Hi!
I don't know IIS but maybe the patch could help.
This is not an official patch. WindowsServer2003-KB931311 can be retrieved
by calling microsoft support.
But I can also send you the patch if you can't get it.
Romain
Per Johnsson wrote:
>
> Hi!
> I wonder if this is the same problem we have, but we are using IIS6 and
> isapi_redirect.dll and if I'm not totally wrong the same codebase is
> used for apache and iis.
>
> We have come to the conclusion that there is a error in the "free
> memory" causing a crash when the pool workers of the iis is unloaded,
> unfortunaly we have not managed to see what is causing the error.
>
> Am I wrong or is this a Win 2003 Server error which can be helped with
> the suggested patch.
>
> I wrote a longer mail about our problems:
>
> http://marc.theaimsgroup.com/?l=tomcat-user&m=117092232007880&w=2
>
>
> /Per Jonsson
>
> -----Original Message-----
> From: RChartier [mailto:chartier.romain@(protected)]
> Sent: den 9 februari 2007 16:00
> To: users@(protected)
> Subject: Re: [OT] Apache mod_jk memory leak?
>
>
> Hi,
>
> I am using Apache 2.0.59 and Tomcat 5.0.28 with mod_jk 1.2.20 on Windows
> 2003 SP1 but the system have some issue on the socket layer. In fact,
> after some time, some users are able to crash our architecture: apache
> answers to request such as *.html but mod_jk says it cannot connect to
> tomcat. Even a restart of services doesn't change anythink. Tomcat is
> running and answer for simple "hello world" jsp pages but cannot answer
> to /manage/html.
>
> I have exacltly the same error logs and thread dumps as you are.
>
> I patch windows with KB 931311 and it seems to work properly.
>
>
> JNeuhoff wrote:
>>
>> I have just managed to repeat the error. 2 of us, from 2 different
>> workstations, hammered our website for a minute, by rapidly clicking
>> on links within the same site before it ended up always responding
>> with a standard Error 503 (Service unavailable) coming from the Apache
> frontend.
>> I checked all the log files, and again the only errors recorded were
>> found in the mod_jk.log:
>>
>> ....
>> [Fri Jan 19 11:34:42 2007] [0404:2392] [info] mod_jk.c (2142):
>> Service error=0 for worker=ajp13 [Fri Jan 19 11:34:42 2007]
>> [0404:2388] [error] jk_ajp_common.c (948):
>> (ajp13) can't receive the response message from tomcat, network
>> problems or tomcat is down (127.0.0.1:8009), err=-53 [Fri Jan 19
>> 11:34:42 2007] [0404:2388] [error] jk_ajp_common.c (1566):
>> (ajp13) Tomcat is down or refused connection. No response has been
>> sent to the client (yet) [Fri Jan 19 11:34:42 2007] [0404:2388] [info]
>
>> jk_ajp_common.c (1877):
>> (ajp13) receiving from tomcat failed, recoverable operation attempt=1
>> [Fri Jan 19 11:34:42 2007] [0404:2388] [info] jk_ajp_common.c (1916):
>> (ajp13) sending request to tomcat failed, recoverable operation
>> attempt=2 [Fri Jan 19 11:34:42 2007] [0404:2388] [error]
> jk_ajp_common.c (1928):
>> (ajp13) Connecting to tomcat failed. Tomcat is probably not started or
>
>> is listening on the wrong port ....
>>
>>
>> The 2 connections between Apache and Tomcat according the the netstat
>> -a command just after the web server started the 503 (Service
>> unavilable) responses (hightlighted in bold):
>>
>> Proto Local Address Foreign Address State
>> TCP DAOHPRW2:epmap DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:microsoft-ds DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:1078 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:3389 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:8009 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:8080 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:10000 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:2093 DAOHPRW2.essex.ac.uk:8009 TIME_WAIT
>> TCP DAOHPRW2:2110 DAOHPRW2.essex.ac.uk:8009 TIME_WAIT
>> TCP DAOHPRW2:8005 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:netbios-ssn DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:2076 daohprp2.essex.ac.uk:3306 ESTABLISHED
>> TCP DAOHPRW2:2077 daohprp2.essex.ac.uk:microsoft-ds
>> TIME_WAIT
>> TCP DAOHPRW2:2176 sernt29.essex.ac.uk:epmap ESTABLISHED
>> TCP DAOHPRW2:2177 sernt29.essex.ac.uk:1025 ESTABLISHED
>> TCP DAOHPRW2:2181 sernt29.essex.ac.uk:microsoft-ds
>> TIME_WAIT
>> TCP DAOHPRW2:2194 sernt50.essex.ac.uk:epmap ESTABLISHED
>> TCP DAOHPRW2:2204 sernt5.essex.ac.uk:epmap ESTABLISHED
>> TCP DAOHPRW2:2215 sernt25.essex.ac.uk:epmap ESTABLISHED
>> TCP DAOHPRW2:2230 dalinux6a.essex.ac.uk:netbios-ssn
>> ESTABLISHED
>> TCP DAOHPRW2:2250 sernt2.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:2253 bodger.essex.ac.uk:microsoft-ds
> TIME_WAIT
>> TCP DAOHPRW2:http DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:http daohpr1.essex.ac.uk:1528 TIME_WAIT
>> TCP DAOHPRW2:http daohpr2.essex.ac.uk:1936 TIME_WAIT
