[HDDS-11187] Fix Event Handling Corruption in OMDBUpdatesHandler to Prevent ClassCastException in Recon Server

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0, 1.4.1
• Component/s: Ozone Recon
• Labels: pull-request-available
• Target Version/s: 1.4.1
• Assignee: Arafat Khan
• Reporter: Arafat Khan
• Created: 16/Jul/24 08:06
• Updated: 31/Jul/24 03:50
• Resolved: 22/Jul/24 08:44

Description

A ClassCastException occurs in the Recon server during the FileSizeCountTask, where RepeatedOmKeyInfo is incorrectly cast to OmKeyInfo, causing task processing to fail.

 

2024-06-11 10:40:03,700 INFO org.apache.hadoop.ozone.recon.tasks.FileSizeCountTask: Completed a 'process' run of FileSizeCountTask.
2024-06-11 10:40:03,700 ERROR org.apache.hadoop.ozone.recon.tasks.ReconTaskControllerImpl: Unexpected error : 
java.util.concurrent.ExecutionException: java.lang.ClassCastException: class org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo cannot be cast to class org.apache.hadoop.ozone.om.helpers.OmKeyInfo (org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo and org.apache.hadoop.ozone.om.helpers.OmKeyInfo are in unnamed module of loader 'app')
	at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
	at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at org.apache.hadoop.ozone.recon.tasks.ReconTaskControllerImpl.processTaskResults(ReconTaskControllerImpl.java:247)
	at org.apache.hadoop.ozone.recon.tasks.ReconTaskControllerImpl.consumeOMEvents(ReconTaskControllerImpl.java:118)
	at org.apache.hadoop.ozone.recon.spi.impl.OzoneManagerServiceProviderImpl.syncDataFromOM(OzoneManagerServiceProviderImpl.java:511)
	at org.apache.hadoop.ozone.recon.spi.impl.OzoneManagerServiceProviderImpl.lambda$startSyncDataFromOM$0(OzoneManagerServiceProviderImpl.java:258)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
	at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
	at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassCastException: class org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo cannot be cast to class org.apache.hadoop.ozone.om.helpers.OmKeyInfo (org.apache.hadoop.ozone.om.helpers.RepeatedOmKeyInfo and org.apache.hadoop.ozone.om.helpers.OmKeyInfo are in unnamed module of loader 'app')
	at org.apache.hadoop.ozone.recon.tasks.NSSummaryTaskWithFSO.processWithFSO(NSSummaryTaskWithFSO.java:90)
	at org.apache.hadoop.ozone.recon.tasks.NSSummaryTask.process(NSSummaryTask.java:97)
	at org.apache.hadoop.ozone.recon.tasks.ReconTaskControllerImpl.lambda$consumeOMEvents$0(ReconTaskControllerImpl.java:113)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	... 3 more 

Issue Links

• is related to: HDDS-7926 [hsync] Recon throws ClassCastException
• is related to: HDDS-8310 Recon goes down with RepeatedOmKeyInfo cannot be cast to org.apache.hadoop.ozone.om.helpers.OmKeyInfo
• links to: GitHub Pull Request #6950