[jira] [Commented] (YARN-7007) NPE in RM while using YarnClient.getApplications()
[ https://issues.apache.org/jira/browse/YARN-7007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17012913#comment-17012913 ] Yang Wang commented on YARN-7007: - [~Tao Yang] Cool, many thanks. > NPE in RM while using YarnClient.getApplications() > -- > > Key: YARN-7007 > URL: https://issues.apache.org/jira/browse/YARN-7007 > Project: Hadoop YARN > Issue Type: Bug >Affects Versions: 2.7.2 >Reporter: Lingfeng Su >Assignee: Lingfeng Su >Priority: Major > Labels: patch > Fix For: 2.9.0, 3.0.0-beta1, 2.8.6 > > Attachments: YARN-7007.001.patch > > > {code:java} > java.lang.NullPointerException: java.lang.NullPointerException > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptMetrics.getAggregateAppResourceUsage(RMAppAttemptMetrics.java:118) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getApplicationResourceUsageReport(RMAppAttemptImpl.java:857) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:629) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.verifyAndCreateAppReport(ClientRMService.java:972) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:898) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:734) > at > org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplications(ApplicationClientProtocolPBServiceImpl.java:239) > at > org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:441) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:973) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2202) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2198) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1738) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2196) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateRuntimeException(RPCUtil.java:85) > at > org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:122) > at > org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplications(ApplicationClientProtocolPBClientImpl.java:254) > at sun.reflect.GeneratedMethodAccessor731.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > 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.$Proxy161.getApplications(Unknown Source) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:479) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:456) > {code} > When I use YarnClient.getApplications() to get all applications of RM, > Occasionally, it throw a NPE problem. > {code:java} > RMAppAttempt currentAttempt = rmContext.getRMApps() >.get(attemptId.getApplicationId()).getCurrentAppAttempt(); > {code} > if the application id is not in ConcurrentMap > getRMApps(), it may throw NPE problem. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org
[jira] [Commented] (YARN-7007) NPE in RM while using YarnClient.getApplications()
[ https://issues.apache.org/jira/browse/YARN-7007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17012615#comment-17012615 ] Tao Yang commented on YARN-7007: Already cherry-picked this fix to branch-2.8 > NPE in RM while using YarnClient.getApplications() > -- > > Key: YARN-7007 > URL: https://issues.apache.org/jira/browse/YARN-7007 > Project: Hadoop YARN > Issue Type: Bug >Affects Versions: 2.7.2 >Reporter: Lingfeng Su >Assignee: Lingfeng Su >Priority: Major > Labels: patch > Fix For: 2.9.0, 3.0.0-beta1, 2.8.6 > > Attachments: YARN-7007.001.patch > > > {code:java} > java.lang.NullPointerException: java.lang.NullPointerException > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptMetrics.getAggregateAppResourceUsage(RMAppAttemptMetrics.java:118) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getApplicationResourceUsageReport(RMAppAttemptImpl.java:857) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:629) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.verifyAndCreateAppReport(ClientRMService.java:972) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:898) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:734) > at > org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplications(ApplicationClientProtocolPBServiceImpl.java:239) > at > org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:441) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:973) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2202) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2198) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1738) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2196) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateRuntimeException(RPCUtil.java:85) > at > org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:122) > at > org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplications(ApplicationClientProtocolPBClientImpl.java:254) > at sun.reflect.GeneratedMethodAccessor731.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > 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.$Proxy161.getApplications(Unknown Source) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:479) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:456) > {code} > When I use YarnClient.getApplications() to get all applications of RM, > Occasionally, it throw a NPE problem. > {code:java} > RMAppAttempt currentAttempt = rmContext.getRMApps() >.get(attemptId.getApplicationId()).getCurrentAppAttempt(); > {code} > if the application id is not in ConcurrentMap > getRMApps(), it may throw NPE problem. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org
[jira] [Commented] (YARN-7007) NPE in RM while using YarnClient.getApplications()
[ https://issues.apache.org/jira/browse/YARN-7007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17012554#comment-17012554 ] Tao Yang commented on YARN-7007: [~fly_in_gis], thanks for the feedback, I will cherry-pick this fix to 2.8 later. > NPE in RM while using YarnClient.getApplications() > -- > > Key: YARN-7007 > URL: https://issues.apache.org/jira/browse/YARN-7007 > Project: Hadoop YARN > Issue Type: Bug >Affects Versions: 2.7.2 >Reporter: Lingfeng Su >Assignee: Lingfeng Su >Priority: Major > Labels: patch > Fix For: 2.9.0, 3.0.0-beta1 > > Attachments: YARN-7007.001.patch > > > {code:java} > java.lang.NullPointerException: java.lang.NullPointerException > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptMetrics.getAggregateAppResourceUsage(RMAppAttemptMetrics.java:118) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getApplicationResourceUsageReport(RMAppAttemptImpl.java:857) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:629) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.verifyAndCreateAppReport(ClientRMService.java:972) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:898) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:734) > at > org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplications(ApplicationClientProtocolPBServiceImpl.java:239) > at > org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:441) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:973) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2202) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2198) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1738) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2196) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateRuntimeException(RPCUtil.java:85) > at > org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:122) > at > org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplications(ApplicationClientProtocolPBClientImpl.java:254) > at sun.reflect.GeneratedMethodAccessor731.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > 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.$Proxy161.getApplications(Unknown Source) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:479) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:456) > {code} > When I use YarnClient.getApplications() to get all applications of RM, > Occasionally, it throw a NPE problem. > {code:java} > RMAppAttempt currentAttempt = rmContext.getRMApps() >.get(attemptId.getApplicationId()).getCurrentAppAttempt(); > {code} > if the application id is not in ConcurrentMap > getRMApps(), it may throw NPE problem. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org
