[HBASE-12966] NPE in HMaster while recovering tables in Enabling state

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0, 1.1.0
• Component/s: master
• Hadoop Flags: Reviewed
• Assignee: Andrey Stepachev
• Reporter: ramkrishna.s.vasudevan
• Created: 04/Feb/15 08:21
• Updated: 06/Apr/18 17:55
• Resolved: 05/Feb/15 22:42

Description

java.lang.NullPointerException
        at org.apache.hadoop.hbase.master.handler.EnableTableHandler.handleEnableTable(EnableTableHandler.java:210)
        at org.apache.hadoop.hbase.master.handler.EnableTableHandler.process(EnableTableHandler.java:142)
        at org.apache.hadoop.hbase.master.AssignmentManager.recoverTableInEnablingState(AssignmentManager.java:1695)
        at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:416)
        at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:720)
        at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:170)
        at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1459)
        at java.lang.Thread.run(Thread.java:745)
2015-02-04 16:11:45,932 FATAL [stobdtserver3:16040.activeMasterManager] master.HMaster: Master server abort: loaded coprocessors are: [org.apache.hadoop.hbor.MultiRowMutationEndpoint]
2015-02-04 16:11:45,933 FATAL [stobdtserver3:16040.activeMasterManager] master.HMaster: Unhandled exception. Starting shutdown.
java.lang.NullPointerException
        at org.apache.hadoop.hbase.master.handler.EnableTableHandler.handleEnableTable(EnableTableHandler.java:210)
        at org.apache.hadoop.hbase.master.handler.EnableTableHandler.process(EnableTableHandler.java:142)
        at org.apache.hadoop.hbase.master.AssignmentManager.recoverTableInEnablingState(AssignmentManager.java:1695)
        at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:416)
        at org.apache.hadoop.hbase.master.HMaster.finishActiveMasterInitialization(HMaster.java:720)
        at org.apache.hadoop.hbase.master.HMaster.access$500(HMaster.java:170)
        at org.apache.hadoop.hbase.master.HMaster$1.run(HMaster.java:1459)
        at java.lang.Thread.run(Thread.java:745)

A table was trying to recover from ENABLING state and the master got the above exception. Note that the set up was 2 master with 1 RS (total 3 machines).