Configuring WebLogic Apache plug-in

I think the answer to this question is no but I'm going to ask anyway...
Is it possible to configure Apache to proxy requests to managed weblogic servers
on one physical machine only? we have a cluster containing 4 managed weblogics
spanning 2 physical machines and would prefer to have one machine be like our
primary server and the other machine as our secondary server.
Replication groups do not do the trick as it is a feature of WLS that tells it
how to handle the backup of session state information to another server in the
cluster (aside from the default algorithm WLS uses)

The solution is for BEA to provide the plug-in. Probably a few minutes of a work for BEA developer. Weblogic 9.0 has it.
Edited by muralive at 09/17/2007 10:08 PM

Similar Messages

Error loading weblogic apache plug-in

HPUX11i
Apache 2.0.55
WebLogic 8.13
I am following the instructions on how to configure the Weblogic Apache plug-in:
http://e-docs.bea.com/wls/docs81/plugins/apache.html#119517
When I attempt to verify the syntax of the http.conf or attempt to start apache, I get the following error:
/usr/lib/dld.sl: Can't shl_load() a library containing Thread Local Storage:
/usr/lib/libcl.2
/usr/lib/dld.sl: Exec format error
Syntax error on line 247 of /usr/local/apache2/conf/httpd.conf:
Cannot load /usr/local/apache2/modules/mod_wl_20.so into server: Exec format error
Any ideas on how to fix this?
Thanks.

          We will be making a port of the plug-in in the future. You should contact
          your account manager who can supply the full details.
          Thanks,
          Michael Girdley
          WLS Product Manager
          Ken <kenw{noSpam]@lostwax.com> wrote in message
          news:8cej50$dsu$[email protected]..
          > I've just read about the WebLogic Apache plug-in that's new in 5.1 :-)
          >
          > Am I right to assume that this plug-in only works for Apache running on
          > Solaris? :-(
          >
          > I'm running Apache (Stronghold actually) on Linux and I need to use this
          to
          > proxy JSP request to my Weblogic Servers running on Solaris - any
          thoughts?
          >
          > Ken
          >
          >

WebLogic Apache Plug-in

I've just read about the WebLogic Apache plug-in that's new in 5.1 :-)
          Am I right to assume that this plug-in only works for Apache running on
          Solaris? :-(
          I'm running Apache (Stronghold actually) on Linux and I need to use this to
          proxy JSP request to my Weblogic Servers running on Solaris - any thoughts?
          Ken


          We will be making a port of the plug-in in the future. You should contact
          your account manager who can supply the full details.
          Thanks,
          Michael Girdley
          WLS Product Manager
          Ken <kenw{noSpam]@lostwax.com> wrote in message
          news:8cej50$dsu$[email protected]..
          > I've just read about the WebLogic Apache plug-in that's new in 5.1 :-)
          >
          > Am I right to assume that this plug-in only works for Apache running on
          > Solaris? :-(
          >
          > I'm running Apache (Stronghold actually) on Linux and I need to use this
          to
          > proxy JSP request to my Weblogic Servers running on Solaris - any
          thoughts?
          >
          > Ken
          >
          >

