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https://issues.apache.org/jira/browse/FLINK-7266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16168733#comment-16168733
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Elias Levy commented on FLINK-7266:
-----------------------------------
I am curious what the state of this is. It is still a problem on 1.3.2, making
use of S3 with the file system state backend very imprudent in production. You
end up with thousands of empty "directories" in S3 for the checkpoints
{code}
$ $ sudo aws s3 ls --recursive
s3://bucket/flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/
2017-09-15 23:03:15 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-1/
2017-09-15 23:04:15 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-10/
2017-09-15 23:14:07 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-100/
2017-09-15 23:14:14 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-101/
2017-09-15 23:14:20 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-102/
2017-09-15 23:15:12 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-103/
2017-09-15 23:15:18 0
flink/checkpoints/58c7604fbc543b6df75b62601a9b4c9d/chk-104/
...
{code}
> Don't attempt to delete parent directory on S3
> ----------------------------------------------
>
> Key: FLINK-7266
> URL: https://issues.apache.org/jira/browse/FLINK-7266
> Project: Flink
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.3.1
> Reporter: Stephan Ewen
> Assignee: Stephan Ewen
> Priority: Critical
> Fix For: 1.4.0, 1.3.2
>
>
> Currently, every attempted release of an S3 state object also checks if the
> "parent directory" is empty and then tries to delete it.
> Not only is that unnecessary on S3, but it is prohibitively expensive and for
> example causes S3 to throttle calls by the JobManager on checkpoint cleanup.
> The {{FileState}} must only attempt parent directory cleanup when operating
> against real file systems, not when operating against object stores.
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