| /* |
| * * |
| * 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.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() {} |
| } |