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From Harsh J <ha...@cloudera.com>
Subject Re: namenode instantiation error
Date Fri, 10 Aug 2012 12:04:34 GMT
You do not need SSH generally. See
http://wiki.apache.org/hadoop/FAQ#Does_Hadoop_require_SSH.3F

1. Your original issue is that you are starting the NameNode as the
completely wrong user. Start it as the "hdfs" user, in a packaged
environment. Run "sudo -u hdfs hadoop namenode" to start it in
foreground, or simply run "sudo service hadoop-0.20-namenode start" to
start it in the background. This will fix it up for you.

2. Your format was aborted cause in 0.20.x/1.x, the input required was
case-sensitive, while in 2.x onwards the input is non-case-sensitive.
So if you typed "Y" instead of "y", it would have succeeded.

HTH!

On Fri, Aug 10, 2012 at 4:35 PM, anand sharma <anand2sharma@gmail.com> wrote:
> And are permission for that file which is causing problem..
>
> [root@localhost hive]# ls -l
> /var/lib/hadoop-0.20/cache/hadoop/dfs/name/in_use.lock
> -rwxrwxrwx. 1 hdfs hdfs 0 Aug 10 21:23
> /var/lib/hadoop-0.20/cache/hadoop/dfs/name/in_use.lock
>
>
>
>
>
> On Thu, Aug 9, 2012 at 3:46 PM, anand sharma <anand2sharma@gmail.com> wrote:
>>
>> Hi, i am just learning the Hadoop and i am setting the development
>> environment with CDH3 pseudo distributed mode without any ssh cofiguration
>> in CentOS 6.2 . i can run the sample programs as usual but when i try and
>> run namenode this is the error it logs...
>>
>> [hive@localhost ~]$ hadoop namenode
>> 12/08/09 20:56:57 INFO namenode.NameNode: STARTUP_MSG:
>> /************************************************************
>> STARTUP_MSG: Starting NameNode
>> STARTUP_MSG:   host = localhost.localdomain/127.0.0.1
>> STARTUP_MSG:   args = []
>> STARTUP_MSG:   version = 0.20.2-cdh3u4
>> STARTUP_MSG:   build =
>> file:///data/1/tmp/topdir/BUILD/hadoop-0.20.2-cdh3u4 -r
>> 214dd731e3bdb687cb55988d3f47dd9e248c5690; compiled by 'root' on Mon May  7
>> 14:01:59 PDT 2012
>> ************************************************************/
>> 12/08/09 20:56:57 INFO jvm.JvmMetrics: Initializing JVM Metrics with
>> processName=NameNode, sessionId=null
>> 12/08/09 20:56:57 INFO metrics.NameNodeMetrics: Initializing
>> NameNodeMeterics using context
>> object:org.apache.hadoop.metrics.spi.NoEmitMetricsContext
>> 12/08/09 20:56:57 INFO util.GSet: VM type       = 64-bit
>> 12/08/09 20:56:57 INFO util.GSet: 2% max memory = 17.77875 MB
>> 12/08/09 20:56:57 INFO util.GSet: capacity      = 2^21 = 2097152 entries
>> 12/08/09 20:56:57 INFO util.GSet: recommended=2097152, actual=2097152
>> 12/08/09 20:56:57 INFO namenode.FSNamesystem: fsOwner=hive (auth:SIMPLE)
>> 12/08/09 20:56:57 INFO namenode.FSNamesystem: supergroup=supergroup
>> 12/08/09 20:56:57 INFO namenode.FSNamesystem: isPermissionEnabled=false
>> 12/08/09 20:56:57 INFO namenode.FSNamesystem:
>> dfs.block.invalidate.limit=1000
>> 12/08/09 20:56:57 INFO namenode.FSNamesystem: isAccessTokenEnabled=false
>> accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
>> 12/08/09 20:56:57 INFO metrics.FSNamesystemMetrics: Initializing
>> FSNamesystemMetrics using context
>> object:org.apache.hadoop.metrics.spi.NoEmitMetricsContext
>> 12/08/09 20:56:57 ERROR namenode.FSNamesystem: FSNamesystem initialization
>> failed.
>> java.io.FileNotFoundException:
>> /var/lib/hadoop-0.20/cache/hadoop/dfs/name/in_use.lock (Permission denied)
>> at java.io.RandomAccessFile.open(Native Method)
>> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:614)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:591)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.analyzeStorage(Storage.java:449)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:304)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:110)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:372)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:335)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:271)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:467)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1330)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1339)
>> 12/08/09 20:56:57 ERROR namenode.NameNode: java.io.FileNotFoundException:
>> /var/lib/hadoop-0.20/cache/hadoop/dfs/name/in_use.lock (Permission denied)
>> at java.io.RandomAccessFile.open(Native Method)
>> at java.io.RandomAccessFile.<init>(RandomAccessFile.java:216)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.tryLock(Storage.java:614)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.lock(Storage.java:591)
>> at
>> org.apache.hadoop.hdfs.server.common.Storage$StorageDirectory.analyzeStorage(Storage.java:449)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:304)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSDirectory.loadFSImage(FSDirectory.java:110)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.initialize(FSNamesystem.java:372)
>> at
>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.<init>(FSNamesystem.java:335)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:271)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:467)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1330)
>> at
>> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1339)
>>
>> 12/08/09 20:56:57 INFO namenode.NameNode: SHUTDOWN_MSG:
>> /************************************************************
>> SHUTDOWN_MSG: Shutting down NameNode at localhost.localdomain/127.0.0.1
>> ************************************************************/
>>
>>
>



-- 
Harsh J

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