我有一个Hadoop群集(HDP 2.1)。一切工作了很长时间，但是突然作业开始返回以下经常性错误:
16/10/13 16:21:11 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
16/10/13 16:21:12 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
16/10/13 16:21:12 INFO impl.TimelineClientImpl: Timeline service address: http://dev-fiwr-bignode-12.hi.inet:8188/ws/v1/timeline/
16/10/13 16:21:13 INFO client.RMProxy: Connecting to ResourceManager at dev-fiwr-bignode-12.hi.inet/10.95.76.79:8050
16/10/13 16:21:13 INFO input.FileInputFormat: Total input paths to process : 2
16/10/13 16:21:13 INFO mapreduce.JobSubmitter: number of splits:2
16/10/13 16:21:13 INFO Configuration.deprecation: fs.default.name is deprecated. Instead, use fs.defaultFS
16/10/13 16:21:14 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1476366871137_0003
16/10/13 16:21:14 INFO impl.YarnClientImpl: Submitted application application_1476366871137_0003
16/10/13 16:21:14 INFO mapreduce.Job: The url to track the job: http://dev-fiwr-bignode-12.hi.inet:8088/proxy/application_1476366871137_0003/
16/10/13 16:21:14 INFO mapreduce.Job: Running job: job_1476366871137_0003
16/10/13 16:21:19 INFO mapreduce.Job: Job job_1476366871137_0003 running in uber mode : false
16/10/13 16:21:19 INFO mapreduce.Job: map 0% reduce 0%
16/10/13 16:21:23 INFO mapreduce.Job: map 50% reduce 0%
16/10/13 16:21:24 INFO mapreduce.Job: map 100% reduce 0%
16/10/13 16:21:28 INFO mapreduce.Job: map 100% reduce 100%\
6/10/13 16:21:29 INFO mapred.ClientServiceDelegate: Application state is completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server
16/10/13 16:21:29 INFO mapred.ClientServiceDelegate: Application state is completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server
16/10/13 16:21:29 INFO mapred.ClientServiceDelegate: Application state is completed. FinalApplicationStatus=SUCCEEDED. Redirecting to job history server
Exception in thread \"main\" java.io.IOException:
org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException): java.lang.NullPointerException
org.apache.hadoop.mapreduce.v2.hs.HistoryClientService$HSClientProtocolHandler.getTaskAttemptCompletionEvents(HistoryClientService.java:277)
org.apache.hadoop.mapreduce.v2.api.impl.pb.service.MRClientProtocolPBServiceImpl.getTaskAttemptCompletionEvents(MRClientProtocolPBServiceImpl.java:173)
org.apache.hadoop.yarn.proto.MRClientProtocol$MRClientProtocolService$2.callBlockingMethod(MRClientProtocol.java:283)
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAs(Subject.java:415)
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1594)
org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)
org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:334)
org.apache.hadoop.mapred.ClientServiceDelegate.getTaskCompletionEvents(ClientServiceDelegate.java:386)
org.apache.hadoop.mapred.YARNRunner.getTaskCompletionEvents(YARNRunner.java:539)
org.apache.hadoop.mapreduce.Job$5.run(Job.java:668)
org.apache.hadoop.mapreduce.Job$5.run(Job.java:665)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAs(Subject.java:415)
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1594)
org.apache.hadoop.mapreduce.Job.getTaskCompletionEvents(Job.java:665)
org.apache.hadoop.mapreduce.Job.monitorAndPrintJob(Job.java:1366)
org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1306)
dijkstra.adjacencylist.AdjacencyListDriver.jobRun(AdjacencyListDriver.java:53)
dijkstra.adjacencylist.AdjacencyListDriver.run(AdjacencyListDriver.java:31)
org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
dijkstra.launch.LaunchClass.launchAdjMatrix(LaunchClass.java:226)
dijkstra.launch.LaunchClass.main(LaunchClass.java:199)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:606)
org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by:
org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException):
java.lang.NullPointerException
org.apache.hadoop.mapreduce.v2.hs.HistoryClientService$HSClientProtocolHandler.getTaskAttemptCompletionEvents(HistoryClientService.java:277)
...
谷歌搜索了一下，我看到了以下问题:
它们似乎相关。但是，为什么集群到目前为止仍能正常运行？配置没有任何更改，客户端计算机不在安全模式下，HDFS空间使用率约为0.03％...有任何提示吗？并且，如果这与上述问题有关，那么有什么解决方法？
非常感谢，我们将继续为您解答或提供其他信息要求。
最佳答案
根据堆栈跟踪判断，您的问题类似于5703，并且在该错误中指出:
“方法GetTaskAttemptCompletionEventsResponse()通过调用verifyAndGetJob()获取了一个作业，但是它从未检查作业是否为空，这是此问题的根本原因。”
没有使用工作ID的工作查找，但找不到该工作。
在该错误中，它列出了一个场景，在该场景中，作业历史服务器(JHS)被查询完成的作业，但是JHS无法接收该作业的信息。
关于作业终止和作业历史上载似乎存在一些未解决的问题，这些问题使在作业历史上载失败时发生此异常。在错误中，问题是由在完成历史记录上传之前重新启动写入历史记录的节点触发的，或者是由该节点没有将历史记录写入的良好节点触发的。
不幸的是，这里没有其他东西可以帮助您确定导致历史记录上载失败的原因，但这似乎是问题的根本原因。您的作业历史记录服务器没有成功完成的作业的记录。