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From Yabo Xu <arber.resea...@gmail.com>
Subject Region server forced to shut down
Date Tue, 13 Jul 2010 12:43:34 GMT
Hi all:

We applied hadoop/hbase for NLP analysis and intermediate data storage, and
encountered a string of problems when the data scale is up.

Attached is a region server log that shows how it crashed after running a
mapreduce task with intensive read/writes.

The FATAL error seems to occur at the following line:

"2010-07-13 18:02:56,723 FATAL
org.apache.hadoop.hbase.regionserver.MemcacheFlusher: Replay of hlog
required. Forcing server shutdown"

But before this, there are many warning or errors on reading/creating new
blocks.

We have been struggling on this for a while, but could not identify how to
fix the problem. Wonder if anybody can help us take a look at the log and
check out the problem?

Thanks in advance.



Best,
Arber

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