@Override
public void messageReceived(RecoveryCleanFilesRequest request, TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final RecoveryStatus recoveryStatus = statusRef.status();
recoveryStatus.state().getTranslog().totalOperations(request.totalTranslogOps());
// first, we go and move files that were created with the recovery id suffix to
// the actual names, its ok if we have a corrupted index here, since we have replicas
// to recover from in case of a full cluster shutdown just when this code executes...
recoveryStatus
.indexShard()
.deleteShardState(); // we have to delete it first since even if we fail to rename the
// shard might be invalid
recoveryStatus.renameAllTempFiles();
final Store store = recoveryStatus.store();
// now write checksums
recoveryStatus.legacyChecksums().write(store);
Store.MetadataSnapshot sourceMetaData = request.sourceMetaSnapshot();
try {
store.cleanupAndVerify("recovery CleanFilesRequestHandler", sourceMetaData);
} catch (CorruptIndexException
| IndexFormatTooNewException
| IndexFormatTooOldException ex) {
// this is a fatal exception at this stage.
// this means we transferred files from the remote that have not be checksummed and they
// are
// broken. We have to clean up this shard entirely, remove all files and bubble it up to
// the
// source shard since this index might be broken there as well? The Source can handle this
// and checks
// its content on disk if possible.
try {
try {
store.removeCorruptionMarker();
} finally {
Lucene.cleanLuceneIndex(store.directory()); // clean up and delete all files
}
} catch (Throwable e) {
logger.debug("Failed to clean lucene index", e);
ex.addSuppressed(e);
}
RecoveryFailedException rfe =
new RecoveryFailedException(
recoveryStatus.state(), "failed to clean after recovery", ex);
recoveryStatus.fail(rfe, true);
throw rfe;
} catch (Exception ex) {
RecoveryFailedException rfe =
new RecoveryFailedException(
recoveryStatus.state(), "failed to clean after recovery", ex);
recoveryStatus.fail(rfe, true);
throw rfe;
}
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
}
@Override
public void messageReceived(RecoveryFinalizeRecoveryRequest request, TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final RecoveryStatus recoveryStatus = statusRef.status();
recoveryStatus.indexShard().finalizeRecovery();
}
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
@Override
public void messageReceived(final RecoveryFileChunkRequest request, TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final RecoveryStatus recoveryStatus = statusRef.status();
final Store store = recoveryStatus.store();
recoveryStatus.state().getTranslog().totalOperations(request.totalTranslogOps());
final RecoveryState.Index indexState = recoveryStatus.state().getIndex();
if (request.sourceThrottleTimeInNanos() != RecoveryState.Index.UNKNOWN) {
indexState.addSourceThrottling(request.sourceThrottleTimeInNanos());
}
IndexOutput indexOutput;
if (request.position() == 0) {
indexOutput =
recoveryStatus.openAndPutIndexOutput(request.name(), request.metadata(), store);
} else {
indexOutput = recoveryStatus.getOpenIndexOutput(request.name());
}
BytesReference content = request.content();
if (!content.hasArray()) {
content = content.toBytesArray();
}
RateLimiter rl = recoverySettings.rateLimiter();
if (rl != null) {
long bytes = bytesSinceLastPause.addAndGet(content.length());
if (bytes > rl.getMinPauseCheckBytes()) {
// Time to pause
bytesSinceLastPause.addAndGet(-bytes);
long throttleTimeInNanos = rl.pause(bytes);
indexState.addTargetThrottling(throttleTimeInNanos);
recoveryStatus.indexShard().recoveryStats().addThrottleTime(throttleTimeInNanos);
}
}
indexOutput.writeBytes(content.array(), content.arrayOffset(), content.length());
indexState.addRecoveredBytesToFile(request.name(), content.length());
if (indexOutput.getFilePointer() >= request.length() || request.lastChunk()) {
try {
Store.verify(indexOutput);
} finally {
// we are done
indexOutput.close();
}
// write the checksum
recoveryStatus.legacyChecksums().add(request.metadata());
final String temporaryFileName = recoveryStatus.getTempNameForFile(request.name());
assert Arrays.asList(store.directory().listAll()).contains(temporaryFileName);
store.directory().sync(Collections.singleton(temporaryFileName));
IndexOutput remove = recoveryStatus.removeOpenIndexOutputs(request.name());
assert remove == null || remove == indexOutput; // remove maybe null if we got finished
}
}
