Roman Khachatryan created FLINK-23170:
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Summary: Write metadata after materialization
Key: FLINK-23170
URL: https://issues.apache.org/jira/browse/FLINK-23170
Project: Flink
Issue Type: Sub-task
Components: Runtime / State Backends
Reporter: Roman Khachatryan
Fix For: 1.14.0
Currently, changelog state backend writes state metadata on first state access.
It is written to the changelog
On materialization, the changelog can be truncated, so the metadata needs to be
written again.
This can be achieved by resetting AbstractStateChangeLogger.metaDataWritten
flag.
It can be further optimized by storing the SQN at which the metadata was
written and only resetting the flag if materializedSqn >= metadataSqn; but
materialization is relatively rare so it probably doesn't worth it.
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