Importing a backup from Jira Cloud to Jira server fails with 'value too long for type character varying' error

Summary

context

Whenever importing a backup from Jira Cloud into Jira Server, import process will fail with error value too long for type character varying(60)

Expected results:

Restore from Jira Cloud to Jira Service finishes with no exceptions.

Actual results:

Error below is observed, whenever a customer has performed a transition in any Service Desk issue, causing a record to be created in the os_historystep table containing his username in the caller column -

Unexpected error occurred during import: org.ofbiz.core.entity.GenericEntityException: while inserting:
[GenericEntity:OSHistoryStep][owner,][caller,qm:40119c12-142a-4f0e-a336-a2c82019b1b8:5acdffd3bb811e2b3af8d635][stepId,1][actionId,41][finishDate,2018-04-19 13:09:00.271][id,12925][startDate,2018-04-19 13:08:44.666][entryId,12816][status,null] (SQL Exception while executing the following:INSERT INTO public.OS_HISTORYSTEP (ID, ENTRY_ID, STEP_ID, ACTION_ID, OWNER, START_DATE, DUE_DATE, FINISH_DATE, STATUS, CALLER) VALUES (?,?,?,?,?,?,?,?,?,?) 
(ERROR: value too long for type character varying(60)))

Workaround:

• Change the column's maximum length in the server database table by running the following command:

  ALTER TABLE os_historystep ALTER COLUMN caller TYPE character varying(255);
  

  For Microsoft SQL Server:

  ALTER TABLE os_historystep ALTER COLUMN caller NVARCHAR(255);
  

  For Oracle database:

   
  ALTER TABLE os_historystep MODIFY caller VARCHAR2(255 CHAR);