gaborgsomogyi opened a new pull request, #22325:
URL: https://github.com/apache/flink/pull/22325
## What is the purpose of the change
At the moment there are no delegation tokens available when HA services is
starting. If the HA services uses an external file system where the
authentication type is delegation token based (typically S3) then it throws and
exception since there are no credentials.
In this PR I've moved the delegation token manager initialization before HA
services and trigger a manual token obtain + local JVM receiver propagation.
Additionally deferred base directory creation in `FileSystemBlobStore` and
`FileSystemJobResultStore`.
## Brief change log
* The delegation token manager initialization moved before HA services and
trigger a manual token obtain + local JVM receiver propagation. This is the
solution for the job manager side.
* Deferred base directory creation in `FileSystemBlobStore` and
`FileSystemJobResultStore`. This is the solution for the task manager side.
* Changed the `DelegationTokenManager` API documentation for better clarity
* Changed a log message for better clarity
## Verifying this change
Manually on cluster.
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: yes
- The serializers: no
- The runtime per-record code paths (performance sensitive): no
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
- The S3 file system connector: no
## Documentation
- Does this pull request introduce a new feature? no
- If yes, how is the feature documented? not applicable
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