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https://issues.apache.org/jira/browse/HDDS-3070?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yiqun Lin updated HDDS-3070:
----------------------------
Status: Patch Available (was: Open)
> NPE when stop recon server while recon server was not really started before
> ---------------------------------------------------------------------------
>
> Key: HDDS-3070
> URL: https://issues.apache.org/jira/browse/HDDS-3070
> Project: Hadoop Distributed Data Store
> Issue Type: Bug
> Components: Ozone Recon
> Affects Versions: 0.4.1
> Reporter: Yiqun Lin
> Assignee: Yiqun Lin
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> I met a NPE error when I did test for Ozone. Seems the root cause is that
> recon server was not really started however we still try to stop it.
> {noformat}
> 2020-02-25 20:22:44,296 [Thread-0] ERROR ozone.MiniOzoneClusterImpl
> (MiniOzoneClusterImpl.java:build(525)) - Exception while shutting down the
> Recon.
> java.lang.NullPointerException
> at
> org.apache.hadoop.ozone.recon.tasks.ReconTaskControllerImpl.stop(ReconTaskControllerImpl.java:237)
> at
> org.apache.hadoop.ozone.recon.spi.impl.OzoneManagerServiceProviderImpl.stop(OzoneManagerServiceProviderImpl.java:229)
> at org.apache.hadoop.ozone.recon.ReconServer.stop(ReconServer.java:132)
> at
> org.apache.hadoop.ozone.MiniOzoneClusterImpl.stopRecon(MiniOzoneClusterImpl.java:470)
> at
> org.apache.hadoop.ozone.MiniOzoneClusterImpl.access$200(MiniOzoneClusterImpl.java:87)
> at
> org.apache.hadoop.ozone.MiniOzoneClusterImpl$Builder.build(MiniOzoneClusterImpl.java:523)
> at
> org.apache.hadoop.fs.ozone.TestOzoneFileSystem.testFileSystem(TestOzoneFileSystem.java:72)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> {noformat}
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