[jira] [Commented] (YARN-7007) NPE in RM while using YarnClient.getApplications()
[ https://issues.apache.org/jira/browse/YARN-7007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17012529#comment-17012529 ] Yang Wang commented on YARN-7007: - [~cheersyang] [~Tao Yang] We come across the same problem in FLINK-15534 and i think many users are using Flink with bundled hadoop-2.8.x. It will be very good if we could backport this fix to 2.8 and release in 2.8.6. Could you help with this? > NPE in RM while using YarnClient.getApplications() > -- > > Key: YARN-7007 > URL: https://issues.apache.org/jira/browse/YARN-7007 > Project: Hadoop YARN > Issue Type: Bug >Affects Versions: 2.7.2 >Reporter: Lingfeng Su >Assignee: Lingfeng Su >Priority: Major > Labels: patch > Fix For: 2.9.0, 3.0.0-beta1 > > Attachments: YARN-7007.001.patch > > > {code:java} > java.lang.NullPointerException: java.lang.NullPointerException > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptMetrics.getAggregateAppResourceUsage(RMAppAttemptMetrics.java:118) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getApplicationResourceUsageReport(RMAppAttemptImpl.java:857) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:629) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.verifyAndCreateAppReport(ClientRMService.java:972) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:898) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:734) > at > org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplications(ApplicationClientProtocolPBServiceImpl.java:239) > at > org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:441) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:973) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2202) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2198) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1738) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2196) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateRuntimeException(RPCUtil.java:85) > at > org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:122) > at > org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplications(ApplicationClientProtocolPBClientImpl.java:254) > at sun.reflect.GeneratedMethodAccessor731.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > 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.$Proxy161.getApplications(Unknown Source) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:479) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:456) > {code} > When I use YarnClient.getApplications() to get all applications of RM, > Occasionally, it throw a NPE problem. > {code:java} > RMAppAttempt currentAttempt = rmContext.getRMApps() >.get(attemptId.getApplicationId()).getCurrentAppAttempt(); > {code} > if the application id is not in ConcurrentMap > getRMApps(), it may throw NPE problem. -- This message was sent by Atlassian Jira (v8.3.4#803005) - To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org
[jira] [Commented] (YARN-7007) NPE in RM while using YarnClient.getApplications()
[ https://issues.apache.org/jira/browse/YARN-7007?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=16133130#comment-16133130 ] Hudson commented on YARN-7007: -- ABORTED: Integrated in Jenkins build Hadoop-trunk-Commit #12211 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/12211/]) YARN-7007. NPE in RM while using YarnClient.getApplications(). (bibinchundatt: rev e05fa3451db343c0d22496b332910874b6be5b7f) * (edit) hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/attempt/RMAppAttemptMetrics.java > NPE in RM while using YarnClient.getApplications() > -- > > Key: YARN-7007 > URL: https://issues.apache.org/jira/browse/YARN-7007 > Project: Hadoop YARN > Issue Type: Bug >Affects Versions: 2.7.2 >Reporter: Lingfeng Su >Assignee: Lingfeng Su > Labels: patch > Fix For: 2.9.0, 3.0.0-beta1 > > Attachments: YARN-7007.001.patch > > > {code:java} > java.lang.NullPointerException: java.lang.NullPointerException > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptMetrics.getAggregateAppResourceUsage(RMAppAttemptMetrics.java:118) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttemptImpl.getApplicationResourceUsageReport(RMAppAttemptImpl.java:857) > at > org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMAppImpl.createAndGetApplicationReport(RMAppImpl.java:629) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.verifyAndCreateAppReport(ClientRMService.java:972) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:898) > at > org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getApplications(ClientRMService.java:734) > at > org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getApplications(ApplicationClientProtocolPBServiceImpl.java:239) > at > org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:441) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:973) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2202) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2198) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:422) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1738) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2196) > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateException(RPCUtil.java:53) > at > org.apache.hadoop.yarn.ipc.RPCUtil.instantiateRuntimeException(RPCUtil.java:85) > at > org.apache.hadoop.yarn.ipc.RPCUtil.unwrapAndThrowException(RPCUtil.java:122) > at > org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getApplications(ApplicationClientProtocolPBClientImpl.java:254) > at sun.reflect.GeneratedMethodAccessor731.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:498) > 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.$Proxy161.getApplications(Unknown Source) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:479) > at > org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getApplications(YarnClientImpl.java:456) > {code} > When I use YarnClient.getApplications() to get all applications of RM, > Occasionally, it throw a NPE problem. > {code:java} > RMAppAttempt currentAttempt = rmContext.getRMApps() >.get(attemptId.getApplicationId()).getCurrentAppAttempt(); > {code} > if the application id is not in ConcurrentMap> getRMApps(), it may throw NPE problem. -- This message was sent by Atlassian JIRA (v6.4.14#64029)