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From "Amichai Rothman (JIRA)" <server-...@james.apache.org>
Subject [jira] Created: (JAMES-799) dbcp causes "Address already in use: connect" exception and server fails
Date Sat, 04 Aug 2007 16:36:54 GMT
dbcp causes "Address already in use: connect" exception and server fails
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                 Key: JAMES-799
                 URL: https://issues.apache.org/jira/browse/JAMES-799
             Project: James
          Issue Type: Bug
          Components: MailStore & MailRepository
    Affects Versions: 2.3.1
         Environment: Windows XP, MySQL 4.1.22
            Reporter: Amichai Rothman


I've tried using FromRepository servlet (manual one-time configuration) to migrate a file
store with ~1.5K messages to a database store. however afte a few hundred inserts, the logs
started filling with exceptions, whose root cause is "Address already in use: connect". After
much investigation, I found out using netstat that there are thousands of ports open (all
local - both JAMES and MySQL are on the same server), and as some googled post suggested,
the available TCP ports may have been exhausted. The result was that some of the message never
made it through the conversion - the logs showed that after 3 db connection retries JAMES
gave up on them.

I tried lowering the number of threads in the db source configuration, spool configuration,
and default thread pool configuration (all in config.xml) but nothing helped. Eventually,
I reverted all my configuration attempts, and applied the single change of using mordred instead
of dbcp, and now everything works fine. I don't know if this is a JAMES or a dbcp bug, but
it's definitely unacceptible for db connections to fail when there is a bit of load on the
system (a few hundred messages).

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