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From "Karthik Palanisamy (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-10719) In HA, Namenode is failed to start If any of the Quorum hostname is unresolved.
Date Wed, 03 Aug 2016 15:32:20 GMT
Karthik Palanisamy created HDFS-10719:
-----------------------------------------

             Summary: In HA, Namenode is failed to start If any of the Quorum hostname is
unresolved.
                 Key: HDFS-10719
                 URL: https://issues.apache.org/jira/browse/HDFS-10719
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: journal-node, namenode
         Environment: HDP-2.4
            Reporter: Karthik Palanisamy


2016-08-03 02:53:53,760 ERROR namenode.NameNode (NameNode.java:main(1712)) - Failed to start
namenode.
java.lang.IllegalArgumentException: Unable to construct journal, qjournal://xxxx1:8485;xxxx2:8485;xxxx3:8485/shva
        at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createJournal(FSEditLog.java:1637)
        at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initJournals(FSEditLog.java:282)
        at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initSharedJournalsForRead(FSEditLog.java:260)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.initEditLog(FSImage.java:789)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:634)
        at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:294)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:983)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:688)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:662)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:726)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:951)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:935)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1641)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1707)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
        at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createJournal(FSEditLog.java:1635)
        ... 13 more
Caused by: java.lang.NullPointerException
        at org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannelMetrics.getName(IPCLoggerChannelMetrics.java:107)
        at org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannelMetrics.create(IPCLoggerChannelMetrics.java:91)
        at org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannel.<init>(IPCLoggerChannel.java:178)
        at org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannel$1.createLogger(IPCLoggerChannel.java:156)
        at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.createLoggers(QuorumJournalManager.java:367)
        at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.createLoggers(QuorumJournalManager.java:149)
        at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.<init>(QuorumJournalManager.java:116)
        at org.apache.hadoop.hdfs.qjournal.client.QuorumJournalManager.<init>(QuorumJournalManager.java:105)
        ... 18 more
2016-08-03 02:53:53,765 INFO  util.ExitUtil (ExitUtil.java:terminate(124)) - Exiting with
status 1
2016-08-03 02:53:53,768 INFO  namenode.NameNode (LogAdapter.java:info(47)) - SHUTDOWN_MSG:

and the *failover* is not successful.

I have attached the patch, It allows the Namenode to start if the majority of the Quorums
are resolvable and it throws warning message for the quorum which is not resolvable.





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