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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3408) BKJM : Namenode format fails, if there is no BK root
Date Mon, 04 Jun 2012 10:33:23 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3408?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13288481#comment-13288481
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Uma Maheswara Rao G commented on HDFS-3408:
-------------------------------------------

{code}
String[] zkAvailablePath = conf.getStrings(BKJM_ZK_LEDGERS_AVAILABLE_PATH,
+        BKJM_ZK_LEDGERS_AVAILABLE_PATH_DEFAULT);
+
+    String[] zkAvailFullPath = StringUtils.split(zkAvailablePath[0], '/');
{code}
Why you are getting the zkAvailablePath using getString and using only zkAvailablePath[0]?
Instead you can use get method right?
                
> BKJM : Namenode format fails, if there is no BK root
> ----------------------------------------------------
>
>                 Key: HDFS-3408
>                 URL: https://issues.apache.org/jira/browse/HDFS-3408
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>            Priority: Minor
>         Attachments: BOOKKEEPER-255.patch, HDFS-3408.1.patch, HDFS-3408.2.patch
>
>
> +scenario:+
> 1) /ledgers/available zNode is not created in ZooKeeper.
> 2) Apply NN formatting using : hadoop namenode -format
> Namenode formatting has dependency with the BookKeeper client and is throwing the following
exception.
> {noformat}
> 12/05/10 16:41:57 ERROR namenode.NameNode: Exception in namenode join
> java.lang.IllegalArgumentException: Unable to construct journal, bookkeeper://10.18.40.155:2183;10.18.40.155:2182;10.18.40.155:2181/NN
>         at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createJournal(FSEditLog.java:1226)
>         at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initJournals(FSEditLog.java:242)
>         at org.apache.hadoop.hdfs.server.namenode.FSEditLog.initSharedJournalsForRead(FSEditLog.java:223)
>         at org.apache.hadoop.hdfs.server.namenode.FSImage.<init>(FSImage.java:134)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:718)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1091)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1191)
> Caused by: java.lang.reflect.InvocationTargetException
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>         at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>         at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createJournal(FSEditLog.java:1224)
>         ... 6 more
> Caused by: java.io.IOException: Error initializing zk
>         at org.apache.hadoop.contrib.bkjournal.BookKeeperJournalManager.<init>(BookKeeperJournalManager.java:191)
>         ... 11 more
> Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode
>         at org.apache.zookeeper.KeeperException.create(KeeperException.java:111)
>         at org.apache.bookkeeper.client.BookieWatcher.readBookiesBlocking(BookieWatcher.java:140)
>         at org.apache.bookkeeper.client.BookKeeper.<init>(BookKeeper.java:177)
>         at org.apache.bookkeeper.client.BookKeeper.<init>(BookKeeper.java:147)
>         at org.apache.hadoop.contrib.bkjournal.BookKeeperJournalManager.<init>(BookKeeperJournalManager.java:189)
>         ... 11 more
> {noformat}

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