hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Denny Ye (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3471) NullPointerException when NameNode is closing
Date Mon, 28 May 2012 09:33:23 GMT
Denny Ye created HDFS-3471:
------------------------------

             Summary: NullPointerException when NameNode is closing
                 Key: HDFS-3471
                 URL: https://issues.apache.org/jira/browse/HDFS-3471
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: name-node
    Affects Versions: 1.0.0
            Reporter: Denny Ye
            Priority: Minor


In local environment, there is NPE when NameNode is closing. 
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2012-05-28 08:54:33,139 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 9000, call
blockReceived(DatanodeRegistration(xx.xxx.xxx.xxx:50010, storageID=DS-1391415252-xx.xxx.xxx.xxx-50010-1330957852052,
infoPort=50075, ipcPort=50020), [Lorg.apache.hadoop.hdfs.protocol.Block;@6639be68, [Ljava.lang.String;@5903d246)
from xx.xxx.xxx.xxx:17022: error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
        at org.apache.hadoop.hdfs.server.namenode.BlocksMap.getStoredBlock(BlocksMap.java:408)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.addStoredBlock(FSNamesystem.java:3313)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.blockReceived(FSNamesystem.java:3870)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.blockReceived(NameNode.java:962)
        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.ipc.RPC$Server.call(RPC.java:557)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1434)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1430)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1428)

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

I tracked the source code. It may be caused by the FSNameSystem closed early than RPC server.
The BlockMap instance is null for coming request from DN.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message