-11-16 14:07:35 +01:00
parent 293b2f6345 2206030fe6
commit fb10e59578
1 changed files with 11 additions and 5 deletions
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16
core/src/main/java/org/elasticsearch/cluster/routing/RoutingService.java
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@ -118,11 +118,17 @@ public class RoutingService extends AbstractLifecycleComponent<RoutingService> i
if (nextDelaySetting > 0 && nextDelaySetting < registeredNextDelaySetting) {
FutureUtils.cancel(registeredNextDelayFuture);
registeredNextDelaySetting = nextDelaySetting;
// We use System.currentTimeMillis here because we want the
// next delay from the "now" perspective, rather than the
// delay from the last time the GatewayAllocator tried to
// assign/delay the shard
TimeValue nextDelay = TimeValue.timeValueMillis(UnassignedInfo.findNextDelayedAllocationIn(System.currentTimeMillis(), settings, event.state()));
// We calculate nextDelay based on System.currentTimeMillis() here because we want the next delay from the "now" perspective
// rather than the delay from the last time the GatewayAllocator tried to assign/delay the shard.
// The actual calculation is based on the latter though, to account for shards that should have been allocated
// between unassignedShardsAllocatedTimestamp and System.currentTimeMillis()
long nextDelayBasedOnUnassignedShardsAllocatedTimestamp = UnassignedInfo.findNextDelayedAllocationIn(unassignedShardsAllocatedTimestamp, settings, event.state());
// adjust from unassignedShardsAllocatedTimestamp to now
long nextDelayMillis = nextDelayBasedOnUnassignedShardsAllocatedTimestamp - (System.currentTimeMillis() - unassignedShardsAllocatedTimestamp);
if (nextDelayMillis < 0) {
nextDelayMillis = 0;
}
TimeValue nextDelay = TimeValue.timeValueMillis(nextDelayMillis);
int unassignedDelayedShards = UnassignedInfo.getNumberOfDelayedUnassigned(unassignedShardsAllocatedTimestamp, settings, event.state());
if (unassignedDelayedShards > 0) {
logger.info("delaying allocation for [{}] unassigned shards, next check in [{}]",