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https://issues.apache.org/jira/browse/HADOOP-3027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581922#action_12581922
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Hudson commented on HADOOP-3027:
--------------------------------
Integrated in Hadoop-trunk #441 (See
[http://hudson.zones.apache.org/hudson/job/Hadoop-trunk/441/])
> JobTracker shuts down during initialization if the NameNode is down
> -------------------------------------------------------------------
>
> Key: HADOOP-3027
> URL: https://issues.apache.org/jira/browse/HADOOP-3027
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs, mapred
> Affects Versions: 0.16.0
> Reporter: Amareshwari Sriramadasu
> Priority: Blocker
> Fix For: 0.16.2, 0.17.0
>
> Attachments: patch-3027.txt
>
>
> When the JobTracker is initializing and trying to connect to the NameNode, it
> shuts itself down if the NameNode is unreachable for more than one iteration
> of the connect loop. It can be easily reproduced if the JobTracker is started
> before the NameNode is started. The JobTracker will shut itself down in a few
> seconds. The problem seems to be with adding a shutdown hook in the
> FileSystem in the case where the same hook has been added before.
> 2008-03-17 09:45:20,979 INFO org.apache.hadoop.mapred.JobTracker: JobTracker
> up at: 9101
> 2008-03-17 09:45:20,979 INFO org.apache.hadoop.mapred.JobTracker: JobTracker
> webserver: 50030
> 2008-03-17 09:45:21,374 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 1 time(s).
> 2008-03-17 09:45:22,377 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 2 time(s).
> 2008-03-17 09:45:23,380 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 3 time(s).
> 2008-03-17 09:45:24,383 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 4 time(s).
> 2008-03-17 09:45:25,385 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 5 time(s).
> 2008-03-17 09:45:26,388 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 6 time(s).
> 2008-03-17 09:45:27,391 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 7 time(s).
> 2008-03-17 09:45:28,394 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 8 time(s).
> 2008-03-17 09:45:29,397 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 9 time(s).
> 2008-03-17 09:45:30,402 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: localhost/127.0.0.1:9000. Already tried 10 time(s).
> 2008-03-17 09:45:31,406 INFO org.apache.hadoop.mapred.JobTracker: problem
> cleaning system directory: /tmp/hadoop/mapred/system
> java.net.ConnectException: Connection refused
> at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
> at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown Source)
> at sun.nio.ch.SocketAdaptor.connect(Unknown Source)
> at
> org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:174)
> at org.apache.hadoop.ipc.Client.getConnection(Client.java:623)
> at org.apache.hadoop.ipc.Client.call(Client.java:546)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:211)
> at org.apache.hadoop.dfs.$Proxy4.getProtocolVersion(Unknown Source)
> at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:312)
> at org.apache.hadoop.dfs.DFSClient.createRPCNamenode(DFSClient.java:94)
> at org.apache.hadoop.dfs.DFSClient.<init>(DFSClient.java:158)
> at
> org.apache.hadoop.dfs.DistributedFileSystem.initialize(DistributedFileSystem.java:69)
> at
> org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1255)
> at org.apache.hadoop.fs.FileSystem.access$400(FileSystem.java:53)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1272)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:191)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:96)
> at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:702)
> at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:135)
> at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:2266)
> 2008-03-17 09:45:41,410 FATAL org.apache.hadoop.mapred.JobTracker:
> java.lang.IllegalArgumentException: Hook previously registered
> at java.lang.ApplicationShutdownHooks.add(Unknown Source)
> at java.lang.Runtime.addShutdownHook(Unknown Source)
> at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1269)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:191)
> at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:96)
> at org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:702)
> at org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:135)
> at org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:2266)
> 2008-03-17 09:45:41,412 INFO org.apache.hadoop.mapred.JobTracker:
> SHUTDOWN_MSG:
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