org.apache.phoenix.hbase.index.write.TrackingParallelWriterIndexCommitter Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE
* file distributed with this work for additional information regarding copyright ownership. The ASF 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.apache.phoenix.hbase.index.write;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Abortable;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.hbase.client.HTableInterface;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.phoenix.coprocessor.MetaDataProtocol;
import org.apache.phoenix.hbase.index.CapturingAbortable;
import org.apache.phoenix.hbase.index.exception.MultiIndexWriteFailureException;
import org.apache.phoenix.hbase.index.exception.SingleIndexWriteFailureException;
import org.apache.phoenix.hbase.index.parallel.EarlyExitFailure;
import org.apache.phoenix.hbase.index.parallel.Task;
import org.apache.phoenix.hbase.index.parallel.TaskBatch;
import org.apache.phoenix.hbase.index.parallel.TaskRunner;
import org.apache.phoenix.hbase.index.parallel.ThreadPoolBuilder;
import org.apache.phoenix.hbase.index.parallel.ThreadPoolManager;
import org.apache.phoenix.hbase.index.parallel.WaitForCompletionTaskRunner;
import org.apache.phoenix.hbase.index.table.HTableFactory;
import org.apache.phoenix.hbase.index.table.HTableInterfaceReference;
import org.apache.phoenix.hbase.index.util.KeyValueBuilder;
import org.apache.phoenix.index.PhoenixIndexFailurePolicy;
import org.apache.phoenix.util.IndexUtil;
import com.google.common.collect.Multimap;
/**
* Like the {@link ParallelWriterIndexCommitter}, but blocks until all writes have attempted to allow the caller to
* retrieve the failed and succeeded index updates. Therefore, this class will be a lot slower, in the face of failures,
* when compared to the {@link ParallelWriterIndexCommitter} (though as fast for writes), so it should be used only when
* you need to at least attempt all writes and know their result; for instance, this is fine for doing WAL recovery -
* it's not a performance intensive situation and we want to limit the the edits we need to retry.
*
* On failure to {@link #write(Multimap)}, we return a {@link MultiIndexWriteFailureException} that contains the list of
* {@link HTableInterfaceReference} that didn't complete successfully.
*
* Failures to write to the index can happen several different ways:
*
* - this is {@link #stop(String) stopped} or aborted (via the passed {@link Abortable}. This causing any
* pending tasks to fail whatever they are doing as fast as possible. Any writes that have not begun are not even
* attempted and marked as failures.
* - A batch write fails. This is the generic HBase write failure - it may occur because the index table is not
* available, .META. or -ROOT- is unavailable, or any other (of many) possible HBase exceptions.
*
* Regardless of how the write fails, we still wait for all writes to complete before passing the failure back to the
* client.
*/
public class TrackingParallelWriterIndexCommitter implements IndexCommitter {
private static final Log LOG = LogFactory.getLog(TrackingParallelWriterIndexCommitter.class);
public static final String NUM_CONCURRENT_INDEX_WRITER_THREADS_CONF_KEY = "index.writer.threads.max";
private static final int DEFAULT_CONCURRENT_INDEX_WRITER_THREADS = 10;
private static final String INDEX_WRITER_KEEP_ALIVE_TIME_CONF_KEY = "index.writer.threads.keepalivetime";
private TaskRunner pool;
private HTableFactory retryingFactory;
private HTableFactory noRetriesFactory;
private CapturingAbortable abortable;
private Stoppable stopped;
private RegionCoprocessorEnvironment env;
private KeyValueBuilder kvBuilder;
// for testing
public TrackingParallelWriterIndexCommitter(String hbaseVersion) {
kvBuilder = KeyValueBuilder.get(hbaseVersion);
}
public TrackingParallelWriterIndexCommitter() {
}
@Override
public void setup(IndexWriter parent, RegionCoprocessorEnvironment env, String name) {
this.env = env;
Configuration conf = env.getConfiguration();
setup(IndexWriterUtils.getDefaultDelegateHTableFactory(env),
ThreadPoolManager.getExecutor(
new ThreadPoolBuilder(name, conf).setMaxThread(NUM_CONCURRENT_INDEX_WRITER_THREADS_CONF_KEY,
DEFAULT_CONCURRENT_INDEX_WRITER_THREADS).setCoreTimeout(
INDEX_WRITER_KEEP_ALIVE_TIME_CONF_KEY), env), env.getRegionServerServices(), parent, env);
this.kvBuilder = KeyValueBuilder.get(env.getHBaseVersion());
}
/**
* Setup this.
