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Re: Filesystem error
The UGI preface is just reporting who you are when the exception occurred.  The issue isn't permissions but rather when you stopped the services it can't connect to localhost:8020 because nothing is listening on 8020, hence the "connection refused".  I think you need to force the NN into safe mode rather than stop the services.

Daryn

On Mar 29, 2013, at 12:54 AM, Mohit Vadhera wrote:

> Hi,
>
> I have filsystem error. when i run fsck to move corrupted blocks i get the
> following error after stopping services i get the below error. but if i
> don't start the services and run the fsck command the corrupted block
> doesn't move.  I am not getting this Usergroupinformation error. it is
> looking permission error. Can any body fix it . It is an urgent issue on my
> hadoop machine. It is a standalone cluster configured using the below link
>
> https://ccp.cloudera.com/display/CDH4DOC/Installing+CDH4+on+a+Single+Linux+Node+in+Pseudo-distributed+Mode
>
> Error
> ==================================================>
> # sudo -u hdfs  hadoop fsck / -move
> DEPRECATED: Use of this script to execute hdfs command is deprecated.
> Instead use the hdfs command for it.
>
> 13/03/29 01:20:20 ERROR security.UserGroupInformation:
> PriviledgedActionException as:hdfs (auth:SIMPLE)
> cause:java.net.ConnectException: Call From OPERA-MAST1.ny.os.local/
> 172.20.3.119 to localhost:8020 failed on connection exception:
> java.net.ConnectException: Connection refused; For more details see:
> http://wiki.apache.org/hadoop/ConnectionRefused
> Exception in thread "main" java.net.ConnectException: Call From
> OPERA-MAST1.ny.os.local/172.20.3.119 to localhost:8020 failed on connection
> exception: java.net.ConnectException: Connection refused; For more details
> see:  http://wiki.apache.org/hadoop/ConnectionRefused
>        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:721)
>        at org.apache.hadoop.ipc.Client.call(Client.java:1228)
>        at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)
>        at $Proxy9.getFileInfo(Unknown Source)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)
>        at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)
>        at $Proxy9.getFileInfo(Unknown Source)
>        at
> org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:628)
>        at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1507)
>        at
> org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:783)
>        at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:1257)
>        at org.apache.hadoop.hdfs.HAUtil.getAddressOfActive(HAUtil.java:298)
>        at
> org.apache.hadoop.hdfs.tools.DFSck.getCurrentNamenodeAddress(DFSck.java:229)
>        at org.apache.hadoop.hdfs.tools.DFSck.doWork(DFSck.java:235)
>        at org.apache.hadoop.hdfs.tools.DFSck.access$000(DFSck.java:71)
>        at org.apache.hadoop.hdfs.tools.DFSck$1.run(DFSck.java:134)
>        at org.apache.hadoop.hdfs.tools.DFSck$1.run(DFSck.java:131)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at javax.security.auth.Subject.doAs(Subject.java:396)
>        at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1332)
>        at org.apache.hadoop.hdfs.tools.DFSck.run(DFSck.java:130)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
>        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
>        at org.apache.hadoop.hdfs.tools.DFSck.main(DFSck.java:316)
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB