[HBASE-13388] Handling NullPointer in ZKProcedureMemberRpcs while getting ZNode data

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 1.0.1, 1.1.0, 0.98.12, 2.0.0
• Hadoop Flags: Reviewed
• Assignee: Vikas Vishwakarma
• Reporter: Vikas Vishwakarma
• Created: 02/Apr/15 12:05
• Updated: 28/Apr/15 19:18
• Resolved: 02/Apr/15 21:25

Description

Handling a minor NullPointer in ZKProcedureMemberRpcs while getting ZNode data. Does not have any functional impact is just a little cleaner

2015-04-01 10:04:32,913 INFO [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Received procedure start children changed event: /hbase/online-snapshot/acquired
2015-04-01 10:04:32,913 DEBUG [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Looking for new procedures under znode:'/hbase/online-snapshot/acquired'
2015-04-01 10:04:32,916 DEBUG [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Found procedure znode: /hbase/online-snapshot/acquired/test13
2015-04-01 10:04:32,917 ERROR [ver60020-EventThread] zookeeper.ClientCnxn - Error while calling watcher
java.lang.NullPointerException
at org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.startNewSubprocedure(ZKProcedureMemberRpcs.java:203)
at org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.waitForNewProcedures(ZKProcedureMemberRpcs.java:172)
at org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs.access$100(ZKProcedureMemberRpcs.java:55)
at org.apache.hadoop.hbase.procedure.ZKProcedureMemberRpcs$1.nodeChildrenChanged(ZKProcedureMemberRpcs.java:107)
at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:351)
at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:522)
at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:498)
2015-04-01 10:04:32,917 INFO [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Received procedure start children changed event: /hbase/online-snapshot/acquired
2015-04-01 10:04:32,917 DEBUG [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Looking for new procedures under znode:'/hbase/online-snapshot/acquired'
2015-04-01 10:04:32,918 INFO [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Received procedure abort children changed event: /hbase/online-snapshot/abort
2015-04-01 10:04:32,918 DEBUG [ver60020-EventThread] procedure.ZKProcedureMemberRpcs - Checking for aborted procedures on node: '/hbase/online-snapshot/abort'