NPE in TaskMonitor
------------------
Key: HBASE-4386
URL: https://issues.apache.org/jira/browse/HBASE-4386
Project: HBase
Issue Type: Bug
Affects Versions: 0.92.0
Reporter: Todd Lipcon
Priority: Critical
Fix For: 0.92.0
Saw the following hitting /rs-status
<pre> INTERNAL_SERVER_ERROR</pre></p><h3>Caused
by:</h3><pre>java.lang.NullPointerException
at
org.apache.hadoop.hbase.monitoring.TaskMonitor.purgeExpiredTasks(TaskMonitor.java:97)
at
org.apache.hadoop.hbase.monitoring.TaskMonitor.getTasks(TaskMonitor.java:127)
at
org.apache.hbase.tmpl.common.TaskMonitorTmplImpl.renderNoFlush(TaskMonitorTmplImpl.java:50)
at
org.apache.hbase.tmpl.common.TaskMonitorTmpl.renderNoFlush(TaskMonitorTmpl.java:170)
at
org.apache.hbase.tmpl.regionserver.RSStatusTmplImpl.renderNoFlush(RSStatusTmplImpl.java:70)
at
org.apache.hbase.tmpl.regionserver.RSStatusTmpl.renderNoFlush(RSStatusTmpl.java:176)
at
org.apache.hbase.tmpl.regionserver.RSStatusTmpl.render(RSStatusTmpl.java:167)
at
org.apache.hadoop.hbase.regionserver.RSStatusServlet.doGet(RSStatusServlet.java:48)
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