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Posted to common-user@hadoop.apache.org by Qingling Wang <wa...@cs.rpi.edu> on 2010/03/09 05:23:24 UTC

No locaks available

Hi,

We're getting the following errosr when starting up hadoop, actually when
inputing bin/hadoop namenode -format on the cluster. So we cannot start
name node and we are running version 0.20.2 of hadoop.

Could anyone tell where the errors come out? What's the meaning of "No
locks available" and how to solve it?


10/03/06 22:39:44 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = elpis.mri.cs.rpi.edu/128.213.60.15
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 0.20.2
STARTUP_MSG:   build =
https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20 -r
911707; compiled by 'chrisdo' on Fri Feb 19 08:07:34 UTC 2010
************************************************************/
Re-format filesystem in /projects/wcl-nobackup/hadoop/hdfs/name ? (Y or N) Y
10/03/06 22:39:46 INFO namenode.FSNamesystem:
fsOwner=wangq9,wangq9,course_csci4210,wwc
10/03/06 22:39:46 INFO namenode.FSNamesystem: supergroup=supergroup
10/03/06 22:39:46 INFO namenode.FSNamesystem: isPermissionEnabled=true
10/03/06 22:39:46 INFO common.Storage: java.io.IOException: No locks
available
        at sun.nio.ch.FileChannelImpl.lock0(Native Method)
        at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:881)
        at java.nio.channels.FileChannel.tryLock(FileChannel.java:962)
        at
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:527)
        at
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:505)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1087)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)

10/03/06 22:39:46 ERROR namenode.NameNode: java.io.IOException: No locks
available
        at sun.nio.ch.FileChannelImpl.lock0(Native Method)
        at sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:881)
        at java.nio.channels.FileChannel.tryLock(FileChannel.java:962)
        at
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:527)
        at
org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:505)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1087)
        at
org.apache.hadoop.hdfs.server.namenode.FSImage.format(FSImage.java:1110)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.format(NameNode.java:856)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:948)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:965)

10/03/06 22:39:46 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at elpis.mri.cs.rpi.edu/128.213.60.15
************************************************************/


Thanks
Qingling Wang

Re: No locaks available

Posted by Wang Xu <gn...@gmail.com>.
On Tue, Mar 9, 2010 at 12:23 PM, Qingling Wang <wa...@cs.rpi.edu> wrote:
> 10/03/06 22:39:46 INFO common.Storage: java.io.IOException: No locks
> available

Which local filesystem are you using for namedir?

-- 
Wang Xu