[FLINK-22593][tests] Waiting for all tasks running before triggering …

[akalash]

… the first barrier or the barrier announcement received

What is the purpose of the change

Stabiliazaing of SavepointITCase

Brief change log

• Waiting for all tasks running before calling the savepoint

Verifying this change

This change added tests and can be verified as follows:

• No changes. It is test itself

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)
• The serializers: (yes / no / don't know)
• The runtime per-record code paths (performance sensitive): (yes / no / don't know)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn/Mesos, ZooKeeper: (yes / no / don't know)
• The S3 file system connector: (yes / no / don't know)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

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Last check on commit 72a0fb3 (Sat Aug 28 12:17:53 UTC 2021)

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CI report:

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[pnowojski]

Good catch with this fix.

LGTM % could you move FileSinkMigrationITCase changes to another commit marked as a fix for [FLINK-22625]?

[akalash]

@pnowojski . I reorganized the commits.