[HBASE-10108] NullPointerException thrown while use Canary with '-regionserver' option

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.98.0, 0.96.1, 0.99.0
• Fix Version/s: 0.98.0, 0.96.1, 0.99.0
• Component/s: monitoring
• Hadoop Flags: Reviewed
• Assignee: takeshi.miao
• Reporter: takeshi.miao
• Created: 09/Dec/13 06:15
• Updated: 16/Dec/13 18:46
• Resolved: 09/Dec/13 21:16

Description

The NullPointerException will be thrown while using following command

HADOOP_CLASSPATH="`bin/hbase classpath`" hadoop org.apache.hadoop.hbase.tool.Canary -regionserver

The error msg as follows

...
13/12/09 05:17:02 INFO zookeeper.ClientCnxn: Session establishment complete on server scottm-hbase-1.lab/10.1.145.175:2181, sessionid = 0x142d5c52b030015, negotiated timeout = 90000
Exception in thread "Thread-1" java.lang.NullPointerException
        at org.apache.hadoop.hbase.tool.Canary$RegionServerMonitor.checkNoTableNames(Canary.java:564)
        at org.apache.hadoop.hbase.tool.Canary$RegionServerMonitor.run(Canary.java:545)
        at java.lang.Thread.run(Thread.java:662)

Issue Links

• relates to: HBASE-10154 Add a unit test for Canary tool