Hey,
thanks for replying..
I forgot to mention that we have a Apache being a loadbalancer in front of
these two tomcats. The Apache uses port 8080.
Let me start with André Warnier:
Both of the tomcats are "synchronising" them self. The send some serialized
objects via http to each other. And both of them getting some file from SMB
shares. But I can't imagine that might be the problem?
I'm wondering why the tcp connections with state "CLOSE_WAIT" doesn't get
closed.
Here are the requested connectors
tomcat1:
<Connector port="7080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector executor="tomcatThreadPool"
port="7080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
maxThreads="150" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS" />
<Connector port="7009" protocol="AJP/1.3" redirectPort="8443" />
tomcat2:
<Connector port="9080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="9443" />
<Connector executor="tomcatThreadPool"
port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" />
<Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
maxThreads="150" scheme="https" secure="true"
clientAuth="false" sslProtocol="TLS" />
<Connector port="9009" protocol="AJP/1.3" redirectPort="9443" />
Yeah I'm sure its port 7090, as you can see above.. :-)
7009 is used by AJP!?
As I had to restart the server, I don't know who was the owner of that PID.
Right now we do have 2 or 3 of:
java 9495 tomcat 201u IPv6 1866645 0t0 TCP
localhost:afs3-rmtsys->localhost:55116 (ESTABLISHED)
If I run ulimit -n with the tomcat user I get: 1024. But I did set the max open
files at the startscript for each tomcat (init.d) with:
ulimit -Hn 4096
ulimit -Sn 4096
And if I check the files for the current tomcat process (cat proc/9180/limits
while 9180 is one of my tomcat PIDs) I get:
Max open files 4096 4096 files
Thanks again..
Mit freundlichen Grüßen
David Kumar
Softwareentwickler, B. Sc.
Abteilung Infotech - Interaktiv
TELESTAR-DIGITAL GmbH
Am Weiher 14
D-56766 Ulmen
http://www.telestar.de/
-----Ursprüngliche Nachricht-----
Von: Christopher Schultz [mailto:[email protected]]
Gesendet: Mittwoch, 16. Januar 2013 19:14
An: Tomcat Users List
Betreff: Re: afs3-rmtsys: connections keept open
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David,
On 1/16/13 10:52 AM, David Kumar wrote:
> We got some serious trouble with our tomcats. Basically we using
> two 7.0.12 tomcats on a single Debian 6.0. One is running on port
> 7090 and the other on 9080. Time after time both tomcats are
> crashing. I found too many open files in tomcatlogfiles.
Bummer.
> Both Servers are running with one user (TOMCAT).
Can you post the <Connector> parts of your server.xml files (from both
Tomcat configurations)?
Also, what does `ulimit -n` return from an otherwise unmodified shell
running as the user who owns Tomcat processes?
> After changing max open files for that particular user I was able
> to get more than 1024 open files. Currently I'm checking log files
> every few minutes. With lsof|grep tomcat|wc -l I'm counting the
> open files by user. Usually there are around 600-700 open files.
> But sometimes the count grows and we have more than 1200 open
> files.
You'll get file handled opened for both real files (like /tmp/foo,
etc.) and for socket connections. If you aren't careful, you can have
a configuration that will work for a while bit tip-over under load.
> When ever the server does have so many open files I checked: lsof
> -u tomcat an figured out there are many connection waiting to be
> closed. The connections are looking like this:
>
> java 22312 tomcat 153u IPv6 1508517 0t0
> TCP localhost:afs3-rmtsys->localhost:50127 (CLOSE_WAIT)
Are you sure your port is 7090 and not 7009? Is 22312 the right
process id for Tomcat? The well-known port number for the
"afs3-rmtsys" service is 7009. It would be odd, though, for your Java
process to be calling *out* from a port like that ... usually you get
a high-numbered port when making an outgoing connection. Who owns
localhost:50127 in that case?
- -chris
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