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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.indices.recovery;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.translog.Translog;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
/**
* A recovery handler that skips phase 1 as well as sending the snapshot. During phase 3 the shard is marked
* as relocated an closed to ensure that the engine is closed and the target can acquire the IW write lock.
*/
public class SharedFSRecoverySourceHandler extends RecoverySourceHandler {
private final IndexShard shard;
private final StartRecoveryRequest request;
public SharedFSRecoverySourceHandler(IndexShard shard, StartRecoveryRequest request, RecoverySettings recoverySettings, TransportService transportService, ESLogger logger) {
super(shard, request, recoverySettings, transportService, logger);
this.shard = shard;
this.request = request;
}
@Override
public RecoveryResponse recoverToTarget() {
boolean engineClosed = false;
try {
logger.trace("{} recovery [phase1] to {}: skipping phase 1 for shared filesystem", request.shardId(), request.targetNode());
if (isPrimaryRelocation()) {
logger.debug("[phase1] closing engine on primary for shared filesystem recovery");
try {
// if we relocate we need to close the engine in order to open a new
// IndexWriter on the other end of the relocation
engineClosed = true;
shard.engine().flushAndClose();
} catch (IOException e) {
logger.warn("close engine failed", e);
shard.failShard("failed to close engine (phase1)", e);
}
}
prepareTargetForTranslog(Translog.View.EMPTY_VIEW);
finalizeRecovery();
return response;
} catch (Throwable t) {
if (engineClosed) {
// If the relocation fails then the primary is closed and can't be
// used anymore... (because it's closed) that's a problem, so in
// that case, fail the shard to reallocate a new IndexShard and
// create a new IndexWriter
logger.info("recovery failed for primary shadow shard, failing shard");
// pass the failure as null, as we want to ensure the store is not marked as corrupted
shard.failShard("primary relocation failed on shared filesystem caused by: [" + t.getMessage() + "]", null);
} else {
logger.info("recovery failed on shared filesystem", t);
}
throw t;
}
}
@Override
protected int sendSnapshot(Translog.Snapshot snapshot) {
logger.trace("{} skipping recovery of translog snapshot on shared filesystem to: {}",
shard.shardId(), request.targetNode());
return 0;
}
private boolean isPrimaryRelocation() {
return request.recoveryType() == RecoveryState.Type.RELOCATION && shard.routingEntry().primary();
}
}