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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 36495] New: - mod_proxy_ajp: ajp_check_msg_header() got bad signature xxxx
Date Mon, 05 Sep 2005 07:07:27 GMT
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http://issues.apache.org/bugzilla/show_bug.cgi?id=36495

           Summary: mod_proxy_ajp: ajp_check_msg_header() got bad signature
                    xxxx
           Product: Apache httpd-2.0
           Version: 2.1-HEAD
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_proxy
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: xuekun.hu@gmail.com


I tried to use the new connector "mod_proxy_ajp" to connect with Apache2.1.x 
and TOMCAT 5.5.9. With little simultaneous connections, all work fine. However 
when have lots of simultaneous connections, there are lots of the belows 
errors: 
...
[Mon Sep 05 14:29:35 2005] [error] ajp_check_msg_header() got bad signature 40
[Mon Sep 05 14:29:35 2005] [error] ajp_ilink_receive() received bad header
[Mon Sep 05 14:29:35 2005] [error] proxy: got bad response (2) from (null) (*)
[Mon Sep 05 14:29:35 2005] [error] ajp_read_header: ajp_ilink_receive failed
[Mon Sep 05 14:29:35 2005] [error] (120007)APR does not understand this error 
code: proxy: read response failed from (null) (*)
[Mon Sep 05 14:29:35 2005] [error] ajp_check_msg_header() got bad signature 1a8a
[Mon Sep 05 14:29:35 2005] [error] ajp_ilink_receive() received bad header
[Mon Sep 05 14:29:35 2005] [error] ajp_read_header: ajp_ilink_receive failed
[Mon Sep 05 14:29:35 2005] [error] (120007)APR does not understand this error 
code: proxy: read response failed from (null) (*)
[Mon Sep 05 14:29:35 2005] [error] ajp_check_msg_header() got bad signature 2020
[Mon Sep 05 14:29:35 2005] [error] ajp_ilink_receive() received bad header
[Mon Sep 05 14:29:35 2005] [error] ajp_read_header: ajp_ilink_receive failed
[Mon Sep 05 14:29:35 2005] [error] (120007)APR does not understand this error 
code: proxy: read response failed from (null) (*)
...

My Apache configuration:
ThreadLimit     600
<IfModule worker.c>
StartServers         4
MaxClients         24000
ServerLimit     50
MinSpareThreads      1000
MaxSpareThreads      2000
ThreadsPerChild     600
MaxRequestsPerChild  0
ListenBackLog   3000
</IfModule>
MaxRequestsPerChild  0

ProxyPass /jspdir ajp://localhost:8009/jspdir max=100

My TOMCAT configuration:
   <Connector port="8009" maxHttpHeaderSize="8192"
              maxThreads="8000" minSpareThreads="4000" maxSpareThreads="8000"
              acceptCound="50000" enableLookups="false"
redirectPort="8443" protocol="AJP/1.3"
              tomcatAuthentication = "false" />

Thx, Xuekun

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