Aljoscha Krettek created FLINK-7783:
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Summary: Don't always remove checkpoints
ZooKeeperCompletedCheckpointStore#recover()
Key: FLINK-7783
URL: https://issues.apache.org/jira/browse/FLINK-7783
Project: Flink
Issue Type: Sub-task
Components: State Backends, Checkpointing
Affects Versions: 1.3.2, 1.4.0
Reporter: Aljoscha Krettek
Priority: Blocker
Fix For: 1.4.0, 1.3.3
Currently, we always delete checkpoint handles if they (or the data from the
DFS) cannot be read:
https://github.com/apache/flink/blob/91a4b276171afb760bfff9ccf30593e648e91dfb/flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/ZooKeeperCompletedCheckpointStore.java#L180
This can lead to problems in case the DFS is temporarily now available, i.e. we
could inadvertently
delete all checkpoints even though they are still valid.
A user reported this problem on the mailing list:
https://lists.apache.org/thread.html/9dc9b719cf8449067ad01114fedb75d1beac7b4dff171acdcc24903d@%3Cuser.flink.apache.org%3E
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