org.apache.hadoop.util.concurrent.ExecutorHelper 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.util.concurrent;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
/** Helper functions for Executors. */
public final class ExecutorHelper {
private static final Logger LOG = LoggerFactory
.getLogger(ExecutorHelper.class);
static void logThrowableFromAfterExecute(Runnable r, Throwable t) {
if (LOG.isDebugEnabled()) {
LOG.debug("afterExecute in thread: " + Thread.currentThread()
.getName() + ", runnable type: " + r.getClass().getName());
}
//For additional information, see: https://docs.oracle
// .com/javase/7/docs/api/java/util/concurrent/ThreadPoolExecutor
// .html#afterExecute(java.lang.Runnable,%20java.lang.Throwable)
// Handle JDK-8071638
if (t == null && r instanceof Future && ((Future) r).isDone()) {
try {
((Future) r).get();
} catch (ExecutionException ee) {
LOG.warn(
"Execution exception when running task in " + Thread.currentThread()
.getName());
t = ee.getCause();
} catch (InterruptedException ie) {
LOG.warn("Thread (" + Thread.currentThread() + ") interrupted: ", ie);
Thread.currentThread().interrupt();
} catch (Throwable throwable) {
t = throwable;
}
}
if (t != null) {
LOG.warn("Caught exception in thread " + Thread
.currentThread().getName() + ": ", t);
}
}
private ExecutorHelper() {}
}