[HDFS-3347] NullPointerException When trying to log to editstreams

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Component/s: namenode

Environment

HDFS

• Assignee: amith
• Reporter: amith
• Created: 02/May/12 12:44
• Updated: 25/Sep/12 09:26
• Resolved: 25/Sep/12 09:26

Description

When i try to create a file i got a exception

2012-05-02 17:42:55,768 DEBUG hdfs.StateChange (NameNodeRpcServer.java:create(402)) - *DIR* NameNode.create: file /a._COPYING_ for DFSClient_NONMAPREDUCE_1515782500_1 at 10.18.40.95
2012-05-02 17:42:55,770 DEBUG hdfs.StateChange (FSNamesystem.java:startFileInternal(1547)) - DIR* NameSystem.startFile: src=/a._COPYING_, holder=DFSClient_NONMAPREDUCE_1515782500_1, clientMachine=10.18.40.95, createParent=true, replication=1, createFlag=[CREATE, OVERWRITE]
2012-05-02 17:42:55,778 WARN  ipc.Server (Server.java:run(1701)) - IPC Server handler 1 on 8020, call org.apache.hadoop.hdfs.protocol.ClientProtocol.create from 10.18.40.95:37973: error: java.lang.NullPointerException
java.lang.NullPointerException
	at org.apache.hadoop.hdfs.server.namenode.FSEditLog.logEdit(FSEditLog.java:348)
	at org.apache.hadoop.hdfs.server.namenode.FSEditLog.logGenerationStamp(FSEditLog.java:755)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.nextGenerationStamp(FSNamesystem.java:4357)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1621)
	at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1509)
	at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.create(NameNodeRpcServer.java:409)
	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.create(ClientNamenodeProtocolServerSideTranslatorPB.java:200)
	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:42590)
	at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:428)
	at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:905)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1688)
	at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1684)
	at java.security.AccessController.doPrivileged(Native Method)
	at javax.security.auth.Subject.doAs(Subject.java:396)
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1205)
	at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1682)

analysing the same, will provide the details soon.

Issue Links

• duplicates: HDFS-3026 HA: Handle failure during HA state transition