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https://issues.apache.org/jira/browse/YARN-8829?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akshay Agarwal reassigned YARN-8829:
------------------------------------
Assignee: Akshay Agarwal
> Cluster metrics can fail with IndexOutOfBound Exception
> --------------------------------------------------------
>
> Key: YARN-8829
> URL: https://issues.apache.org/jira/browse/YARN-8829
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Akshay Agarwal
> Assignee: Akshay Agarwal
> Priority: Minor
>
> If no sub clusters are available in Router Based Federation Setup ,cluster
> metrics can throw "IndexOutOfBoundException".
> Additional check is required for sub cluster is Empty.
> *Exception details:*
> Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 0,
> Size: 0
> at java.util.ArrayList.rangeCheck(ArrayList.java:653)
> at java.util.ArrayList.get(ArrayList.java:429)
> at
> org.apache.hadoop.yarn.server.router.clientrm.FederationClientInterceptor.invokeConcurrent(FederationClientInterceptor.java:654)
> at
> org.apache.hadoop.yarn.server.router.clientrm.FederationClientInterceptor.getClusterMetrics(FederationClientInterceptor.java:604)
> at
> org.apache.hadoop.yarn.server.router.clientrm.RouterClientRMService.getClusterMetrics(RouterClientRMService.java:232)
> at
> org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getClusterMetrics(ApplicationClientProtocolPBServiceImpl.java:253)
> at
> org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:585)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:523)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:991)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:872)
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