What is the meaning of this exception ?`

[Phantom]

I see a whole lot of this in my namenode log. Is this benign or is there
something something more sinister going on ? Why would this be happening ?

2007-06-21 00:16:24,782 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 1 on 9000, call rollEditLog() from 10.16.159.101:48099: error:
java.io.IOException: Attempt to roll edit log but edits.new exists
java.io.IOException: Attempt to roll edit log but edits.new exists
       at org.apache.hadoop.dfs.FSEditLog.rollEditLog(FSEditLog.java:467)
       at org.apache.hadoop.dfs.FSNamesystem.rollEditLog(FSNamesystem.java
:3239)
       at org.apache.hadoop.dfs.NameNode.rollEditLog(NameNode.java:544)
       at sun.reflect.GeneratedMethodAccessor13.invoke(Unknown Source)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
       at java.lang.reflect.Method.invoke(Unknown Source)
       at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:341)
       at org.apache.hadoop.ipc.Server$Handler.run(Server.java:573)
2007-06-21 00:21:24,818 INFO org.apache.hadoop.fs.FSNamesystem: Roll Edit
Log

Thanks
Avinash