[HDDS-3070] NPE when stop recon server while recon server was not really started before

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.4.1
• Fix Version/s: 0.5.0
• Component/s: Ozone Recon
• Labels: pull-request-available
• Assignee: Yiqun Lin
• Reporter: Yiqun Lin
• Created: 25/Feb/20 13:29
• Updated: 27/Feb/20 21:48
• Resolved: 25/Feb/20 19:30

Description

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.

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)

Issue Links

• links to: GitHub Pull Request #603