Error NO_RESOURCES when using Apache Plug-in for Weblogic

Hi all,
LoadModule weblogic_module modules/mod_wl.so
   OS.....: OEL 6.3 64 bits
   Weblogic Server: 12.1.0.2 (192.168.0.123)
   Apache: Apache/2.2.15 (Unix) (192.168.0.149)
   I am trying to configure the Apache Plug-in to forward the requests to the Weblogic Server. I already did all the configuration, but when i try to access a page, i get the following error in Apache's error.log:
[Wed Dec 03 18:25:42 2014] [error] [client 192.168.0.149] <649114176419322> weblogic: *******Exception type [NO_RESOURCES] (apr_socket_connect call failed with error=13, host=192.168.0.123, port=7006 ) raised at line 1682 of URL.cpp
[Wed Dec 03 18:25:42 2014] [error] [client 192.168.0.149] weblogic: Trying GET /benefits/ at backend host '192.168.0.123/7006; got exception 'NO_RESOURCES: [os error=13, line 1682 of URL.cpp]: apr_socket_connect call failed with error=13, host=192.168.0.123, port=7006 '
[Wed Dec 03 18:25:44 2014] [error] [client 192.168.0.149] <649114176419322> weblogic: request [/benefits/] did NOT process successfully..................
   My httpd.conf if configured as follows:
Listen 8080
LoadModule weblogic_module modules/mod_wl.so
<IfModule mod_weblogic.c>
   WeblogicHost 192.168.0.123
   WeblogicPort 7006
</IfModule>
<Location /benefits>
   SetHandler weblogic-handler
</Location>
When i try to access the app deployed in Weblogic with the following address: "http://192.168.0.149:8080/benefits/" , i get the error mentioned above and the following error is displayed in my browser:
   Failure of Web Server bridge:
   No backend server available for connection: timed out after 10 seconds or idempotent set to OFF or method not idempotent.
What am i doing wrong?
Thanks in advance.

Hi all,
I had some progress... i disabled the firewall (SELinux) on the Apache server. Before, i had just disabled the firewall from the Weblogic Server. Now, when i access the apache server, it redirects (sometimes, actually) the request to my Weblogic Cluster. Let's say that 50% of the time it works and the other 50% i get the error informed previously.
   I am using the apache user and the ulimit of this user is:
      [apache@vm-apache conf]$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 15915
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 1024
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited
   From the Apache server (192.168.0.149), when i execute the "culr" command, i get the following message:
      [apache@vm-apache conf]$ curl http://192.168.0.123:7006/benefits
      <html><head><title>302 Moved Temporarily</title></head>
      <body bgcolor="#FFFFFF">
      <p>This document you requested has moved temporarily.</p>
      <p>It's now at <a href="http://192.168.0.123:7006/benefits/">http://192.168.0.123:7006/benefits/</a>.</p>
      </body></html>
   The message above represents a OK situation or a problematic one?
   Below you can see the last few lines of my Error Log and Access Log:
   ### error log ###
[Thu Dec 18 20:54:16 2014] [error] [client 192.168.0.123] <340514189468553> weblogic: parseJVMID: could not resolve hostname '-1062731653'. Returning NULL from parseJVMID
[Thu Dec 18 20:54:16 2014] [error] [client 192.168.0.123] <340314189468563> weblogic: parseJVMID: could not resolve hostname '-1062731653'. Returning NULL from parseJVMID
[Thu Dec 18 20:54:17 2014] [error] [client 192.168.0.123] File does not exist: /var/www/html/favicon.ico
[Thu Dec 18 20:54:17 2014] [error] [client 192.168.0.123] File does not exist: /var/www/html/favicon.ico
[Thu Dec 18 20:54:21 2014] [error] [client 192.168.0.123] <340114189468603> weblogic: parseJVMID: could not resolve hostname '-1062731653'. Returning NULL from parseJVMID, referer: http://192.168.0.149:8080/benefits/
[Thu Dec 18 20:54:44 2014] [error] [client 192.168.0.149] <339814189468792> weblogic: parseJVMID: could not resolve hostname '-1062731653'. Returning NULL from parseJVMID
[Thu Dec 18 20:54:44 2014] [error] [client 192.168.0.149] <339814189468792> weblogic: initJVMID: parseClusterServerList failure
[Thu Dec 18 20:54:45 2014] [error] [client 192.168.0.123] <339914189468844> weblogic: parseJVMID: could not resolve hostname '-1062731653'. Returning NULL from parseJVMID, referer: http://192.168.0.149:8080/benefits/servlet
[Thu Dec 18 20:54:45 2014] [error] [client 192.168.0.123] <339914189468844> weblogic: initJVMID: parseClusterServerList failure, referer: http://192.168.0.149:8080/benefits/servlet
[Thu Dec 18 20:54:56 2014] [error] [client 192.168.0.149] <339814189468792> weblogic: request [/benefits/welcome.html] did NOT process successfully..................
[Thu Dec 18 20:54:57 2014] [error] [client 192.168.0.123] <339914189468844> weblogic: request [/benefits/welcome.html] did NOT process successfully.................., referer:http://192.168.0.149:8080/benefits/servlet
   ### access log ###
192.168.0.123 - - [18/Dec/2014:20:54:15 -0300] "GET /benefits HTTP/1.1" 302 267 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.123 - - [18/Dec/2014:20:54:16 -0300] "GET /benefits/ HTTP/1.1" 200 5832 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.123 - - [18/Dec/2014:20:54:17 -0300] "GET /favicon.ico HTTP/1.1" 404 290 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.123 - - [18/Dec/2014:20:54:17 -0300] "GET /favicon.ico HTTP/1.1" 404 290 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.123 - - [18/Dec/2014:20:54:20 -0300] "POST /benefits/servlet HTTP/1.1" 200 492 "http://192.168.0.149:8080/benefits/" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.149 - - [18/Dec/2014:20:54:39 -0300] "GET /benefits/welcome.html HTTP/1.1" 503 250 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
192.168.0.123 - - [18/Dec/2014:20:54:44 -0300] "GET /benefits/welcome.html HTTP/1.1" 503 250 "http://192.168.0.149:8080/benefits/servlet" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0.5) Gecko/20120605 Firefox/10.0.5"
Is there any additional or recommended configuration for this solution to work properly?
Thanks again for the attention and pacience.

