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https://issues.apache.org/jira/browse/HADOOP-14207?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15984147#comment-15984147
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Surendra Singh Lilhore commented on HADOOP-14207:
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Thansk [~Naganarasimha].
bq. Issue is applicable to 2.8.1 too right ?
Yes, you're right. [~xyao] can you commit this in 2.8.1 branch also ?
> "dfsadmin -refreshCallQueue" fails with DecayRpcScheduler
> ---------------------------------------------------------
>
> Key: HADOOP-14207
> URL: https://issues.apache.org/jira/browse/HADOOP-14207
> Project: Hadoop Common
> Issue Type: Bug
> Components: rpc-server
> Reporter: Surendra Singh Lilhore
> Assignee: Surendra Singh Lilhore
> Priority: Blocker
> Fix For: 2.9.0, 3.0.0-alpha3
>
> Attachments: HADOOP-14207.001.patch, HADOOP-14207.002.patch,
> HADOOP-14207.003.patch, HADOOP-14207.004.patch, HADOOP-14207.005.patch,
> HADOOP-14207.006.patch
>
>
> {noformat}
> java.lang.RuntimeException: org.apache.hadoop.ipc.DecayRpcScheduler could not
> be constructed.
> at
> org.apache.hadoop.ipc.CallQueueManager.createScheduler(CallQueueManager.java:89)
> at
> org.apache.hadoop.ipc.CallQueueManager.swapQueue(CallQueueManager.java:260)
> at org.apache.hadoop.ipc.Server.refreshCallQueue(Server.java:650)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.refreshCallQueue(NameNodeRpcServer.java:1582)
> at
> org.apache.hadoop.ipc.protocolPB.RefreshCallQueueProtocolServerSideTranslatorPB.refreshCallQueue(RefreshCallQueueProtocolServerSideTranslatorPB.java:49)
> at
> org.apache.hadoop.ipc.proto.RefreshCallQueueProtocolProtos$RefreshCallQueueProtocolService$2.callBlockingMethod(RefreshCallQueueProtocolProtos.java:769)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:447)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:989)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:845)
> at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:788)
> 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:1807)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2455)
> Caused by: org.apache.hadoop.metrics2.MetricsException: Metrics source
> DecayRpcSchedulerMetrics2.ipc.65110 already exists!
> at
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.newSourceName(DefaultMetricsSystem.java:144)
> at
> org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.sourceName(DefaultMetricsSystem.java:117)
> {noformat}
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