[THRIFT-3140] ConcurrentModificationException is thrown by JavaScript test server

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.9.3
• Component/s: Build Process, JavaScript - Library
• Patch Info: Patch Available
• Flags: Patch
• Assignee: Nobuaki Sukegawa
• Reporter: Nobuaki Sukegawa
• Created: 10/May/15 15:01
• Updated: 21/Jul/15 02:21
• Resolved: 10/May/15 16:31

Description

After running make check for JS or ant test in lib/js/test, you can always find several ConcurrentModificationException stack traces in lib/js/test/build/log/unittest.log.

I don't know if it's even a bug since it does not cause any test failures.
It distracted me from solving real cause of failures for a while through.

Cause:
Threading issue.
Synchronization is needed because all instances of MimeUtil2 seems to share single state.
http://sourceforge.net/p/mime-util/bugs/33/