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From "Michele Catasta" <michele.cata...@deri.org>
Subject Hbase scripts problem
Date Mon, 27 Aug 2007 14:44:47 GMT

we are having problems with hbase scripts. Basically, when we run the
stop script, it's not able to kill gracefully the HMaster (instead, it
forks another HMaster that after a few time dies).

The start script, on the other hand, is not able to start up the
HRegionserver, probably because the HMaster has been killed improperly
before. Taking a look at the logs, I found that he was complaining
because of an already existing directory inside HDFS (regionserver log
directory IIRC). After I deleted it, it is dying for another reason
that I cannot understand:

2007-08-27 14:40:12,979 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 8 on 60010: starting
2007-08-27 14:40:12,979 INFO org.apache.hadoop.hbase.HRegionServer:
HRegionServer started at:
2007-08-27 14:40:12,980 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 9 on 60010: starting
2007-08-27 14:40:12,984 INFO org.apache.hadoop.hbase.Leases: closing leases
2007-08-27 14:40:12,984 INFO org.apache.hadoop.hbase.Leases: leases closed
2007-08-27 14:40:12,984 INFO org.apache.hadoop.ipc.Server: Stopping
server on 60010
2007-08-27 14:40:12,985 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 0 on 60010: exiting

This is a snippet of the log file. Handlers are initialized and soon
after stopped. Maybe because I've used start-hbase.sh even if an
HMaster instance was already up?

We would like to solve this situation in a graceful way, because the
last time we needed to erase all our hbase content.

Best Regards,
    -Michele Catasta

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