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https://issues.apache.org/jira/browse/HADOOP-18546?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17644947#comment-17644947
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ASF GitHub Bot commented on HADOOP-18546:
-----------------------------------------

steveloughran opened a new pull request, #5198:
URL: https://github.com/apache/hadoop/pull/5198

   This is a followup to the original HADOOP-18546
   patch (#5176); cherry-picks of that should include this
   or follow up with it.
   
   Removes risk of race conditions in assertions
   of ITestReadBufferManager on the state of the in-progress and completed 
queues by removing the assertions.
   
   * Assertions that there are no in progress reads MUST be cut as there may be 
some and they won't be cancelled.
   * Assertions that the completed list is without buffers of a closed stream 
are brittle because if there was an in progress stream which completed after 
stream.close() then it will end up in the list.
   
   ### How was this patch tested?
   
   modified test run standalone; doing full test suite as well for due diligence
   
   ### For code changes:
   
   - [X] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [X] Object storage: have the integration tests been executed and the 
endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, 
`NOTICE-binary` files?
   
   




> disable purging list of in progress reads in abfs stream closed
> ---------------------------------------------------------------
>
>                 Key: HADOOP-18546
>                 URL: https://issues.apache.org/jira/browse/HADOOP-18546
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/azure
>    Affects Versions: 3.3.4
>            Reporter: Steve Loughran
>            Assignee: Pranav Saxena
>            Priority: Major
>              Labels: pull-request-available
>
> turn off the prune of in progress reads in 
> ReadBufferManager::purgeBuffersForStream
> this will ensure active prefetches for a closed stream complete. they wiill 
> then get to the completed list and hang around until evicted by timeout, but 
> at least prefetching will be safe.



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