[HBASE-13663] HMaster fails to restart 'HMaster: Failed to become active master'

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0
• Fix Version/s: 1.2.0, 1.1.1, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Ted Yu
• Reporter: Romil Choksi
• Created: 11/May/15 18:54
• Updated: 24/Jun/22 18:49
• Resolved: 12/May/15 18:38

Description

HMaster fails to restart 'HMaster: Failed to become active master'

from Master log:

2015-05-08 11:25:14,020 FATAL [MasterNOde:16000.activeMasterManager] master.HMaster: Failed to become active master
java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.AssignmentManager.rebuildUserRegions(AssignmentManager.java:2885)
	at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:483)
	at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:763)
	at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:182)
	at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1632)
	at java.lang.Thread.run(Thread.java:745)
2015-05-08 11:25:14,023 FATAL [MasterNOde:16000.activeMasterManager] master.HMaster: Master server abort: loaded coprocessors are: []
2015-05-08 11:25:14,023 FATAL [MasterNOde:16000.activeMasterManager] master.HMaster: Unhandled exception. Starting shutdown.
java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.AssignmentManager.rebuildUserRegions(AssignmentManager.java:2885)
	at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:483)
	at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:763)
	at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:182)
	at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1632)
	at java.lang.Thread.run(Thread.java:745)