*
* Exposed for TESTING
*/
void setup(HTableFactory factory, ExecutorService pool, Abortable abortable, Stoppable stop,
RegionCoprocessorEnvironment env) {
this.pool = new WaitForCompletionTaskRunner(pool);
this.retryingFactory = factory;
this.noRetriesFactory = IndexWriterUtils.getNoRetriesHTableFactory(env);
this.abortable = new CapturingAbortable(abortable);
this.stopped = stop;
this.env = env;
}
@Override
public void write(Multimap toWrite, final boolean allowLocalUpdates, final int clientVersion) throws MultiIndexWriteFailureException {
Set>> entries = toWrite.asMap().entrySet();
TaskBatch tasks = new TaskBatch(entries.size());
List tables = new ArrayList(entries.size());
for (Entry> entry : entries) {
// get the mutations for each table. We leak the implementation here a little bit to save
// doing a complete copy over of all the index update for each table.
final List mutations = kvBuilder.cloneIfNecessary((List)entry.getValue());
// track each reference so we can get at it easily later, when determing failures
final HTableInterfaceReference tableReference = entry.getKey();
final RegionCoprocessorEnvironment env = this.env;
if (env != null
&& !allowLocalUpdates
&& tableReference.getTableName().equals(
env.getRegion().getTableDesc().getNameAsString())) {
continue;
}
tables.add(tableReference);
/*
* Write a batch of index updates to an index table. This operation stops (is cancelable) via two
* mechanisms: (1) setting aborted or stopped on the IndexWriter or, (2) interrupting the running thread.
* The former will only work if we are not in the midst of writing the current batch to the table, though we
* do check these status variables before starting and before writing the batch. The latter usage,
* interrupting the thread, will work in the previous situations as was at some points while writing the
* batch, depending on the underlying writer implementation (HTableInterface#batch is blocking, but doesn't
* elaborate when is supports an interrupt).
*/
tasks.add(new Task() {
/**
* Do the actual write to the primary table.
*/
@SuppressWarnings("deprecation")
@Override
public Boolean call() throws Exception {
HTableInterface table = null;
try {
// this may have been queued, but there was an abort/stop so we try to early exit
throwFailureIfDone();
if (allowLocalUpdates
&& env != null
&& tableReference.getTableName().equals(
env.getRegion().getTableDesc().getNameAsString())) {
try {
throwFailureIfDone();
IndexUtil.writeLocalUpdates(env.getRegion(), mutations, true);
return Boolean.TRUE;
} catch (IOException ignord) {
// when it's failed we fall back to the standard & slow way
if (LOG.isTraceEnabled()) {
LOG.trace("indexRegion.batchMutate failed and fall back to HTable.batch(). Got error="
+ ignord);
}
}
}
if (LOG.isTraceEnabled()) {
LOG.trace("Writing index update:" + mutations + " to table: " + tableReference);
}
// if the client can retry index writes, then we don't need to retry here
HTableFactory factory = clientVersion < MetaDataProtocol.MIN_CLIENT_RETRY_INDEX_WRITES ? retryingFactory : noRetriesFactory;
table = factory.getTable(tableReference.get());
throwFailureIfDone();
table.batch(mutations);
} catch (InterruptedException e) {
// reset the interrupt status on the thread
Thread.currentThread().interrupt();
throw e;
} catch (Exception e) {
throw e;
} finally {
if (table != null) {
table.close();
}
}
return Boolean.TRUE;
}
private void throwFailureIfDone() throws SingleIndexWriteFailureException {
if (stopped.isStopped() || abortable.isAborted() || Thread.currentThread().isInterrupted()) { throw new SingleIndexWriteFailureException(
"Pool closed, not attempting to write to the index!", null); }
}
});
}
List results = null;
try {
LOG.debug("Waiting on index update tasks to complete...");
results = this.pool.submitUninterruptible(tasks);
} catch (ExecutionException e) {
throw new RuntimeException("Should not fail on the results while using a WaitForCompletionTaskRunner", e);
} catch (EarlyExitFailure e) {
throw new RuntimeException("Stopped while waiting for batch, quiting!", e);
}
// track the failures. We only ever access this on return from our calls, so no extra
// synchronization is needed. We could update all the failures as we find them, but that add a
// lot of locking overhead, and just doing the copy later is about as efficient.
List failures = new ArrayList();
int index = 0;
for (Boolean result : results) {
// there was a failure
if (result == null) {
// we know which table failed by the index of the result
failures.add(tables.get(index));
}
index++;
}
// if any of the tasks failed, then we need to propagate the failure
if (failures.size() > 0) {
// make the list unmodifiable to avoid any more synchronization concerns
throw new MultiIndexWriteFailureException(Collections.unmodifiableList(failures),
PhoenixIndexFailurePolicy.getDisableIndexOnFailure(env));
}
return;
}
@Override
public void stop(String why) {
LOG.info("Shutting down " + this.getClass().getSimpleName());
this.pool.stop(why);
this.retryingFactory.shutdown();
this.noRetriesFactory.shutdown();
}
@Override
public boolean isStopped() {
return this.stopped.isStopped();
}
}