CSV import with large data throws error.

Summary

When trying to perform csv import with large data set cause the error jira.importer.plugin.csv.field.mapping.page.too.many.mappings.values

Steps to reproduce

1. Import the attached Mock_DataNew.csv with the option Map field value option.
2. The error will be reproduce when you try to import.

Expected result

Import is successful with no error.

Actual result

The import failed with the error jira.importer.plugin.csv.field.mapping.page.too.many.mappings.values

Notes

• When the option Map field value is removed for some fileds, it moves to the next screen (mapping) however, the performance degrades significantly (JIRA is not accessible).
• There are 24 columns and 1000 rows in the attached csv

Workaround

Reduce the amount of data (rows).