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https://issues.apache.org/jira/browse/FLINK-10531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16679597#comment-16679597
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ASF GitHub Bot commented on FLINK-10531:
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StefanRRichter commented on issue #7036: [FLINK-10531][e2e] Fix unstable TTL
end-to-end test.
URL: https://github.com/apache/flink/pull/7036#issuecomment-436954874
I wonder if it would not make more sense to use a monotonous time provider
for a single machine, such as `System.nanoTime()`, or a wrapper around time
millis that prevents falling back in time, or some test implementation that the
test can control, for the test instead of ignoring elements and potentially
missing out on errors. `TtlTimeProvider` is already an interface, and
`TtlTimeProvider DEFAULT = System::currentTimeMillis;` is used in all places.
Instead this could be the first case where we want to make the time provider
configurable via a factor. The simplest case could just replace it when
encountering a certain config entry or property.
Another option would be that if we detect such time changes we exit the test
with a certain exit code and rerun it again. What do you think?
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> State TTL RocksDb backend end-to-end test failed on Travis
> ----------------------------------------------------------
>
> Key: FLINK-10531
> URL: https://issues.apache.org/jira/browse/FLINK-10531
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.6.1
> Reporter: Till Rohrmann
> Assignee: Kostas Kloudas
> Priority: Critical
> Labels: pull-request-available, test-stability
> Fix For: 1.7.0
>
>
> The {{State TTL RocksDb backend end-to-end test}} end-to-end test failed on
> Travis.
> https://travis-ci.org/apache/flink/jobs/438226190
> https://api.travis-ci.org/v3/job/438226190/log.txt
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