CSV Import Fails due to Illegal Group Reference Error

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Symptoms

When importing JIRA issues via CSV file, after the field mappings page, the user encounters a 500 error page as well as the below stack trace.

The following appears in the atlassian-jira.log:

2013-06-04 16:05:01,494 http-8502-8 ERROR      [500ErrorPage.jsp] Exception caught in 500 page Illegal group reference
java.lang.IllegalArgumentException: Illegal group reference
	at java.util.regex.Matcher.appendReplacement(Matcher.java:713)
	at java.util.regex.Matcher.replaceFirst(Matcher.java:861)
	at java.lang.String.replaceFirst(String.java:2146)
	at com.atlassian.jira.plugins.importer.imports.csv.web.CsvFieldMappingsPage.doValidation(CsvFieldMappingsPage.java:96)

Cause

Special characters such as the $ in the import file may not be parsed correctly and can cause the IllegalArgumentException.

Resolution

  • Edit the CSV file and remove any $ in the column headings and reimport the CSV file.

Last modified on Mar 30, 2016

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