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https://issues.apache.org/jira/browse/HADOOP-17812?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17387983#comment-17387983
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Steve Loughran commented on HADOOP-17812:
-----------------------------------------
thanks for the test results.
* the only detail we worry about is endpoint, e.g "us-east-1"; it's also good
to include maven command line, eg. "-Dparallel-tests -DtestsThreadCount=5
-Dmarkers=delete -Dscale "
* distcp timeout is a recurrent one. I need to fix that test by reducing the
#of files/dirs copied. Too brittle and also hurts abfs test
* the landsat tests are new, caused by AWS locking their landsat-pds bucket. I
had hoped it was going to stay readable, at least with the gz file. Must have
happened this week, and you are the first person to hit it. unrelated, but it
is stopping the full scale random IO tests from working, which is a PITA.
> NPE in S3AInputStream read() after failure to reconnect to store
> ----------------------------------------------------------------
>
> Key: HADOOP-17812
> URL: https://issues.apache.org/jira/browse/HADOOP-17812
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs/s3
> Affects Versions: 3.2.2, 3.3.1
> Reporter: Bobby Wang
> Priority: Major
> Labels: pull-request-available
> Attachments: s3a-test.tar.gz
>
> Time Spent: 2.5h
> Remaining Estimate: 0h
>
> when [reading from S3a
> storage|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L450],
> SSLException (which extends IOException) happens, which will trigger
> [onReadFailure|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L458].
> onReadFailure calls "reopen". it will first close the original
> *wrappedStream* and set *wrappedStream = null*, and then it will try to
> [re-get
> *wrappedStream*|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L184].
> But what if the previous code [obtaining
> S3Object|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L183]
> throw exception, then "wrappedStream" will be null.
> And the
> [retry|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L446]
> mechanism may re-execute the
> [wrappedStream.read|https://github.com/apache/hadoop/blob/rel/release-3.2.0/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java#L450]
> and cause NPE.
>
> For more details, please refer to
> [https://github.com/NVIDIA/spark-rapids/issues/2915]
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