[HBASE-10867] TestRegionPlacement#testRegionPlacement occasionally fails

• Type: Test
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.99.0
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Ted Yu
• Created: 28/Mar/14 21:37
• Updated: 21/Feb/15 23:30
• Resolved: 01/Apr/14 02:15

Description

From https://builds.apache.org/job/HBase-TRUNK/5047/testReport/org.apache.hadoop.hbase.master/TestRegionPlacement/testRegionPlacement/ :

java.lang.ArrayIndexOutOfBoundsException: 10
	at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:368)
	at java.util.concurrent.CopyOnWriteArrayList.get(CopyOnWriteArrayList.java:377)
	at org.apache.hadoop.hbase.LocalHBaseCluster.getRegionServer(LocalHBaseCluster.java:224)
	at org.apache.hadoop.hbase.MiniHBaseCluster.getRegionServer(MiniHBaseCluster.java:609)
	at org.apache.hadoop.hbase.master.TestRegionPlacement.killRandomServerAndVerifyAssignment(TestRegionPlacement.java:303)
	at org.apache.hadoop.hbase.master.TestRegionPlacement.testRegionPlacement(TestRegionPlacement.java:270)

In the setup:

    TEST_UTIL.startMiniCluster(SLAVES);

where SLAVES is 10.
So when 10 was used in TEST_UTIL.getHBaseCluster().getRegionServer(killIndex), we would get ArrayIndexOutOfBoundsException.