GitHub user tillrohrmann opened a pull request:
https://github.com/apache/flink/pull/4548
[FLINK-7457] Make Dispatcher highly available
## What is the purpose of the change
This commit introduces a dispatcher leader election and retrieval service
to the
HighAvailabilityServices. Moreover it adds code such that the Dispatcher
now takes
part in the leader election process using the afore-mentioned services.
Let Dispatcher participate in leader election
Add test for Dispatcher leader election
## Brief change log
- Introduce `LeaderElectionService` and `LeaderElectionRetrievalService`
for the `Dispatcher` to the `HighAvailabililtyServices`
- Let the `Dispatcher participate in the leader election process
- Guard `Dispatcher#submitJob` with leader session id
## Verifying this change
This change added tests and can be verified as follows:
- Added `DispatcherTest#testLeaderElection` which simulates a leader
election process
## 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)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Yarn/Mesos, ZooKeeper: (no)
## Documentation
- Does this pull request introduce a new feature? (no)
- If yes, how is the feature documented? (not applicable)
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tillrohrmann/flink addDispatcherHA
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4548.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4548
----
commit 9be93a9814ac0727015710f6764ce5e6a4166ea7
Author: Till Rohrmann <[email protected]>
Date: 2017-08-16T12:36:13Z
[FLINK-7457] Make Dispatcher highly available
This commit introduces a dispatcher leader election and retrieval service
to the
HighAvailabilityServices. Moreover it adds code such that the Dispatcher
now takes
part in the leader election process using the afore-mentioned services.
Let Dispatcher participate in leader election
Add test for Dispatcher leader election
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