[jira] [Work started] (HDFS-14030) Add query whether storage has been initialized to DN's JMXBean

["Adam Antal (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-14030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HDFS-14030 started by Adam Antal.
-----------------------------------------
> Add query whether storage has been initialized to DN's JMXBean
> --------------------------------------------------------------
>
>                 Key: HDFS-14030
>                 URL: https://issues.apache.org/jira/browse/HDFS-14030
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs
>            Reporter: Adam Antal
>            Assignee: Adam Antal
>            Priority: Minor
>
> During the short period while the DN is starting and the storage is not yet available we get the following errors:
> {noformat}
> ERROR org.apache.hadoop.jmx.JMXJsonServlet: getting attribute VolumeInfo of Hadoop:service=DataNode,name=DataNodeInfo threw an exception
> javax.management.RuntimeMBeanException: java.lang.NullPointerException: Storage not yet initialized
> {noformat}
> I suggest to add an option to the DataNodeMXBean to query whether the storage has been initialized or not to surpass the exception.



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