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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-8975) NPE/HTTP 500 when opening the master's web UI too early
Date Wed, 17 Jul 2013 23:48:49 GMT
Jean-Daniel Cryans created HBASE-8975:
-----------------------------------------

             Summary: NPE/HTTP 500 when opening the master's web UI too early
                 Key: HBASE-8975
                 URL: https://issues.apache.org/jira/browse/HBASE-8975
             Project: HBase
          Issue Type: Bug
            Reporter: Jean-Daniel Cryans
            Assignee: Jean-Daniel Cryans
             Fix For: 0.98.0, 0.95.2


I'm getting an ugly NPE when trying to open the master's web UI too fast after starting it:

{noformat}
java.lang.NullPointerException
	at org.apache.hadoop.hbase.master.HMaster.getCoprocessors(HMaster.java:2053)
	at org.apache.hadoop.hbase.master.HMaster.getClusterStatus(HMaster.java:2003)
	at org.apache.hadoop.hbase.tmpl.master.BackupMasterStatusTmplImpl.renderNoFlush(BackupMasterStatusTmplImpl.java:39)
	at org.apache.hadoop.hbase.tmpl.master.BackupMasterStatusTmpl.renderNoFlush(BackupMasterStatusTmpl.java:111)
	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmplImpl.renderNoFlush(MasterStatusTmplImpl.java:237)
	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.renderNoFlush(MasterStatusTmpl.java:376)
	at org.apache.hadoop.hbase.tmpl.master.MasterStatusTmpl.render(MasterStatusTmpl.java:366)
	at org.apache.hadoop.hbase.master.MasterStatusServlet.doGet(MasterStatusServlet.java:92)
...
{noformat}

At that point the ServerManager == null.

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