[SPARK-46621] Address null from Exception.getMessage in Py4J captured exception

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: PySpark
• Labels: pull-request-available
• Assignee: Hyukjin Kwon
• Reporter: Hyukjin Kwon
• Created: 08/Jan/24 10:06
• Updated: 08/Jan/24 14:16
• Resolved: 08/Jan/24 11:54

Description

If JVM throws an exception without a message, the message becomes null and returns:

  File "/.../pyspark/errors/exceptions/captured.py", line 88, in __str__
    desc = desc + "\n\nJVM stacktrace:\n%s" % self._stackTrace
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

Issue Links

• links to: GitHub Pull Request #44623