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From "Xiaoyu Yao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8179) DFSClient#getServerDefaults returns null within 1 hour of system start
Date Mon, 20 Apr 2015 21:59:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xiaoyu Yao updated HDFS-8179:
-----------------------------
    Attachment: HDFS-9179.dal.patch

Attach the Dal patch.

> DFSClient#getServerDefaults returns null within 1 hour of system start
> ----------------------------------------------------------------------
>
>                 Key: HDFS-8179
>                 URL: https://issues.apache.org/jira/browse/HDFS-8179
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Xiaoyu Yao
>            Assignee: Xiaoyu Yao
>            Priority: Blocker
>         Attachments: HDFS-8179.00.patch, HDFS-8179.01.patch, HDFS-9179.dal.patch
>
>
> We recently hit NPE during Ambari Oozie service check. The failed hdfs command is below.
It repros sometimes and then go away after the cluster runs for a while.
> {code}
> [ambari-qa@c6401 ~]$ hadoop --config /etc/hadoop/conf fs -rm -r /user/ambari-qa/mapredsmokeoutput
> rm: Failed to get server trash configuration: null. Consider using -skipTrash option
> {code}
> With additional tracing, the failure was located to the following stack.
> {code}
> 15/04/17 20:57:12 DEBUG fs.Trash: Failed to get server trash configuration
> java.lang.NullPointerException
> 	at org.apache.hadoop.fs.Trash.moveToAppropriateTrash(Trash.java:86)
> 	at org.apache.hadoop.fs.shell.Delete$Rm.moveToTrash(Delete.java:117)
> 	at org.apache.hadoop.fs.shell.Delete$Rm.processPath(Delete.java:104)
> 	at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:321)
> 	at org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:293)
> 	at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:275)
> 	at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:259)
> 	at org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:205)
> 	at org.apache.hadoop.fs.shell.Command.run(Command.java:166)
> 	at org.apache.hadoop.fs.FsShell.run(FsShell.java:287)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
> 	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
> 	at org.apache.hadoop.fs.FsShell.main(FsShell.java:340)
> rm: Failed to get server trash configuration: null. Consider using -skipTrash option
> {code}



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