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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/09/16 02:02:38 UTC
[GitHub] [beam] ihji opened a new pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
ihji opened a new pull request #15521:
URL: https://github.com/apache/beam/pull/15521
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`ValidatesRunner` compliance status (on master branch)
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<table>
<thead>
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<th>Lang</th>
<th>ULR</th>
<th>Dataflow</th>
<th>Flink</th>
<th>Samza</th>
<th>Spark</th>
<th>Twister2</th>
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<td>Go</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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<td>Java</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Py_VR_Dataflow/lastCompletedBuild/">
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Python_VR_Flink/lastCompletedBuild/">
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<td>XLang</td>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_XVR_Direct/lastCompletedBuild/">
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Examples testing status on various runners
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<th>Lang</th>
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<td>Go</td>
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<a href="https://ci-beam.apache.org/job/beam_PreCommit_Java_Examples_Dataflow_Cron/lastCompletedBuild/">
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<td>XLang</td>
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</table>
Post-Commit SDK/Transform Integration Tests Status (on master branch)
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<th>Go</th>
<th>Java</th>
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<a href="https://ci-beam.apache.org/job/beam_PostCommit_Go/lastCompletedBuild/">
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Pre-Commit Tests Status (on master branch)
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<th>Go</th>
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<td>Non-portable</td>
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</table>
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[GitHub] [beam] ihji commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
ihji commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-931775178
I'm okay with dropping this PR. This PR just tried to get more variables into UUID generation so we can avoid only using secure random as a source. I know the chance of UUID collision is theoretically very small but still we occasionally saw some collisions between different Dataflow jobs (especially when launched from templates). Will look if there's another way to fix it.
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[GitHub] [beam] lukecwik commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-924196514
R: @lukecwik
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[GitHub] [beam] ihji closed pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
ihji closed pull request #15521:
URL: https://github.com/apache/beam/pull/15521
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[GitHub] [beam] ihji commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
ihji commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-920518004
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[GitHub] [beam] lukecwik edited a comment on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
lukecwik edited a comment on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-924196277
The random UUID is already astronomically high to not have a collision and if we saw some it would make sense to fix those seeds in docker otherwise many other aspects of random generation will be broken (e.g. certain parts of crypto)
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[GitHub] [beam] lukecwik commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-931747679
I would drop this change in favor of fixing random number generation instead since this adds complexity and UUID v3 ip addresses/timestamps can easily be duplicated in containers running in VMs because they typically have private networks where the actual host IP address is hidden away so across many VMs everyone can seemingly have the same IP address within the container.
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[GitHub] [beam] aaltay commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
aaltay commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-931637733
@lukecwik - Should we move forward with this change, in addition to looking at your suggestion related looking at the seeds?
@ihji - Could you look at the failing test? And see if you can investigate what Luke is suggesting?
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[GitHub] [beam] lukecwik commented on pull request #15521: [BEAM-12901] Use safer UUID generation in FileBasedSink
Posted by GitBox <gi...@apache.org>.
lukecwik commented on pull request #15521:
URL: https://github.com/apache/beam/pull/15521#issuecomment-924196277
The random UUID is already astronomically high to not have a collision. What warranted this change (did we see collisions due to poor random number seed generation)?
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