The following comment has been added to this issue:
Author: Noel J. Bergman
Created: Thu, 15 Apr 2004 7:12 PM
Body:
The problem occurs in mordred and may be JVM specific. When the problem occurs, the
smtpserver log shows a series of connections, but no messages, followed by a series of
idle timeout messages without any subsequent log entries. A thread dump taken at that
time shows that all of the handler threads (and often others) are waiting in mordred
for a connection. All of them were waiting to enter a synchronized block, but nothing
was shown as holding that block.
Reportedly, this is a sign of a problem present in Sun JVM 1.4.0 and 1.4.1. It seems
to have been exacerbated by the fix for JAMES-253.
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View this comment:
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View the issue:
http://issues.apache.org/jira/browse/JAMES-254
Here is an overview of the issue:
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Key: JAMES-254
Summary: Connections not always recovered when idle timeout
Type: Bug
Status: Open
Priority: Major
Project: James
Components:
SMTPServer
POP3Server
NNTPServer & Repository
Remote Manager
Versions:
2.2.0a18
Assignee: Noel J. Bergman
Reporter: Noel J. Bergman
Created: Wed, 14 Apr 2004 8:49 PM
Updated: Thu, 15 Apr 2004 7:12 PM
Environment: RH 8, Sun JDK 1.4.1_02
Description:
This definitely (empirically) effects SMTPServer. It may also effect the other
protocol handlers, since their structures are all the same.
What was observed was a whole bunch of DHCP clients (almost certainly spambots)
connected, never closed, caused max connection errors, finally idled out, but were
never released back to the manager.
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