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Hudson commented on HBASE-8790: ------------------------------- Integrated in hbase-0.95-on-hadoop2 #151 (See [https://builds.apache.org/job/hbase-0.95-on-hadoop2/151/]) HBASE-8790 NullPointerException thrown when stopping regionserver (Liang Xie) (Revision 1497172) Result = FAILURE tedyu : Files : * /hbase/branches/0.95/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegionServer.java > NullPointerException thrown when stopping regionserver > ------------------------------------------------------ > > Key: HBASE-8790 > URL: https://issues.apache.org/jira/browse/HBASE-8790 > Project: HBase > Issue Type: Bug > Components: regionserver > Affects Versions: 0.95.1 > Environment: CentOS 5.9 x86_64, java version "1.6.0_45", CDH4.3 > Reporter: Xiong LIU > Assignee: Liang Xie > Fix For: 0.98.0, 0.95.2 > > Attachments: HBase-8790.txt > > > The Hbase cluster is a fresh start with one regionserver. > When we stop hbase, an unhandled NullPointerException is throwed in the > regionserver. > The regionserver's log is as follows: > 2013-06-21 10:21:11,284 INFO [regionserver61020] regionserver.HRegionServer: > Closing user regions > 2013-06-21 10:21:14,288 DEBUG [regionserver61020] regionserver.HRegionServer: > Waiting on 1028785192 > 2013-06-21 10:21:14,290 FATAL [regionserver61020] regionserver.HRegionServer: > ABORTING region server HOSTNAME_TEST,61020,1371781086817 > : Unhandled: null > java.lang.NullPointerException > at > org.apache.hadoop.hbase.regionserver.HRegionServer.tryRegionServerReport(HRegionServer.java:988) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:832) > at java.lang.Thread.run(Thread.java:662) > 2013-06-21 10:21:14,292 FATAL [regionserver61020] regionserver.HRegionServer: > RegionServer abort: loaded coprocessors are: [org.apache > .hadoop.hbase.coprocessor.MultiRowMutationEndpoint] > 2013-06-21 10:21:14,293 INFO [regionserver61020] regionserver.HRegionServer: > STOPPED: Unhandled: null > 2013-06-21 10:21:14,293 INFO [regionserver61020] ipc.RpcServer: Stopping > server on 61020 > It seems that after closing user regions, the rssStub is null. > update: > we found that if setting hbase.client.ipc.pool.type to RoundRobinPool(or > other pool type) and hbase.client.ipc.pool.size to 10(possibly other values) > in hbase-site.xml, the regionserver is continuously attempting connect to > master. and if we stop hbase, the above NullPointerException occurred. With > hbase.client.ipc.pool.size set to 1, the cluster can be completely stopped. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira