本文主要是介绍org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 7，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
错误 ：
org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep
2016-11-25 10:25:24,934 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl: appattempt_1479988153262_0002_000001 State change from SCHEDULED to ALLOCATED_SAVING
2016-11-25 10:25:24,934 INFO org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl: appattempt_1479988153262_0002_000001 State change from ALLOCATED_SAVING to ALLOCATED
2016-11-25 10:25:24,935 INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Launching masterappattempt_1479988153262_0002_000001
2016-11-25 10:25:24,937 INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Setting up container Container: [ContainerId: container_1479988153262_0002_01_000001, NodeId: localhost:7359, NodeHttpAddress: localhost:8042, Resource: <memory:2048, vCores:1>, Priority: 0, Token: Token { kind: ContainerToken, service: 127.0.0.1:7359 }, ] for AM appattempt_1479988153262_0002_000001
2016-11-25 10:25:24,938 INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Command to launch container container_1479988153262_0002_01_000001 : $JAVA_HOME/bin/java -Djava.io.tmpdir=$PWD/tmp -Dlog4j.configuration=container-log4j.properties -Dyarn.app.container.log.dir=<LOG_DIR> -Dyarn.app.container.log.filesize=0 -Dhadoop.root.logger=INFO,CLA -Dhadoop.root.logfile=syslog -Xmx1024m org.apache.hadoop.mapreduce.v2.app.MRAppMaster 1><LOG_DIR>/stdout 2><LOG_DIR>/stderr
2016-11-25 10:25:24,938 INFO org.apache.hadoop.yarn.server.resourcemanager.security.AMRMTokenSecretManager: Create AMRMToken for ApplicationAttempt: appattempt_1479988153262_0002_000001
2016-11-25 10:25:24,938 INFO org.apache.hadoop.yarn.server.resourcemanager.security.AMRMTokenSecretManager: Creating password for appattempt_1479988153262_0002_000001
2016-11-25 10:25:25,939 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:25:26,940 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:25:27,940 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:25:28,941 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:25:29,942 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
重复......
2016-11-25 10:31:33,264 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:31:34,125 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:31:34,264 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:31:35,126 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2016-11-25 10:31:35,128 INFO org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher: Error launching appattempt_1479988153262_0002_000001. Got exception: java.net.ConnectException: Call From vm10-0-0-2.ksc.com/127.0.0.1 to localhost:7359 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
at sun.reflect.GeneratedConstructorAccessor39.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526) at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:792)
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:732) at org.apache.hadoop.ipc.Client.call(Client.java:1479)
at org.apache.hadoop.ipc.Client.call(Client.java:1412) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
at com.sun.proxy.$Proxy81.startContainers(Unknown Source)
at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:96)
at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:96)
at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:191)
at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
at com.sun.proxy.$Proxy82.startContainers(Unknown Source)
at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:118)
at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:250)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)Caused by: java.net.ConnectException: Connection refused
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744)
at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531)
at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:495)
at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:614)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:712)
at org.apache.hadoop.ipc.Client$Connection.access$2900(Client.java:375)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1528)
at org.apache.hadoop.ipc.Client.call(Client.java:1451)
... 15 more
运行 job 时 发送卡顿， 到
时就不动了。 然后查看 yarn-hadoop-resourcemanager-vm10-0-0-0.ksc.com.log 日志，发现上面的问题。
1 修改类配置文件 ，一直不好，甚至重新配置 删除了hadoop 有重新配置了一次也没有好。
网上资料说是： 配置 有关于yarn的 有可能是资源分配不对 ， 还有的hadoop/tmp/dir 路径不要配置在 /tmp 的临时文件路径下 ，我的都不是。
2 修改 etc/hosts 和 etc/hostname 文件
hostname 文件影响不大， 看情况配置。
hosts 文件 ，因为我配置的是伪分布式集群，所以 第一行 127.0.01 localhost 是必须有的， 但是真正集群的时候，网上的有的说不需要 。个人可以试试。
解决 ，都试过后 看见一个贴子
http://anyoneking.com/archives/603 hadoop数据节点通信异常
了解到 这个是 连接不到 namenode 节点 ， 之前本人也通过判断是这个原因 。
补充一点 ：之前只是在运行 job 时 爆出 连接不到的问题 ，其他正常启动 。
最后 看到他在 修改掉近期的 别人修改的hosts 文件(添加 127.0.0.1 localhost 时) ，去除掉 ，没有好， 但是重启后就可以了。
本人也重启了一下 ，然后奇迹般的好了。 这个可能是哪里缓存了一些数据影响到了 环境的配置与修改 。
这里mark一下 。
这篇关于org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:7359. Already tried 7的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！
