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Hudson commented on HBASE-11037: -------------------------------- FAILURE: Integrated in hbase-0.96 #391 (See [https://builds.apache.org/job/hbase-0.96/391/]) HBASE-11037 Race condition in TestZKBasedOpenCloseRegion. (larsh: rev 1588612) * /hbase/branches/0.96/hbase-server/src/test/java/org/apache/hadoop/hbase/master/TestZKBasedOpenCloseRegion.java > Race condition in TestZKBasedOpenCloseRegion > -------------------------------------------- > > Key: HBASE-11037 > URL: https://issues.apache.org/jira/browse/HBASE-11037 > Project: HBase > Issue Type: Bug > Reporter: Lars Hofhansl > Assignee: Lars Hofhansl > Fix For: 0.99.0, 0.94.19, 0.98.2, 0.96.3 > > Attachments: 11037-0.94.txt, 11037-0.98.txt, 11037-trunk.txt > > > testCloseRegion is called before testReOpenRegion. > Here's the sequence of events: > {code} > 2014-04-18 20:58:05,645 INFO [Thread-380] > master.TestZKBasedOpenCloseRegion(313): Running testCloseRegion > 2014-04-18 20:58:05,645 INFO [Thread-380] > master.TestZKBasedOpenCloseRegion(315): Number of region servers = 2 > 2014-04-18 20:58:05,645 INFO [Thread-380] > master.TestZKBasedOpenCloseRegion(164): -ROOT-,,0.70236052 > 2014-04-18 20:58:05,646 DEBUG [Thread-380] > master.TestZKBasedOpenCloseRegion(320): Asking RS to close region > -ROOT-,,0.70236052 > ... > 2014-04-18 20:58:06,237 INFO > [RS_CLOSE_ROOT-hemera.apache.org,46533,1397854669633-0] > regionserver.HRegion(1148): Closed -ROOT-,,0.70236052 > ... > 2014-04-18 20:58:06,404 INFO [Thread-380] > master.TestZKBasedOpenCloseRegion(333): Done with testCloseRegion > {code} > Then > {code} > 2014-04-18 20:58:06,431 INFO [pool-1-thread-1] hbase.ResourceChecker(157): > before master.TestZKBasedOpenCloseRegion#testReOpenRegion: 234 threads, 388 > file descriptors 4 connections, > ... > 2014-04-18 20:58:06,466 DEBUG > [MASTER_OPEN_REGION-hemera.apache.org,52650,1397854669138-3] > zookeeper.ZKUtil(1597): master:52650-0x14576a1835d0000 Retrieved 62 byte(s) > of data from znode /hbase/unassigned/70236052; data=region=-ROOT-,,0, > origin=hemera.apache.org,46533,1397854669633, state=RS_ZK_REGION_OPENED > 2014-04-18 20:58:06,473 DEBUG [pool-1-thread-1] client.ClientScanner(191): > Finished with scanning at {NAME => '.META.,,1', STARTKEY => '', ENDKEY => '', > ENCODED => 1028785192,} > 2014-04-18 20:58:06,473 INFO [Thread-396] > master.TestZKBasedOpenCloseRegion(123): Number of region servers = 2 > 2014-04-18 20:58:06,474 INFO [Thread-396] > master.TestZKBasedOpenCloseRegion(164): -ROOT-,,0.70236052 > 2014-04-18 20:58:06,474 DEBUG [Thread-396] > master.TestZKBasedOpenCloseRegion(130): Asking RS to close region > -ROOT-,,0.70236052 > 2014-04-18 20:58:06,474 INFO [Thread-396] > master.TestZKBasedOpenCloseRegion(147): Unassign -ROOT-,,0.70236052 > 2014-04-18 20:58:06,474 DEBUG [Thread-396] master.AssignmentManager(2126): > Starting unassignment of region -ROOT-,,0.70236052 (offlining) > 2014-04-18 20:58:06,475 DEBUG [Thread-396] master.AssignmentManager(2132): > Attempted to unassign region -ROOT-,,0.70236052 but it is not currently > assigned anywhere > 2014-04-18 20:58:06,478 DEBUG [pool-1-thread-1-EventThread] > zookeeper.ZooKeeperWatcher(294): master:52650-0x14576a1835d0000 Received > ZooKeeper Event, type=NodeDeleted, state=SyncConnected, > path=/hbase/unassigned/70236052 > 2014-04-18 20:58:06,478 DEBUG [pool-1-thread-1-EventThread] > master.AssignmentManager(1176): The znode of region -ROOT-,,0.70236052 has > been deleted. > 2014-04-18 20:58:06,478 INFO [pool-1-thread-1-EventThread] > master.AssignmentManager(1188): The master has opened the region > -ROOT-,,0.70236052 that was online on hemera.apache.org,46533,1397854669633 > 2014-04-18 20:58:06,478 DEBUG [pool-1-thread-1-EventThread] > zookeeper.ZooKeeperWatcher(294): master:52650-0x14576a1835d0000 Received > ZooKeeper Event, type=NodeChildrenChanged, state=SyncConnected, > path=/hbase/unassigned > {code} > Then nothing happens. So testCloseRegion unassigns the ROOT region and > testReOpenRegion starts before ROOT is reassigned. Hence it waits forever for > the close event, since it never happens. > This is the key "master.AssignmentManager(2132): Attempted to unassign region > -ROOT-,,0.70236052 but it is not currently assigned anywhere" > The easiest fix is to just run testCloseRegion last (as it was before we > switched junit). -- This message was sent by Atlassian JIRA (v6.2#6252)