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From "Ranith Sardar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-13869) RBF: Handle NPE for NamenodeBeanMetrics#getFederationMetrics()
Date Mon, 03 Sep 2018 02:02:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-13869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601732#comment-16601732
] 

Ranith Sardar commented on HDFS-13869:
--------------------------------------

Thankx [~surendrasingh] for reporting this issue.

[~elgoiri], I have attached a new patch, where null pointer for getFederationMetrics() has
been handled.

 

This scenario only comes when jmx service is running, metrics

As discussed with [~surendrasingh] (offline), he told me like he got this exception in test
failure. Mostly this occurs when system is not started fully and jmx call happened.

> RBF: Handle NPE for NamenodeBeanMetrics#getFederationMetrics()
> --------------------------------------------------------------
>
>                 Key: HDFS-13869
>                 URL: https://issues.apache.org/jira/browse/HDFS-13869
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>    Affects Versions: 3.0.0
>            Reporter: Surendra Singh Lilhore
>            Assignee: Ranith Sardar
>            Priority: Major
>         Attachments: HDFS-13869-002.diff, HDFS-13869.patch
>
>
> {code:java}
> Caused by: java.lang.NullPointerException
> 	at org.apache.hadoop.hdfs.server.federation.metrics.NamenodeBeanMetrics.getUsed(NamenodeBeanMetrics.java:205)
> 	at org.apache.hadoop.hdfs.server.federation.metrics.NamenodeBeanMetrics.getCapacityUsed(NamenodeBeanMetrics.java:519)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43){code}
> ngMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)



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