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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9187) Check if tracer is null before using it
Date Mon, 12 Oct 2015 05:26:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9187?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14952657#comment-14952657
] 

Sangjin Lee commented on HDFS-9187:
-----------------------------------

I also ran into this issue with the HBase mini cluster.

In the latest patch (v.2), the latter change in Globber.java is causing the NullPointerException
in the test failures, and doesn't seem necessary:

{code}
58	    this.tracer = FsTracer.get(fs.getConf());
{code}

> Check if tracer is null before using it
> ---------------------------------------
>
>                 Key: HDFS-9187
>                 URL: https://issues.apache.org/jira/browse/HDFS-9187
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: tracing
>    Affects Versions: 2.8.0
>            Reporter: stack
>            Assignee: Colin Patrick McCabe
>         Attachments: HDFS-9187.001.patch, HDFS-9187.002.patch
>
>
> Saw this where an hbase that has not been updated to htrace-4.0.1 was trying to start:
> {code}
> Oct 1, 5:12:11.861 AM FATAL org.apache.hadoop.hbase.master.HMaster
> Failed to become active master
> java.lang.NullPointerException
> at org.apache.hadoop.fs.Globber.glob(Globber.java:145)
> at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1634)
> at org.apache.hadoop.hbase.util.FSUtils.getTableDirs(FSUtils.java:1372)
> at org.apache.hadoop.hbase.util.FSTableDescriptors.getAll(FSTableDescriptors.java:206)
> at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:619)
> at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:169)
> at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1481)
> at java.lang.Thread.run(Thread.java:745)
> {code}



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