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From "Vattikuti, Vamsi Krishna Venkata (STSD)" <>
Subject [users@httpd] MaxRequestsPerChild - New child process doesn't process requests
Date Thu, 21 Aug 2014 20:39:40 GMT

We are having an issue with Tomcat application accessing through proxy and details are below.
Can you please check and share your feedback.

We have an application(tomcat) accessed through proxy as below. Also, we have MaxRequestsPerChild
setting as 100

Whenever MaxRequestsPerChild reached its limit, a new process is started but the application
become unresponsive. It seems that new process doesn't service any requests
We have to restart httpd to recover that


-          Access.log doesn't show any requests for new child

-          Error_log shows that

a)      workers are initiated for new process but it didn't service any requests


c)       processing has stuck for a minute due to some reason

   [Fri Aug 08 16:09:17 2014] [debug] ssl_engine_kernel.c(2118): [client] Certificate
Verification, depth 0 [subject: /C=y/ST=y/L=y/O=y/OU=y/CN=y, issuer: /C=y/ST=y/L=y/O=y/OU=y/CN=y,
serial: xyz]

   [Fri Aug 08 16:10:12 2014] [info] [client] Connection to child 6 established
(server *:<port number from client>)

d)      SSL handshake has started but didn't complete for 4 connections related to new process.
There are no errors related to ssl

$ grep -i handshake errorlog.2014-08-08-07_06_44 | grep -c start


$ grep -i handshake errorlog.2014-08-08-07_06_44 | grep -c done



Apache version:

Proxy setting:
SSLProxyEngine On
SSLProxyCipherSuite ALL
SSLProxyMachineCertificateFile /var/ssl/proxy.pem

proxyPass /app1 https://localhost:<port number>/app1<https://localhost:%3cport%20number%3e/app1>

Worker configuration:
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
<IfModule worker.c>
StartServers         1
MaxClients           25
MinSpareThreads      12
MaxSpareThreads      25
ThreadsPerChild      25
ServerLimit          1
MaxRequestsPerChild  100
MaxMemFree  50

Thanks & Regards,

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