NullPointerException when decoding remote exception
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Key: HBASE-3378
URL: https://issues.apache.org/jira/browse/HBASE-3378
Project: HBase
Issue Type: Bug
Components: util
Affects Versions: 0.20.6
Reporter: Ted Yu
Fix For: 0.90.1
We recently saw several occurrences of NPE. Here is one of them:
{noformat}
2010-12-20 08:57:14,214 WARN org.apache.hadoop.mapred.TaskTracker: Error
running child
java.io.IOException: java.io.IOException: java.lang.NullPointerException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at
org.apache.hadoop.hbase.RemoteExceptionHandler.decodeRemoteException(RemoteExceptionHandler.java:94)
at
org.apache.hadoop.hbase.client.HBaseAdmin.modifyTable(HBaseAdmin.java:887)
at
org.apache.hadoop.hbase.client.HBaseAdmin.modifyTable(HBaseAdmin.java:791)
at org.apache.hadoop.hbase.client.HBaseAdmin.flush(HBaseAdmin.java:703)
{noformat}
In master server log, I only found:
{noformat}
2010-12-20 16:57:19,357 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server
handler 15 on 60000, call modifyTable([...@5b591d0b, TABLE_FLUSH, null) from
10.202.114.157:2760: error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
2010-12-20 16:57:19,357 WARN org.apache.hadoop.ipc.HBaseServer: IPC Server
Responder, call modifyTable([...@5b591d0b, TABLE_FLUSH, null) from
10.202.114.157:2760: output error
2010-12-20 16:57:19,357 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server
handler 17 on 60000, call modifyTable([...@3781ec07, TABLE_FLUSH, null) from
10.202.114.136:35448: error: java.io.IOException: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
2010-12-20 16:57:19,358 INFO org.apache.hadoop.ipc.HBaseServer: IPC Server
handler 15 on 60000 caught: java.nio.channels.ClosedChannelException
at
sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:126)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:324)
at
org.apache.hadoop.hbase.ipc.HBaseServer.channelWrite(HBaseServer.java:1210)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Responder.processResponse(HBaseServer.java:698)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Responder.doRespond(HBaseServer.java:762)
at
org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1026)
{noformat}
RemoteExceptionHandler should be able to handle NPE.
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