Failed importing issues in JSON format

Question

Initially it looked liked having passed all the steps of verification, but in the end it produced no result with 0 issue imported.

log:

2023-01-25 02:58:30,809 INFO - Import started by 62f13692b5b801a9aff086d5 using com.atlassian.jira.plugins.importer.sample.SampleDataBean 
2023-01-25 02:58:30,827 INFO - ------------------------------ 
2023-01-25 02:58:30,827 INFO - Importing: Users 
2023-01-25 02:58:30,827 INFO - ------------------------------ 
2023-01-25 02:58:30,827 INFO - Only new items will be imported 
2023-01-25 02:58:30,833 INFO - 0 users associated with import. All of them imported as inactive, this can be changed after import in User Access step. 
2023-01-25 02:58:30,834 INFO - ------------------------------ 
2023-01-25 02:58:30,834 INFO - Finished Importing : Users 
2023-01-25 02:58:30,834 INFO - ------------------------------ 
2023-01-25 02:58:30,834 INFO - 0 users successfully created. 
2023-01-25 02:58:30,837 INFO - Retrieving projects... 
2023-01-25 02:58:30,850 INFO - ------------------------------ 
2023-01-25 02:58:30,850 INFO - Importing: Issues 
2023-01-25 02:58:30,850 INFO - ------------------------------ 
2023-01-25 02:58:30,850 INFO - Only new items will be imported 
2023-01-25 02:58:30,855 INFO - 0 issues successfully created 
2023-01-25 02:58:30,858 INFO - ------------------------------ 
2023-01-25 02:58:30,858 INFO - Finished Importing : Issues 
2023-01-25 02:58:30,858 INFO - ------------------------------ 
2023-01-25 02:58:30,865 INFO - ------------------------------ 
2023-01-25 02:58:30,865 INFO - Importing: Issue Links & Subtasks 
2023-01-25 02:58:30,865 INFO - ------------------------------ 
2023-01-25 02:58:30,865 INFO - Only new items will be imported 
2023-01-25 02:58:30,868 INFO - ------------------------------ 
2023-01-25 02:58:30,868 INFO - Finished Importing : Issue Links & Subtasks 
2023-01-25 02:58:30,868 INFO - ------------------------------ 
2023-01-25 02:58:30,869 INFO - ------------------------------ 
2023-01-25 02:58:30,869 INFO - Importing: Issue remote links 
2023-01-25 02:58:30,869 INFO - ------------------------------ 
2023-01-25 02:58:30,869 INFO - Only new items will be imported 
2023-01-25 02:58:30,871 INFO - ------------------------------ 
2023-01-25 02:58:30,872 INFO - Finished Importing : Issue remote links

Prince Nyeche - ELFAPP · Answer

I'm assuming you mean you've used the JSON importer option in the external system import. If yes, it looks like you were trying to update already existing issues within your JSM project. The JSON importer is a very complicated import process. One that you cannot do if the issues already exist. Why you get 0 imported issues is a result that the project where you're performing such an import already exists with some of the issues present prior to your import. Just note that with JSON importer, you cannot update existing issues, you have to start from scratch. I would say if you're not keen on preserving the issue history, then the CSV importer would be a much easier and more straightforward approach

Nic Brough -Adaptavist- · Answer

Welcome to the Atlassian Community!

What import are you actually running here?  And what does your data look like?