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From "Anu Engineer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-10540) The CLI error message for disk balancer is not enabled is not clear.
Date Fri, 17 Jun 2016 23:28:05 GMT

     [ https://issues.apache.org/jira/browse/HDFS-10540?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anu Engineer updated HDFS-10540:
--------------------------------
    Status: Patch Available  (was: Open)

> The CLI error message for disk balancer is not enabled is not clear.
> --------------------------------------------------------------------
>
>                 Key: HDFS-10540
>                 URL: https://issues.apache.org/jira/browse/HDFS-10540
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode
>    Affects Versions: HDFS-1312
>            Reporter: Lei (Eddy) Xu
>            Assignee: Anu Engineer
>         Attachments: HDFS-10540-HDFS-1312.001.patch
>
>
> When running the {{hdfs diskbalancer}} against a DN whose disk balancer feature is not
enabled, it reports:
> {code}
> $ hdfs diskbalancer -plan 127.0.0.1 -uri hdfs://localhost
> 16/06/16 18:03:29 WARN util.NativeCodeLoader: Unable to load native-hadoop library for
your platform... using builtin-java classes where applicable
> Internal error, Unable to create JSON string.
> 	at org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getVolumeNames(DiskBalancer.java:260)
> 	at org.apache.hadoop.hdfs.server.datanode.DataNode.getDiskBalancerSetting(DataNode.java:3105)
> 	at org.apache.hadoop.hdfs.protocolPB.ClientDatanodeProtocolServerSideTranslatorPB.getDiskBalancerSetting(ClientDatanodeProtocolServerSideTranslatorPB.java:359)
> 	at org.apache.hadoop.hdfs.protocol.proto.ClientDatanodeProtocolProtos$ClientDatanodeProtocolService$2.callBlockingMethod(ClientDatanodeProtocolProtos.java:17515)
> 	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
> 	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2086)
> 	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2082)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at javax.security.auth.Subject.doAs(Subject.java:415)
> 	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1693)
> 	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2080)
> Caused by: org.apache.hadoop.hdfs.server.diskbalancer.DiskBalancerException: Disk Balancer
is not enabled.
> 	at org.apache.hadoop.hdfs.server.datanode.DiskBalancer.checkDiskBalancerEnabled(DiskBalancer.java:293)
> 	at org.apache.hadoop.hdfs.server.datanode.DiskBalancer.getVolumeNames(DiskBalancer.java:251)
> 	... 11 more
> {code}
> We should not directly throw IOE to the user. And it should explicitly explain the reason
that the operation fails.



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