Dawid Wysakowicz created FLINK-25952:
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Summary: Savepoint on S3 are not relocatable even if entropy
injection is not enabled
Key: FLINK-25952
URL: https://issues.apache.org/jira/browse/FLINK-25952
Project: Flink
Issue Type: Bug
Components: FileSystems, Runtime / Checkpointing
Affects Versions: 1.14.3, 1.13.5, 1.15.0
Reporter: Dawid Wysakowicz
Assignee: Dawid Wysakowicz
Fix For: 1.15.0, 1.14.4, 1.13.7
We have a limitation that if we create savepoints with an injected entropy,
they are not relocatable
(https://nightlies.apache.org/flink/flink-docs-master/docs/ops/state/savepoints/#triggering-savepoints).
However the check if we use the entropy is flawed. In
{{FsCheckpointStreamFactory}} we check only if the used filesystem extends from
{{EntropyInjectingFileSystem}}. {{FlinkS3FileSystem}} does, but it still may
have the entropy disabled. {{FlinkS3FileSystem#getEntropyInjectionKey}} may
still return {{null}}. We should check for that in
{{org.apache.flink.core.fs.EntropyInjector#isEntropyInjecting}}
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