[ 
https://issues.apache.org/jira/browse/HBASE-9498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764605#comment-13764605
 ] 

Hudson commented on HBASE-9498:
-------------------------------

SUCCESS: Integrated in HBase-TRUNK #4492 (See 
[https://builds.apache.org/job/HBase-TRUNK/4492/])
HBASE-9498 NPE in HBaseAdmin if master not running (stack: rev 1521902)
* 
/hbase/trunk/hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java

                
> NPE in HBaseAdmin if master not running
> ---------------------------------------
>
>                 Key: HBASE-9498
>                 URL: https://issues.apache.org/jira/browse/HBASE-9498
>             Project: HBase
>          Issue Type: Bug
>          Components: Admin
>            Reporter: stack
>            Assignee: stack
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: 9498.txt
>
>
> It is caused because master is not up.  The prepare fails:
> {code}
> 2:47:46.573 PM        ERROR   com.cloudera.cmon.firehose.AbstractHBasePoller  
> Error polling HBASE-1, error: java.io.IOException: Can't get master address 
> from ZooKeeper; znode data == null
> org.apache.hadoop.hbase.MasterNotRunningException: java.io.IOException: Can't 
> get master address from ZooKeeper; znode data == null
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$StubMaker.makeStub(HConnectionManager.java:1641)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$MasterMonitorServiceStubMaker.makeStub(HConnectionManager.java:1667)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getKeepAliveMasterMonitorService(HConnectionManager.java:2152)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.listTables(HConnectionManager.java:2629)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.listTables(HBaseAdmin.java:290)
>       at 
> com.cloudera.cmf.cdh5client.hbase.HBaseAdminImpl.listTables(HBaseAdminImpl.java:60)
>       at 
> com.cloudera.cmon.firehose.HBaseRegionHealthCanaryPoller$CanaryPollerRunnable.run(HBaseRegionHealthCanaryPoller.java:213)
>       at 
> com.cloudera.cmon.firehose.HBaseRegionHealthCanaryPoller$CanaryPollerRunnable.run(HBaseRegionHealthCanaryPoller.java:177)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1477)
>       at 
> com.cloudera.cmf.cdh5client.security.UserGroupInformationImpl.doAs(UserGroupInformationImpl.java:29)
>       at 
> com.cloudera.cmon.firehose.HBaseRegionHealthCanaryPoller.performPoll(HBaseRegionHealthCanaryPoller.java:116)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.handleHbaseService(AbstractHBasePoller.java:339)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.runWithTracking(AbstractHBasePoller.java:215)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.run(AbstractHBasePoller.java:140)
>       at 
> com.cloudera.enterprise.PeriodicEnterpriseService$UnexceptionablePeriodicRunnable.doWork(PeriodicEnterpriseService.java:116)
>       at 
> com.cloudera.enterprise.PeriodicEnterpriseService$UnexceptionablePeriodicRunnable.run(PeriodicEnterpriseService.java:65)
>       at 
> com.cloudera.enterprise.AbstractCDHVersionAwarePeriodicService$4.run(AbstractCDHVersionAwarePeriodicService.java:116)
>       at 
> com.cloudera.cmf.cdh5client.CDH5TaskRunner.run(CDH5TaskRunner.java:45)
>       at java.lang.Thread.run(Thread.java:724)
> Caused by: java.io.IOException: Can't get master address from ZooKeeper; 
> znode data == null
>       at 
> org.apache.hadoop.hbase.zookeeper.MasterAddressTracker.getMasterAddress(MasterAddressTracker.java:108)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$StubMaker.makeStubNoRetries(HConnectionManager.java:1567)
>       at 
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$StubMaker.makeStub(HConnectionManager.java:1612)
>       ... 20 more
> {code}
> Then when done we do the call:
> {code}
> 2:47:51.587 PM        ERROR   com.cloudera.cmon.firehose.HBasePoller  
> Encountered exception null
> java.lang.NullPointerException
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin$MasterMonitorCallable.close(HBaseAdmin.java:3053)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:3089)
>       at 
> org.apache.hadoop.hbase.client.HBaseAdmin.getClusterStatus(HBaseAdmin.java:2081)
>       at 
> com.cloudera.cmf.cdh5client.hbase.HConnectionImpl.getClusterStatus(HConnectionImpl.java:69)
>       at 
> com.cloudera.cmon.firehose.HbaseServicePolledStatus.update(HbaseServicePolledStatus.java:137)
>       at com.cloudera.cmon.firehose.HBasePoller$1.run(HBasePoller.java:95)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1477)
>       at 
> com.cloudera.cmf.cdh5client.security.UserGroupInformationImpl.doAs(UserGroupInformationImpl.java:29)
>       at 
> com.cloudera.cmon.firehose.HBasePoller.performPoll(HBasePoller.java:84)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.handleHbaseService(AbstractHBasePoller.java:339)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.runWithTracking(AbstractHBasePoller.java:215)
>       at 
> com.cloudera.cmon.firehose.AbstractHBasePoller.run(AbstractHBasePoller.java:140)
>       at 
> com.cloudera.enterprise.PeriodicEnterpriseService$UnexceptionablePeriodicRunnable.doWork(PeriodicEnterpriseService.java:116)
>       at 
> com.cloudera.enterprise.PeriodicEnterpriseService$UnexceptionablePeriodicRunnable.run(PeriodicEnterpriseService.java:65)
>       at 
> com.cloudera.enterprise.AbstractCDHVersionAwarePeriodicService$4.run(AbstractCDHVersionAwarePeriodicService.java:116)
>       at 
> com.cloudera.cmf.cdh5client.CDH5TaskRunner.run(CDH5TaskRunner.java:45)
>       at java.lang.Thread.run(Thread.java:724)
> {code}
> Let me fix.  Let me make sure there aren't other prepare/close's that have 
> this issue while at it.

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