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https://issues.apache.org/jira/browse/HADOOP-19527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17942269#comment-17942269
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Steve Loughran commented on HADOOP-19527:
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i see...its an artifact of the md5 caching. well, at least change is detected.
and because it doesn't use the version id, you aren't accidentally getting the
older object back across open() operations. Still a major problem though.
Aren't you lucky I have a test setup which generates this failure 😁
> S3A: testVectoredReadAfterNormalRead() failing with 412 response from S3
> ------------------------------------------------------------------------
>
> Key: HADOOP-19527
> URL: https://issues.apache.org/jira/browse/HADOOP-19527
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.5.0, 3.4.2
> Reporter: Steve Loughran
> Assignee: Ahmar Suhail
> Priority: Blocker
> Labels: pull-request-available
>
> This is surfacing on a bucket using versionid for change detection: block
> reads are failing in the test
> {{ITestS3AContractAnalyticsStreamVectoredRead.testVectoredReadAfterNormalRead()}}
> {code}
> Caused by: software.amazon.awssdk.services.s3.model.S3Exception: At least one
> of the pre-conditions you specified did not hold (Service: S3, Status Code:
> 412, Request ID: 0AN2EB8QXC75HH0T, Extended Request ID:
> U5l/UnIF4n3NO1mrZVzS2vv72F3LgUoVJxR4XodUSaTWCerfjmmpH45CbFGKkTkfgfnykwzseGo=)
> at
> software.amazon.awssdk.services.s3.model.S3Exception$BuilderImpl.build(S3Exception.java:104)
> {code}
> * this is the normal readFully() call, before the vectored one
> * it worked last week
> * also found on branch-3.4 before the SDK update, so not an issue caused by
> the SDK unless my maven repo is badly contaminated
> * seems unrelated to versioning -still there when disabled.
> * applies on unversioned s3 express store too.
> About the main way I could see this surface is if the test file is less than
> the actual length of file created, so the GET is rejected for reading off the
> end (the openfile passes in the length to save the HEAD)
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