[HBASE-9349] [0.92] NPE in HMaster during shutdown

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.92.3
• Fix Version/s: 0.92.3
• Assignee: Andrew Kyle Purtell
• Reporter: Andrew Kyle Purtell
• Created: 27/Aug/13 05:24
• Updated: 16/Jun/22 17:58
• Resolved: 27/Aug/13 05:25

Description

Found this in a run of TestWALObserver:

java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.HMaster.shutdown(HMaster.java:1510)
	at org.apache.hadoop.hbase.util.JVMClusterUtil.shutdown(JVMClusterUtil.java:226)
	at org.apache.hadoop.hbase.LocalHBaseCluster.shutdown(LocalHBaseCluster.java:424)
	at org.apache.hadoop.hbase.MiniHBaseCluster.shutdown(MiniHBaseCluster.java:417)
	at org.apache.hadoop.hbase.HBaseTestingUtility.shutdownMiniHBaseCluster(HBaseTestingUtility.java:607)
	at org.apache.hadoop.hbase.HBaseTestingUtility.shutdownMiniCluster(HBaseTestingUtility.java:583)
	at org.apache.hadoop.hbase.coprocessor.TestWALObserver.teardownAfterClass(TestWALObserver.java:111)

if the active master in the minicluster is terminated before fully initialized. Needs null checks in HMaster#shutdown.