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Posted to mapreduce-issues@hadoop.apache.org by "Robert Joseph Evans (JIRA)" <ji...@apache.org> on 2012/05/08 20:19:49 UTC
[jira] [Updated] (MAPREDUCE-4233) NPE can happen in RMNMNodeInfo.
[ https://issues.apache.org/jira/browse/MAPREDUCE-4233?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Joseph Evans updated MAPREDUCE-4233:
-------------------------------------------
Status: Patch Available (was: Open)
> NPE can happen in RMNMNodeInfo.
> -------------------------------
>
> Key: MAPREDUCE-4233
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4233
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.23.3
> Reporter: Robert Joseph Evans
> Assignee: Robert Joseph Evans
> Priority: Critical
> Attachments: MR-4233.txt
>
>
> {noformat}
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.yarn.server.resourcemanager.RMNMInfo.getLiveNodeManagers(RMNMInfo.java:96)
> at sun.reflect.GeneratedMethodAccessor50.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:93)
> at com.sun.jmx.mbeanserver.StandardMBeanIntrospector.invokeM2(StandardMBeanIntrospector.java:27)
> at com.sun.jmx.mbeanserver.MBeanIntrospector.invokeM(MBeanIntrospector.java:208)
> at com.sun.jmx.mbeanserver.PerInterface.getAttribute(PerInterface.java:65)
> at com.sun.jmx.mbeanserver.MBeanSupport.getAttribute(MBeanSupport.java:216)
> at javax.management.StandardMBean.getAttribute(StandardMBean.java:358)
> at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:666)
> {noformat}
> Looks like rmcontext.getRMNodes() is not kept in sync with scheduler.getNodeReport(), so that the report can be null even though the context still knowns about the node.
> The simple fix is to add in a null check.
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