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https://issues.apache.org/jira/browse/HBASE-10108?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13842965#comment-13842965
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takeshi.miao commented on HBASE-10108:
--------------------------------------
bq.-1 findbugs. The patch appears to introduce 2 new Findbugs (version 1.3.9)
warnings
not for this patch
> NullPointerException thrown while use Canary with '-regionserver' option
> ------------------------------------------------------------------------
>
> Key: HBASE-10108
> URL: https://issues.apache.org/jira/browse/HBASE-10108
> Project: HBase
> Issue Type: Bug
> Components: monitoring
> Affects Versions: 0.99.0
> Reporter: takeshi.miao
> Priority: Minor
> Fix For: 0.99.0
>
> Attachments: HBASE-10108-trunk-01.patch
>
>
> The NullPointerException will be thrown while using following command
> {code}
> HADOOP_CLASSPATH="`bin/hbase classpath`" hadoop
> org.apache.hadoop.hbase.tool.Canary -regionserver
> {code}
> The error msg as follows
> {code}
> ...
> 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)
> {code}
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