### _Why are the changes needed?_
This PR proposes to allow the user to provide a batch id on submitting a batch job. If the batch id already existed in metastore, Kyuubi ignores this submission and just returns the existing one, w/ a marker in response, this could avoid duplicated batch job submission.
Talking about the implementation, the key things are
How does the user set the custom batch id?
- User can optionally set the `kyuubi.batch.id` in `conf: Map[String, String]`, and the value must be a UUID, for Java users, it can be generated by `UUID.randomUUID().toString()`
How does the Kyuubi Server detect the duplication?
- It's simple in single Kyuubi Server instance case, Kyuubi just needs to look up the metastore before creating a batch job
- In HA mode, suppose the user requests to create the batch jobs w/ the same batch id concurrently, multiple Kyuubi Servers may process the request and try to insert to metastore DB at the same time, but only the first insertion success, others will fail w/ "duplicated key", Kyuubi Server needs to catch this error and return the existing batch job information instead of creating a new one.
How does the user know if the returned batch job is new created or duplicated?
- a new field `batchInfo: Map[String, String]` is added to the response, and for duplicated batch job, `"kyuubi.batch.duplicated": "true"` will be contained.
### _How was this patch tested?_
- [x] Add some test cases that check the changes thoroughly including negative and positive cases if possible
- [ ] Add screenshots for manual tests if appropriate
- [x] [Run test](https://kyuubi.readthedocs.io/en/master/develop_tools/testing.html#running-tests) locally before make a pull request
Closes#4390 from pan3793/batch-id.
Closes#4390
b6917babf [Cheng Pan] move constant to rest client
79ef1b5d8 [Cheng Pan] flaky test
f82228506 [Cheng Pan] it
88bdfa50a [Cheng Pan] ut
fd8bc222a [Cheng Pan] ut
c820f5e43 [Cheng Pan] Support user provided batch id on batch job submission
Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>
efbaaff6fb