public void execute() throws Exception {
final String activeShardCountFailure = checkActiveShardCount();
final ShardRouting primaryRouting = primary.routingEntry();
final ShardId primaryId = primaryRouting.shardId();
if (activeShardCountFailure != null) {
finishAsFailed(
new UnavailableShardsException(
primaryId,
"{} Timeout: [{}], request: [{}]",
activeShardCountFailure,
request.timeout(),
request));
return;
}
totalShards.incrementAndGet();
pendingShards.incrementAndGet();
primaryResult = primary.perform(request);
final ReplicaRequest replicaRequest = primaryResult.replicaRequest();
assert replicaRequest.primaryTerm() > 0 : "replicaRequest doesn't have a primary term";
if (logger.isTraceEnabled()) {
logger.trace(
"[{}] op [{}] completed on primary for request [{}]", primaryId, opType, request);
}
performOnReplicas(primaryId, replicaRequest);
successfulShards.incrementAndGet();
decPendingAndFinishIfNeeded();
}
@Override
public void readFrom(StreamInput in) throws IOException {
shardId = in.readVInt();
request = newReplicaRequestInstance();
request.readFrom(in);
}
@Override
public void writeTo(StreamOutput out) throws IOException {
out.writeVInt(shardId);
request.writeTo(out);
}
/** send operation to the given node or perform it if local */
void performOnReplica(final ShardRouting shard, final String nodeId) {
// if we don't have that node, it means that it might have failed and will be created again,
// in
// this case, we don't have to do the operation, and just let it failover
if (!observer.observedState().nodes().nodeExists(nodeId)) {
onReplicaFailure(nodeId, null);
return;
}
replicaRequest.internalShardId = shardIt.shardId();
if (!nodeId.equals(observer.observedState().nodes().localNodeId())) {
final DiscoveryNode node = observer.observedState().nodes().get(nodeId);
transportService.sendRequest(
node,
transportReplicaAction,
replicaRequest,
transportOptions,
new EmptyTransportResponseHandler(ThreadPool.Names.SAME) {
@Override
public void handleResponse(TransportResponse.Empty vResponse) {
onReplicaSuccess();
}
@Override
public void handleException(TransportException exp) {
logger.trace(
"[{}] transport failure during replica request [{}] ",
exp,
node,
replicaRequest);
if (ignoreReplicaException(exp)) {
onReplicaFailure(nodeId, exp);
} else {
logger.warn(
"{} failed to perform {} on node {}",
exp,
shardIt.shardId(),
actionName,
node);
shardStateAction.shardFailed(
shard,
indexMetaData.getIndexUUID(),
"failed to perform " + actionName + " on replica on node " + node,
exp,
shardFailedTimeout,
new ReplicationFailedShardStateListener(nodeId, exp));
}
}
});
} else {
try {
threadPool
.executor(executor)
.execute(
new AbstractRunnable() {
@Override
protected void doRun() {
try {
shardOperationOnReplica(shard.shardId(), replicaRequest);
onReplicaSuccess();
} catch (Throwable e) {
onReplicaFailure(nodeId, e);
failReplicaIfNeeded(shard.index(), shard.id(), e);
}
}
// we must never reject on because of thread pool capacity on replicas
@Override
public boolean isForceExecution() {
return true;
}
@Override
public void onFailure(Throwable t) {
onReplicaFailure(nodeId, t);
}
});
} catch (Throwable e) {
failReplicaIfNeeded(shard.index(), shard.id(), e);
onReplicaFailure(nodeId, e);
}
}
}