HTTP-Tunneling through Apache Plug-in

Hello,
has anybody experience with HTTP-Tunneling of requests to a WLS
4.5.1SP13 through an Apache-Webserver?
I'm not able to configure the apache plug-in from weblogic to act as a
reverse proxy for requests coming from a
Java Client Application.
Any Hints available?
Remo

"Jong Lee" <[email protected]> wrote in message
news:3a4a9efa$[email protected]..
>
Remo Schnidrig <[email protected]> wrote:
Hello Jong,
HTTP tunneling will append ".tun" to your request.
For apache, you can use "MatchExpression" to proxy the mime type.
i.e: add the following line to your httpd.conf
MatchExpression *.tunThat is functioning. Thank you very much.
Another question:
What about HTTPS-Tunneling through an Apache-Server?
How can I get everything through?
Thank you
Remo
We don't support https from the bridge to the server yet.
JongWhat about using HTTPS-Tunneling between our Java client and the WLS
Stronghold plug-in and HTTP-Tunneling between the plug-in and the WLS?
If this is possible, how do I have to setup the stronghold?
Remo

Configure/installing apache web server (1.3.26) plug in for weblogic server 6.1

hi,
can any body know the exact steps to configure the apache web server which can proxy requests to weblogic server 6.1?
thanks in advance.

hi,
can any body know the exact steps to configure the apache web server which can proxy requests to weblogic server 6.1?
thanks in advance.

Apache plug-in prob : when trying to access '/weblogic/' URL , "404 : file not found" error is shown

On : Apache 2.0 , Weblogic 7.0, Win 2000
I installed the Apache plug-in for as described in WL docs, but when I try to
access a URL /weblogic/ ( supposed to be configured automatically ) on apache,
I get '404 : file not found' error.
As per the docs, I did following config in Apache:
1. Copied the 'mod_wl_20.so' file found in WLHOME\server\bin directory to the
APACHE_HOME\modules directory
2. Added to httpd.conf :
LoadModule weblogic_module modules/mod_wl_20.so
3. Apache httpd.conf syntax correct : checked by running ' APACHE_HOME\bin\Apache
-t '
4. Restarted WL & Apache.
Now, the weblogic documentation says,
"Test the Apache plug-in by opening a browser and setting the URL to the Apache
Server + "/weblogic/", which should bring up the default WebLogic Server HTML
page, welcome file, or default servlet, as defined for the default Web Application
on WebLogic Server. For example:
http://myApacheserver.com/weblogic/".
For my server, 'http://localhost/weblogic/' - I get a "404 : file not found" error.
What other configuration is needed ? Do I have to specify '/weblogic/' name anywhere
else in Apache configuration file ?
Any pointers will be appreciated.
Thanks,
S

