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https://issues.apache.org/jira/browse/FLINK-5908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nico Kruber updated FLINK-5908:
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Component/s: Network
> Blob Cache can (rarely) get corrupted on failed blob downloads
> --------------------------------------------------------------
>
> Key: FLINK-5908
> URL: https://issues.apache.org/jira/browse/FLINK-5908
> Project: Flink
> Issue Type: Bug
> Components: Distributed Coordination, Network
> Affects Versions: 1.2.0, 1.3.0, 1.4.0
> Reporter: Stephan Ewen
>
> The Blob Cache downloads files directly to the target file location.
> While it tries to clean up failed attempts, there is a change that this
> cleanup does not complete.
> In that case, we have a corrupt file at the target location. The blob cache
> then assumes that it already has the file cached already and future requests
> do not attempt to re-download the file.
> The fix would be to download to a temp file name, validate the integrity, and
> rename to the target file path when the validation succeeds.
> The validation for "content addressable" could even include validating the
> checksum hash.
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