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
@Override
public void messageReceived(
RecoveryPrepareForTranslogOperationsRequest request, TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final RecoveryStatus recoveryStatus = statusRef.status();
recoveryStatus.state().getTranslog().totalOperations(request.totalTranslogOps());
recoveryStatus.indexShard().skipTranslogRecovery();
}
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
@Override
public void doRun() {
RecoveriesCollection.StatusRef statusRef = onGoingRecoveries.getStatus(recoveryId);
if (statusRef == null) {
logger.trace(
"not running recovery with id [{}] - can't find it (probably finished)", recoveryId);
return;
}
try {
doRecovery(statusRef.status());
} finally {
statusRef.close();
}
}
@Override
public void onFailure(Throwable t) {
try (RecoveriesCollection.StatusRef statusRef = onGoingRecoveries.getStatus(recoveryId)) {
if (statusRef != null) {
logger.error("unexpected error during recovery [{}], failing shard", t, recoveryId);
onGoingRecoveries.failRecovery(
recoveryId,
new RecoveryFailedException(statusRef.status().state(), "unexpected error", t),
true // be safe
);
} else {
logger.debug(
"unexpected error during recovery, but recovery id [{}] is finished", t, recoveryId);
}
}
}
@Override
public void messageReceived(RecoveryFilesInfoRequest request, TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final RecoveryStatus recoveryStatus = statusRef.status();
final RecoveryState.Index index = recoveryStatus.state().getIndex();
for (int i = 0; i < request.phase1ExistingFileNames.size(); i++) {
index.addFileDetail(
request.phase1ExistingFileNames.get(i), request.phase1ExistingFileSizes.get(i), true);
}
for (int i = 0; i < request.phase1FileNames.size(); i++) {
index.addFileDetail(
request.phase1FileNames.get(i), request.phase1FileSizes.get(i), false);
}
recoveryStatus.state().getTranslog().totalOperations(request.totalTranslogOps);
recoveryStatus.state().getTranslog().totalOperationsOnStart(request.totalTranslogOps);
// recoveryBytesCount / recoveryFileCount will be set as we go...
channel.sendResponse(TransportResponse.Empty.INSTANCE);
}
}
@Override
public void messageReceived(
final RecoveryTranslogOperationsRequest request, final TransportChannel channel)
throws Exception {
try (RecoveriesCollection.StatusRef statusRef =
onGoingRecoveries.getStatusSafe(request.recoveryId(), request.shardId())) {
final ClusterStateObserver observer =
new ClusterStateObserver(clusterService, null, logger);
final RecoveryStatus recoveryStatus = statusRef.status();
final RecoveryState.Translog translog = recoveryStatus.state().getTranslog();
translog.totalOperations(request.totalTranslogOps());
assert recoveryStatus.indexShard().recoveryState() == recoveryStatus.state();
try {
recoveryStatus.indexShard().performBatchRecovery(request.operations());
channel.sendResponse(TransportResponse.Empty.INSTANCE);
} catch (TranslogRecoveryPerformer.BatchOperationException exception) {
MapperException mapperException =
(MapperException) ExceptionsHelper.unwrap(exception, MapperException.class);
if (mapperException == null) {
throw exception;
}
// in very rare cases a translog replay from primary is processed before a mapping update
// on this node
// which causes local mapping changes. we want to wait until these mappings are processed.
logger.trace(
"delaying recovery due to missing mapping changes (rolling back stats for [{}] ops)",
exception,
exception.completedOperations());
translog.decrementRecoveredOperations(exception.completedOperations());
// we do not need to use a timeout here since the entire recovery mechanism has an
// inactivity protection (it will be
// canceled)
observer.waitForNextChange(
new ClusterStateObserver.Listener() {
@Override
public void onNewClusterState(ClusterState state) {
try {
messageReceived(request, channel);
} catch (Exception e) {
onFailure(e);
}
}
protected void onFailure(Exception e) {
try {
channel.sendResponse(e);
} catch (IOException e1) {
logger.warn("failed to send error back to recovery source", e1);
}
}
@Override
public void onClusterServiceClose() {
onFailure(
new ElasticsearchException(
"cluster service was closed while waiting for mapping updates"));
}
@Override
public void onTimeout(TimeValue timeout) {
// note that we do not use a timeout (see comment above)
onFailure(
new ElasticsearchTimeoutException(
"timed out waiting for mapping updates (timeout [" + timeout + "])"));
}
});
}
}
}