Forgot to mention , I've also added following configuration in httpd.conf :
LoadModule weblogic_module modules\mod_wl_20.so
<IfModule mod_weblogic.c>
WebLogicHost localhost
WebLogicPort 7501
</IfModule>
<Location /weblogic>
SetHandler weblogic-handler
PathTrim /weblogic
</Location>
"S" <[email protected]> wrote:
>
On : Apache 2.0 , Weblogic 7.0, Win 2000
I installed the Apache plug-in for as described in WL docs, but when
I try to
access a URL /weblogic/ ( supposed to be configured automatically ) on
apache,
I get '404 : file not found' error.
As per the docs, I did following config in Apache:
1. Copied the 'mod_wl_20.so' file found in WLHOME\server\bin directory
to the
APACHE_HOME\modules directory
2. Added to httpd.conf :
LoadModule weblogic_module modules/mod_wl_20.so
3. Apache httpd.conf syntax correct : checked by running ' APACHE_HOME\bin\Apache
-t '
4. Restarted WL & Apache.
Now, the weblogic documentation says,
"Test the Apache plug-in by opening a browser and setting the URL to
the Apache
Server + "/weblogic/", which should bring up the default WebLogic Server
HTML
page, welcome file, or default servlet, as defined for the default Web
Application
on WebLogic Server. For example:
http://myApacheserver.com/weblogic/".
For my server, 'http://localhost/weblogic/' - I get a "404 : file not
found" error.
What other configuration is needed ? Do I have to specify '/weblogic/'
name anywhere
else in Apache configuration file ?
Any pointers will be appreciated.
Thanks,
S

Installing and Configuring the Apache HTTP Server Plug-In

Hi,
I am using WL10.3 in Linux machine.
I have an environment where I have a single WL server in a domain that is deployed with the web-application
And I have another domain where I have two managed servers in a cluster that is deployed with the business.
Now, I want to configure a Apache HTTP server to make it work as a proxy along with the weblogic.
In my current scenario, the stand alone server proxies the req to the cluster and that is defined in a jndi.properties.
Now, what should I do if I want to use the Apache
I have the following questions:
1. Forget about my env, generally how can I install and configure Apache HTTP plug-in?
I see we already having libproxy_61.so file inside /bea/wlserver_10.3/server/plugin/linux/i686
Do i need to install the patch even then as told in http://www.oracle.com/technology/deploy/security/wls-security/2793.html?
2. While am adding the lines in httpd.conf ,
LoadModule weblogic_module modules/mod_wl_22.so
Should I put ibproxy_61.so instead of mod_wl_22.so in this line?
3. Just by configuring the proxy, the session replication and load balancing will be ensured?
4.And for my configuration as stated at the beginning few lines, what can be the best architecture?
Your help is really appreciated.

Hi,
Below blog would give you a clear understanding of the Integrating Apache with Weblogic. All your questions are been answered in the below blog.
http://www.prasannatech.net/2008/07/integrating-apache-tomcat-weblogic.html
You can for sure apply the patch provided in CVE-2008-3257).
Keep posted with your findings and let us know if you need any further clarification.
Regards,
Hussain

Weblogic 8.1 Apache Plug-In

Where can I find the plug-in for WLS 8.1/Apache 2.0/Windows 2003?

