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From "晋光峰" <jinguangf...@gmail.com>
Subject Fwd: Region offline error while running hbase on hadoop
Date Tue, 10 Jun 2008 06:21:00 GMT
Dears,

I setup hbase(0.1.2) app on hadoop(0.16.4) distributed framework to do some
test. When i write data to hbase tables, after some running time, the hbase
throws below errors:

java.lang.RuntimeException: java.lang.IllegalStateException: region
offline: similarity,,1213117931025
	at org.apache.hadoop.hbase.HTable.getRegionServerWithRetries(HTable.java:1050)
	at org.apache.hadoop.hbase.HTable.deleteAll(HTable.java:640)

	at org.apache.hadoop.hbase.HTable.deleteAll(HTable.java:625)
	at com.izenesoft.clustering.ap.hbase.Matrix.setRowValues(Matrix.java:172)
	at com.izenesoft.clustering.ap.similarity.SimilarityReducer.reduce(SimilarityReducer.java:61)

	at com.izenesoft.clustering.ap.similarity.SimilarityReducer.reduce(SimilarityReducer.java:1)
	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:333)
	at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:2084)

Caused by: java.lang.IllegalStateException: region offline:
similarity,,1213117931025
	at org.apache.hadoop.hbase.HConnectionManager$TableServers.locateRegionInMeta(HConnectionManager.java:438)
	at org.apache.hadoop.hbase.HConnectionManager$TableServers.locateRegion(HConnectionManager.java:350)

	at org.apache.hadoop.hbase.HConnectionManager$TableServers.relocateRegion(HConnectionManager.java:318)
	at org.apache.hadoop.hbase.HTable.getRegionLocation(HTable.java:114)
	at org.apache.hadoop.hbase.HTable$ServerCallable.instantiateServer(HTable.java:1009)

	at org.apache.hadoop.hbase.HTable.getRegionServerWithRetries(HTable.java:1024)
	... 7 more

At the beginning table data insertion, no error happened. It seems that
after some time, the hbase table can' be available. I use 3 region servers
with one master server, and the table rows/columns counts are about 15,000.
I think maybe this is a bug for hbase. Is there anyone faced this problems
and can give me some suggestions?


Regards
-- 
Guangfeng Jin

Software Engineer

iZENEsoft (Shanghai) Co., Ltd

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