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https://issues.apache.org/jira/browse/NIFI-6367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16918182#comment-16918182
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ASF subversion and git services commented on NIFI-6367:
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Commit e2ca50e66a3b1a7d810ea8eac256d21bca3fd07f in nifi's branch
refs/heads/master from Evan Reynolds
[ https://gitbox.apache.org/repos/asf?p=nifi.git;h=e2ca50e ]
NIFI-6367 - This closes #3563. more error handling for FetchS3Object
Signed-off-by: Joe Witt <joew...@apache.org>
> FetchS3Processor responds to md5 error on download by doing download again,
> again, and again
> --------------------------------------------------------------------------------------------
>
> Key: NIFI-6367
> URL: https://issues.apache.org/jira/browse/NIFI-6367
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.7.1
> Environment: NIFI (CentOS 7.2) with FetchS3Object running towards S3
> enviroment (non public). Enviroment / S3 had errors that introduced md5
> errors on sub 0.5% of downloads. Downloads with md5 errors accumulated in the
> input que of the processor.
> Reporter: Kefevs Pirkibo
> Assignee: Evan Reynolds
> Priority: Critical
> Fix For: 1.10.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> (6months old, but don't see changes in the relevant parts of the code, though
> I might be mistaken. This might be hard to replicate, so suggest a code
> wizard check if this is still a problem. )
> Case: NIFI running with FetchS3Object processor(s) towards S3 enviroment (non
> public). The enviroment and S3 had in combination hardware errors that
> resulted in sporadic md5 errors on the same files over and over again. Md5
> errors resulted in an unhandled AmazonClientException, and the file was
> downloaded yet again. (Reverted to the input que, first in line.) In our case
> this was identified after a number of days, with substantial bandwidth usage.
> It did not help that the FetchS3Objects where running with multiple
> instances, and after days accumulated the bad md5 checksum files for
> continuous download.
> Suggest: Someone code savy check what happens to files that are downloaded
> with bad md5, if they are reverted to the que due to uncought exception or
> other means, then this is still a potential problem.
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