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https://issues.apache.org/jira/browse/HADOOP-19583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17956144#comment-17956144
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ASF GitHub Bot commented on HADOOP-19583:
-----------------------------------------

steveloughran opened a new pull request, #7725:
URL: https://github.com/apache/hadoop/pull/7725

   
   Fixes the issues in the readVectored code of raw local and s3a by casting to 
the superclass first.
   
   But it is used in many other places.
   
   
   ### How was this patch tested?
   
   waiting for yetus
   
   
   ### For code changes:
   
   - [X] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] 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?
   
   




> JDK8: RawLocalFileSystem calls ByteBuffer.flip
> ----------------------------------------------
>
>                 Key: HADOOP-19583
>                 URL: https://issues.apache.org/jira/browse/HADOOP-19583
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: common
>    Affects Versions: 3.4.2
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Major
>
> running 3.4.2 rc1 on older JDK 8 runtimes can fail
> {code}
> [INFO] -------------------------------------------------------
> [INFO] Running org.apache.parquet.hadoop.TestParquetReader
> Exception in thread "Thread-8" java.lang.NoSuchMethodError: 
> java.nio.ByteBuffer.flip()Ljava/nio/ByteBuffer;
>         at 
> org.apache.hadoop.fs.RawLocalFileSystem$AsyncHandler.completed(RawLocalFileSystem.java:428)
>         at 
> org.apache.hadoop.fs.RawLocalFileSystem$AsyncHandler.completed(RawLocalFileSystem.java:362)
>         at sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:126)
>         at 
> sun.nio.ch.SimpleAsynchronousFileChannelImpl$2.run(SimpleAsynchronousFileChannelImpl.java:335)
>         at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>         at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>         at java.lang.Thread.run(Thread.java:750)
> {code}
> this can be fixed trivially, casting to java.io.Buffer first: 
> ((Byffer)buff).flip())



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