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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9187) Check if tracer is null before using it
Date Thu, 01 Oct 2015 17:28:26 GMT
stack created HDFS-9187:
---------------------------

             Summary: 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


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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