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https://issues.apache.org/jira/browse/HADOOP-15827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642397#comment-16642397
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Gabor Bota edited comment on HADOOP-15827 at 10/8/18 9:32 PM:
--------------------------------------------------------------
Thanks, it makes sense now. I was able to reproduce the issue injecting
{{dirPathMeta=null}} in readOp while debugging.
The solution will be just to change
{code:java}
return (metas.isEmpty() && dirPathMeta == null)
{code}
to this
{code:java}
return (metas.isEmpty() || dirPathMeta == null)
{code}
I'll upload a patch but without a test - it wouldn't be trivial to do the test,
but I'll try if needed.
was (Author: gabor.bota):
Thanks, it makes sense now. I was able to reproduce the issue injecting
{{dirPathMeta=null}} in readOp while debugging.
The solution will be just to change
{code:java}
return (metas.isEmpty() && dirPathMeta == null)
{code}
to this
{code:java}
return (metas.isEmpty() || dirPathMeta == null)
{code}
I'll upload a patch but without a test - it would be a pain to write
integration test for this. I hope that's acceptable.
> NPE in DynamoDBMetadataStore.lambda$listChildren for root + auth s3guard
> ------------------------------------------------------------------------
>
> Key: HADOOP-15827
> URL: https://issues.apache.org/jira/browse/HADOOP-15827
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Gabor Bota
> Priority: Blocker
> Attachments: HADOOP-15827.001.patch
>
>
> NPE in a test run of {{-Dparallel-tests -DtestsThreadCount=6 -Ds3guard
> -Ddynamodb -Dauthoritative}}
> {code}
> [ERROR] testLSRootDir(org.apache.hadoop.fs.s3a.ITestS3AFileSystemContract)
> Time elapsed: 42.822 s <<< ERROR!
> java.lang.NullPointerException
> {code}
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