[FTPSERVER-241] Socket file descriptors leak leading to "Too Many Files Open" using FTP/S

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.0-M2, 1.0.0-M3, 1.0.0-M4
• Fix Version/s: 1.0.0-RC1
• Component/s: Server
• Environment: Linux & Win + JRE newer than 1.5.0_11
• Assignee: Niklas Therning
• Reporter: Fred Moore
• Created: 14/Dec/08 14:01
• Updated: 14/Jan/09 16:38
• Resolved: 14/Dec/08 21:56

Description

This documented JVM bug "SSLServerSocket file descriptor leak" (http://bugs.sun.com/view_bug.do?bug_id=6764972) affects FTPServer in FTP/S mode and eventually leads to a "Too Many Files Open" condition on Linux (and equivalent platform-dependent condition on windows).

For workaround hints see:
http://www.nabble.com/-security-dev-00402-:-Re:-NullPointerException-at%09sun.security.ssl.OutputRecord.writeBuffer-td20492154.html

See also this discussion thread on FTPServer mailing list:
http://mail-archives.apache.org/mod_mbox/mina-ftpserver-users/200812.mbox/browser