I never received any response to this. It's getting more serious. I
have a Tomcat application on the same server (i.e. smtp server is
localhost) that sends out a couple of hundred individual emails in a
loop. It's been working for a couple of years without problems. Last
night, it got halfway through the list and then started failing on each
SMTP call with "Connection Reset" messages. This is from my Tomcat log:
SMTPClient.sendMail() exception: javax.mail.MessagingException:
Exception reading response;
nested exception is:
java.net.SocketException: Connection reset
There is obviously something wrong somewhere. These are connections
between SMTP client code and JAMES on localhost. I guarantee I'm not
doing anything in my code to reset these connections.
Can someone please explain what is happening to cause all of these
connection resets in James?
Thanks.
Jerry
Jerry M wrote:
I am getting ~3500 unique "Connection Reset" error messages in the
SMTP log each day. Some are to the same host. But about 2500 of the
errors are to unique hosts.
Example messages (I removed the stack traces that follow each message
in the log...)
10/12/07 03:10:55 ERROR smtpserver: Socket to X24.D-IP06.lipetsk.ru
(195.34.253.24) closed remotely.
10/12/07 03:11:11 ERROR smtpserver: Socket to 118.175.74.69
(118.175.74.69) closed remotely.
10/12/07 03:11:43 ERROR smtpserver: Socket to ipa10.42.91.tellas.gr
(91.140.42.10) closed remotely.
I suspect that much of this is spam. But I'm not sure all of it is.
And even if it's spam, why is the TCPIP layer failing?
This has been going on for quite some time. I'm still getting mail
through the system. But I'm really concerned. This just doesn't seem
right. Can someone explain what is happening here? It doesn't say
'timeout'. And I have trouble believing that 2000-3000 servers each
day are closing connections to my server, and somehow it's all their
problem and not mine.
Basically, is this normal? What is happening in the protocol in
communicating with these thousands of servers that is not correct? If
these aren't "real" errors, then I'd really like to get these messages
out of the logs so I have a reasonable chance of finding the real
errors that I need to deal with. If this is not normal to have this
many of these errors per day, please tell me what is wrong with my
server.
BTW.... I'm watching my CPU utilization, and it's barely moving off of
zero most of the day. So this is not resulting from an overloaded
system or anything.
Suggestions? Comments?
Thanks.
Jerry
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