[HADOOP-3701] Too many trash sockets and trash pipes opened

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.17.0
• Fix Version/s: 0.17.0

Environment

Linux 2.6.18-53.el5PAE #1 SMP Mon Nov 12 02:55:09 EST 2007 i686 i686 i386 GNU/Linux
jdk 1.5.0

• Assignee: Unassigned
• Reporter: He Yongqiang
• Created: 07/Jul/08 07:13
• Updated: 08/Jul/09 16:43
• Resolved: 07/Jul/08 07:33

Description

We encounted too many open files exception.
And we found the datanode server daemon has opened too many sockets and pipes. And more surprisingly,most of the sockets are connects to remote data node's 50010 port and are with state CLOSE_WAIT,such as
tcp 1 0 ::ffff:10.61.0.161:33776 ::ffff:10.61.0.162:50010 CLOSE_WAIT 27637/java off (0.00/0/0)