The situation is quite simple: I'm just trying to launch an HBase instance from
a hbase directory in HDFS which was remaining inactive for a some period of
time (in fact the HBase was just running from a different directory on the same
HDFS, it was something like a backup). But for some reasons there has been some
problems in launching it, which resulted in some exceptions, mostly like this:
2008-09-18 12:35:53,995 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2
on 60020 caught: java.nio.channels.ClosedChannelException
at
sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:125)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:294)
at
org.apache.hadoop.ipc.Server$Responder.processResponse(Server.java:594)
at org.apache.hadoop.ipc.Server$Responder.doRespond(Server.java:654)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:917)
and this:
2008-09-18 12:53:35,097 WARN
org.apache.hadoop.hbase.regionserver.HRegionServer: Processing message (Retry:
1)
java.net.SocketTimeoutException: timed out waiting for rpc response
at org.apache.hadoop.ipc.Client.call(Client.java:559)
at
org.apache.hadoop.hbase.ipc.HbaseRPC$Invoker.invoke(HbaseRPC.java:230)
at $Proxy0.regionServerReport(Unknown Source)
at
org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:314)
at java.lang.Thread.run(Thread.java:595)
The snapshot was made while cleanly stopping of HBase and copying (or maybe
moving, I'm not really sure) it's folder to another location in DFS.
Even web interface of HBase have failed to launch, but it seems that that HBase
is doing something when it tries to launch: assigning some regions,
creating/removing some blocks in HDFS, etc. But finally it fails...
Does anyone have any ideas about the reasons of such a behavior?
P.S.: Hadoop 0.17.1, HBase 0.2.0, Debian Etch
Thanks,
Ivan Blinkov
