Importing issues concurrently

[Rutvi Sukhadia]

Is it possible for multiple users to import issues in the Jira cloud concurrently through JSON import?

I have around 6 million issues that need to be imported to Jira cloud.

I found a Rest API that facilitates the same functionality as Jira's importer plugin where I can provide a JSON file to import the issues.

The Jira importers plugin document states that it takes around 1 hour to import 1500 issues, and as per this the import of 6 million issues would take much longer.

So, is there any way that I can use multiple users, divide the issues into different sets, maybe according to different projects, and import them concurrently to reduce the import timeline?

I checked from UI as well, if I have one import job running by user X, importing issues from JSON file - file1, and if I try to import another set of issues from JSON file2 via user Y, then I get a failure that the import is still running.

[Martin Atanasov]

There is this api:
https://developer.atlassian.com/cloud/jira/platform/rest/v3/api-group-issues/#api-rest-api-3-issue-bulk-post

unfortunately there are some fields or rather data that should be imported but it isn't as this api is a bit broken. There is problem with history, comments and status as far as I know