>> TCP DAOHPRW2:netbios-ssn DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:2232 sernt23.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:2237 sernt9.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:2245 serlx08.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:2249 sernt2.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:2261 sernt23.essex.ac.uk:netbios-ssn
> TIME_WAIT
>> TCP DAOHPRW2:3389 daohpr1.essex.ac.uk:1533 ESTABLISHED
>>
>>
>> Half another later, long after the connection_pool_timeout,
>> connect_timeout and prepost_timeout, the netstat -a command still
>> shows
>> this:
>>
>> Proto Local Address Foreign Address State
>> TCP DAOHPRW2:epmap DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:microsoft-ds DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:1078 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:3389 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:8009 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:8080 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:10000 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:8005 DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:netbios-ssn DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:2076 daohprp2.essex.ac.uk:3306 ESTABLISHED
>> TCP DAOHPRW2:2754 sernt29.essex.ac.uk:microsoft-ds
>> TIME_WAIT
>> TCP DAOHPRW2:2782 sernt29.essex.ac.uk:epmap ESTABLISHED
>> TCP DAOHPRW2:2783 sernt29.essex.ac.uk:1025 ESTABLISHED
>> TCP DAOHPRW2:http DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:netbios-ssn DAOHPRW2.essex.ac.uk:0 LISTENING
>> TCP DAOHPRW2:microsoft-ds daohpr1.essex.ac.uk:1541 ESTABLISHED
>> TCP DAOHPRW2:3389 daohpr1.essex.ac.uk:1533 ESTABLISHED
>>
>>
>> Yet if I then try again to access the web service running on Tomcat,
>> mod_jk fails to re-establish a connection, according to the
> mod_jk.log:
>>
>> [Fri Jan 19 12:50:51 2007] [0404:2404] [error] jk_ajp_common.c (948):
>> (ajp13) can't receive the response message from tomcat, network
>> problems or tomcat is down (127.0.0.1:8009), err=-53 [Fri Jan 19
>> 12:50:51 2007] [0404:2404] [error] jk_ajp_common.c (1566):
>> (ajp13) Tomcat is down or refused connection. No response has been
>> sent to the client (yet) [Fri Jan 19 12:50:51 2007] [0404:2404] [info]
>
>> jk_ajp_common.c (1877):
>> (ajp13) receiving from tomcat failed, recoverable operation attempt=0
>> [Fri Jan 19 12:50:51 2007] [0404:2404] [info] jk_ajp_common.c (1916):
>> (ajp13) sending request to tomcat failed, recoverable operation
>> attempt=1 [Fri Jan 19 12:50:52 2007] [0404:2404] [error]
> jk_ajp_common.c (948):
>> (ajp13) can't receive the response message from tomcat, network
>> problems or tomcat is down (127.0.0.1:8009), err=-53 [Fri Jan 19
>> 12:50:52 2007] [0404:2404] [error] jk_ajp_common.c (1566):
>> (ajp13) Tomcat is down or refused connection. No response has been
>> sent to the client (yet) [Fri Jan 19 12:50:52 2007] [0404:2404] [info]
>
>> jk_ajp_common.c (1877):
>> (ajp13) receiving from tomcat failed, recoverable operation attempt=1
>> [Fri Jan 19 12:50:52 2007] [0404:2404] [info] jk_ajp_common.c (1916):
>> (ajp13) sending request to tomcat failed, recoverable operation
>> attempt=2 [Fri Jan 19 12:50:52 2007] [0404:2404] [error]
> jk_ajp_common.c (1928):
>> (ajp13) Connecting to tomcat failed. Tomcat is probably not started or
>
>> is listening on the wrong port [Fri Jan 19 12:50:52 2007] ajp13
>> daohprw2-a 0.281333 GET /ohpr/servlet/
>> HTTP/1.1 200
>> [Fri Jan 19 12:50:52 2007] [0404:2404] [info] mod_jk.c (2142):
>> Service error=0 for worker=ajp13
>>
>> Only Apache continues to respond with a standard 503 error according
>> to its access.log:
>>
>> daohpr1.essex.ac.uk - - [19/Jan/2007:12:50:51 +0000] "GET
>> /ohpr/servlet/ HTTP/1.1" 503 1101 "-" "Mozilla/5.0 (Windows; U;
>> Windows NT 5.1; en-US;
>> rv:1.8.0.9) Gecko/20061206 Firefox/1.5.0.9"
>>
>> In short: There were only 2 established connections, Tomcat was
>> running all the time, and, as expected, only saw 2 active
>> HTTPSessions, yet the rapid hammering on weblinks within the website
>> somehow blocked the connections between Apache and Tomcat. And now
>> Tomcat keeps just listening on port 8009, but mod_jk is unable to
>> establish any TCP connections between Apache and Tomcat. Only a
>> complete server machine re-boot gets things back to normal.
>>
>> Any ideas what might have gone wrong? I am still using this
>> workers.properties:
>>
>> # Define 1 real worker using ajp13
>> worker.list=ajp13
>> # Set properties for worker1 (ajp13)
>> worker.ajp13.type=ajp13
>> worker.ajp13.host=localhost
>> worker.ajp13.port=8009
>> worker.ajp13.connection_pool_timeout=600
>> worker.ajp13.connection_pool_minsize=10
>> worker.ajp13.connect_timeout=15000
>> worker.ajp13.prepost_timeout=10000
>>
>>
>> Regards
>>
>> Juergen Neuhoff
>>
>>
>
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