Hi Vishwas,
Thank you for the reply. I forgot to mention that Apache and WebLogic are on Solaris 9 platform.
Accesing a webapp hosted on WebLogic through Apache->plug-in->WebLogic return 500 internal server error, but other webapps hosted on the same WebLogic domain works properly. Looking at the Response Hdrs from WebLogic shows that WLS returns transfer-encoding=chunked. The other webapps which work properly has content-length set and transfer-encoding is not chunked.
So, the question is does Apache Plug-in for weblogic 8.1 SP5 read the chunked data properly?
Thanks,
Janani

Weblogic Configuration with Apache 2.2

Hi ,
I am getting the below error configured weblogic 10.3.5 with apache 2.2
<HTML>
<HEAD>
<TITLE>Weblogic Bridge Message
</TITLE>
</HEAD>
<BODY>
<H2>Failure of server APACHE bridge:</H2><P>
<hr>Your content length exceeded INT_MAX<hr> </BODY>
</HTML>
Thanks,

http://middlewaremagic.com/weblogic/?p=7795 (see the load balancing section)

Apache Plug-in wont re-direct.

I'm trying to use the apache plug-in to redirect traffic to my non-clusterd weblogic server but I can not get it to work. I'm trying to route everything to Weblogic. It loads the weblogic plugin but I never get re-routed. Any help is appreciated.
Thanks,
Tom.
The pertinent information below:
OS: Solaris 10
Apache: 2.0.63
Weblogic 9.2 MP3
weblogic module copied to:
/usr/apache2/libexec/mod_wl_20.so
httpd.conf entries:
# load the weblogic module
LoadModule weblogic_module libexec/mod_wl_20.so
#weblogic settings
<IfModule mod_weblogic.c>
WebLogicHost myserver.lc.ca.gov
WebLogicPort 9001
MatchExpression /*
Debug ON
WLLogFile /tmp/global_proxy.log
WLTempDir /tmp
DebugConfigInfo ON
</IfModule>
Error.log output:
[Tue Nov 18 11:05:19 2008] [info] mod_unique_id: using ip addr 165.107.72.112
[Tue Nov 18 11:05:20 2008] [info] mod_unique_id: using ip addr 165.107.72.112
[Tue Nov 18 11:05:21 2008] [notice] BEA plugin build date/time: Dec 5 2007 15:1
2:41. Change Number: 1014998
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_mod: mpm doesn't support th
reads.
[Tue Nov 18 11:05:21 2008] [notice] Digest: generating secret for digest authent
ication ...
[Tue Nov 18 11:05:21 2008] [notice] Digest: done
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_child: isThreaded = -1
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: Testing Debug=ON LogFile=/var/ap
ache2/logs/global_proxy.log TempDir=/tmp
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: created global log context in ch
ild
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_child: isThreaded = -1
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: Testing Debug=ON LogFile=/var/ap
ache2/logs/global_proxy.log TempDir=/tmp
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: created global log context in ch
ild
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_child: isThreaded = -1
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: Testing Debug=ON LogFile=/var/ap
ache2/logs/global_proxy.log TempDir=/tmp
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: created global log context in ch
ild
[Tue Nov 18 11:05:21 2008] [notice] Apache/2.0.63 (Unix) DAV/2 configured -- res
uming normal operations
[Tue Nov 18 11:05:21 2008] [info] Server built: Feb 10 2008 04:45:11
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_child: isThreaded = -1
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: Testing Debug=ON LogFile=/var/ap
ache2/logs/global_proxy.log TempDir=/tmp
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: created global log context in ch
ild
[Tue Nov 18 11:05:21 2008] [info] mod_weblogic: init_child: isThreaded = -1

