| /** |
| * 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.yarn.client; |
| |
| import java.io.EOFException; |
| import java.net.ConnectException; |
| import java.net.InetSocketAddress; |
| import java.net.NoRouteToHostException; |
| import java.net.SocketException; |
| import java.net.UnknownHostException; |
| import java.security.PrivilegedAction; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Public; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.retry.RetryPolicies; |
| import org.apache.hadoop.io.retry.RetryPolicy; |
| import org.apache.hadoop.io.retry.RetryProxy; |
| import org.apache.hadoop.ipc.RetriableException; |
| import org.apache.hadoop.net.ConnectTimeoutException; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.yarn.exceptions.NMNotYetReadyException; |
| import org.apache.hadoop.yarn.ipc.YarnRPC; |
| |
| import com.google.common.base.Preconditions; |
| |
| @Public |
| @Unstable |
| public class ServerProxy { |
| |
| protected static RetryPolicy createRetryPolicy(Configuration conf, |
| String maxWaitTimeStr, long defMaxWaitTime, |
| String connectRetryIntervalStr, long defRetryInterval) { |
| long maxWaitTime = conf.getLong(maxWaitTimeStr, defMaxWaitTime); |
| long retryIntervalMS = |
| conf.getLong(connectRetryIntervalStr, defRetryInterval); |
| |
| Preconditions.checkArgument((maxWaitTime == -1 || maxWaitTime > 0), |
| "Invalid Configuration. " + maxWaitTimeStr + " should be either" |
| + " positive value or -1."); |
| Preconditions.checkArgument(retryIntervalMS > 0, "Invalid Configuration. " |
| + connectRetryIntervalStr + "should be a positive value."); |
| |
| RetryPolicy retryPolicy = null; |
| if (maxWaitTime == -1) { |
| // wait forever. |
| retryPolicy = RetryPolicies.retryForeverWithFixedSleep(retryIntervalMS, |
| TimeUnit.MILLISECONDS); |
| } else { |
| retryPolicy = |
| RetryPolicies.retryUpToMaximumTimeWithFixedSleep(maxWaitTime, |
| retryIntervalMS, TimeUnit.MILLISECONDS); |
| } |
| |
| Map<Class<? extends Exception>, RetryPolicy> exceptionToPolicyMap = |
| new HashMap<Class<? extends Exception>, RetryPolicy>(); |
| exceptionToPolicyMap.put(EOFException.class, retryPolicy); |
| exceptionToPolicyMap.put(ConnectException.class, retryPolicy); |
| exceptionToPolicyMap.put(NoRouteToHostException.class, retryPolicy); |
| exceptionToPolicyMap.put(UnknownHostException.class, retryPolicy); |
| exceptionToPolicyMap.put(ConnectTimeoutException.class, retryPolicy); |
| exceptionToPolicyMap.put(RetriableException.class, retryPolicy); |
| exceptionToPolicyMap.put(SocketException.class, retryPolicy); |
| |
| /* |
| * Still keeping this to cover case like newer client talking |
| * to an older version of server |
| */ |
| exceptionToPolicyMap.put(NMNotYetReadyException.class, retryPolicy); |
| |
| return RetryPolicies.retryByException(RetryPolicies.TRY_ONCE_THEN_FAIL, |
| exceptionToPolicyMap); |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected static <T> T createRetriableProxy(final Configuration conf, |
| final Class<T> protocol, final UserGroupInformation user, |
| final YarnRPC rpc, final InetSocketAddress serverAddress, |
| RetryPolicy retryPolicy) { |
| T proxy = user.doAs(new PrivilegedAction<T>() { |
| @Override |
| public T run() { |
| return (T) rpc.getProxy(protocol, serverAddress, conf); |
| } |
| }); |
| return (T) RetryProxy.create(protocol, proxy, retryPolicy); |
| } |
| } |