GitLab.com for Jira Cloud app sometimes doesn't sync builds
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### Summary
It looks like synchronizing build data with Jira is inconsistent. We use the [`/rest/builds/0.1/bulk`](https://developer.atlassian.com/cloud/jira/software/rest/api-group-builds/) endpoint to send data to Jira
Looking at the [background worker logs](https://log.gprd.gitlab.net/goto/68d900e0-7e9d-11ec-a649-b7cbb8e4f62e) we see some failures, but they don't seem to be related to the missing builds. However, if we check [JiraConnect integration logs](https://log.gprd.gitlab.net/goto/22f41080-891d-11ec-a649-b7cbb8e4f62e) there are some error responses:
```
{"errorMessages":["Instantiation of [simple type, class com.atlassian.jira.plugin.devstatus.devinfo.schema.DevInformationTOImpl] value failed: null"]}
```
(Logged at Feb 8, 2022 @ 10:32:50.868)
and
**Note:** This has been a bug in our logging where we treaded HTTP `202` responses as `"Unknown error"`. This has been fixed with https://gitlab.com/gitlab-org/gitlab/-/merge_requests/81986. More details [here](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/81986#note_861316567)
```
{"errorMessages":["Unknown error"],"response":{"unknownIssueKeys":[],"acceptedBuilds":[{"pipelineId":"35741210","buildNumber":3}],"rejectedBuilds":[]}}
```
(Logged at Feb 8, 2022 @ 09:46:00.282)
### What should be checked
We should, set up the Jira Cloud App and some environment, and try to use combination of Jira keys, namely in:
* branch name
* commit message
* MR title
* MR description
* combination of both MR (title and description)
Validate that it works for all of them, and the builds are displayed under the issue's detail page.
### Steps to reproduce
1. Start a Gitpod for the `gitlab-org/gitlab` project.
1. [Enable runners](https://gitlab.com/gitlab-org/gitlab-development-kit/-/blob/main/doc/howto/gitpod.md#enable-runners).
1. Create a project with a `.gitlab-ci.yml` file.
1. Create an MR on that project and trigger builds until one fails.
**In addition to the steps above, we could reproduce the missing deployments/builds problem:**
- Branch containing JIRA issue key
1. Create a branch that contains Jira issue key (e.g.: `MYPROJECT-123`)
2. Create an MR without issue keys in the title or description
3. Validate that the correct issue has been linked in the summary page
- MR title containing JIRA issue key
1. Create an MR with JIRA issue keys only in the title
2. Validate that the correct issue has been linked in the summary page
- MR description containing JIRA issue key
1. Create an MR with JIRA issue keys only in the description
2. Validate that the JIRA issue is **not synchronized** in the summary page
_As we can see that issue is only when JIRA issue keys are stored in the MR's description._
**note**: Having an issue key in title and description works as expected.
### Example Project
https://gitlab.com/cmutua-free-group/feb7-jira-builds/-/merge_requests/1
### What is the current *bug* behavior?
Sometimes build data doesn't show up in Jira
### What is the expected *correct* behavior?
Builds should reliably show up in Jira
### Relevant logs and/or screenshots
See summary
### Output of checks
This bug happens on GitLab.com
### Possible fixes
1. #390888+ this will probably fix #352411
See [discussion](https://gitlab.com/gitlab-org/gitlab/-/issues/352411#note_1271225923).
### Additional follow-up improvements from our investigation
1. https://gitlab.com/gitlab-org/gitlab/-/issues/354373+
1. #390887+ I think this will not be visible for users and more of an performance improvement because we don't have to send data that gets rejected by Jira anyway.
1. https://gitlab.com/gitlab-org/gitlab/-/issues/390889+ This is probably also a performance improvement.
See [discussion](https://gitlab.com/gitlab-org/gitlab/-/issues/352411#note_1271225923).
### Customer impact
- [Ultimate, 113 users](https://gitlab.my.salesforce.com/0014M00001ySB9zQAG)
- [Premium, 15 users](https://gitlab.my.salesforce.com/0014M00001sG45mQAC)
- [Premium, 8 users](https://gitlab.my.salesforce.com/0014M00001kDyxsQAC)
Per our [Prioritization Table](https://app.periscopedata.com/app/gitlab:safe-intermediate-dashboard/970771/User-Request-Issue-Prioritization---Product), this issue ranks 18 with a priority score of 299k, which I would rate as fairly high impact. That said, we do have some higher priority issues in our current plans.
issue
GitLab AI Context
Project: gitlab-org/gitlab
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