OK, I chmod 777 to the mod_wl_20.so.
I also changed the httpd.config to:
<IfModule mod_weblogic.c>
WebLogicHost lwpvcma1.lc.ca.gov
WebLogicPort 9001
WLLocalIP "my local ip - removed for security"
Debug ON
WLLogFile /var/apache2/logs/global_proxy.log
WLTempDir /tmp
DebugConfigInfo ON
</IfModule>
<Location /ShoppingCart>
SetHandler weblogic-handler
PathTrim /ShoppingCart
</Location>
But I still get the same result. The apache server and weblogic server are running on the same machine - not sure if that makes a difference.
Here is what apache Server-info displays:
Module Name: mod_weblogic.c
Content handlers: yes
Configuration Phase Participation: Create Directory Config, Merge Directory Configs, Create Server Config, Merge Server Configs
Request Phase Participation: Fixups
Module Directives:
CookieName - Defines CookieName
WLCookieName - Defines WLCookieName
WebLogicCluster - Defines a list of WebLogic Clusters
WebLogicHost - Defines a WebLogic Host
WebLogicPort - Defines a WebLogic Port
PathTrim - Defines PathTrim
PathPrepend - Defines PathPrepend
HungServerRecoverSecs - This parameter is used for recovery from hung servers min:default=10:300
WLIOTimeoutSecs - Defines WLIOTimeoutSecs
WLSocketTimeoutSecs - Defines WLSocketTimeoutSecs
ConnectTimeoutSecs - Defines ConnectTimeoutSecs
ConnectRetrySecs - Defines ConnectRetrySecs
MaxPostSize - Defines MaxPostSize
StatPath - Defines StatPath
ErrorPage - Defines ErrorPage
DebugConfigInfo - Whether to log the config info or not
Idempotent - Whether to failover or not
DynamicServerList - Whether to use dynamic server list or not
MaxSkips - Defines MaxSkips
MaxSkipTime - Defines MaxSkipTime
SecureProxy - Whether SSL is required
EnforceBasicConstraints - Whether basic constraints checking is enforced
RequireSSLHostMatch - Whether SSL host match is required
SSLHostMatchOID - Which OID to use for SSL host match
TrustedCAFile - Where SSL trusted CA file is located
FileCaching - Whether to failover or not
MatchExpression - Regular expression for matching weblogic requests (e.g., "*.jsp")
Debug - Log the debugging info or not
DefaultFileName - Set the default filename
DisableCookie2Server - Igore session info in the cookie
KeepAliveEnabled - Turn on/off keep alive enable feature
KeepAliveSecs - how long we keep the socket open
WLDNSRefreshInterval - how frequent we do DNS lookup
QueryFromRequest - should use r->args as query string
WLForwardUriUnparsed - should use r->unparsed_uri instead of r->uri
WLLocalIP - specify the local IP to bind
WLTempDir - specify the location for wlproxy directory
WLLogFile - specify the log file to be used
WLProxySSL - whether to send WL-Proxy-SSL header or not
WLCrossOverProxyEnabled - whether to allow cross over proxy
WLExcludePathOrMimeType - requests to be excluded for proxying (e.g., "*.php")
Current Configuration:
WebLogicHost myhost.lc.ca.gov
WebLogicPort 9001
WLLocalIP "My Local IP Address"
Debug ON
WLLogFile /var/apache2/logs/global_proxy.log
WLTempDir /tmp
DebugConfigInfo ON
*<Location /ShoppingCart>*
PathTrim /ShoppingCart
*</Location>*

Hardware Load Balancers and Cluster WebLogic Proxy Plug-in setting

Documentation states that we need to enable the Cluster WebLogic Proxy Plug-in setting when there is a proxy plugin or HttpClusterServlet configured.
We used to have Weblogic Proxy plugin and the setting is still there, also the proxy was replaced by the hardware loadbalancer. Everything works normally and no one complained, but I would assume that WebLogic Proxy Plug-in setting should not be applicable any longer.
Is it possibly harmful to have that setting there? Does it mean that the loadbalancer emulates WebLogic Proxy Plug-in and also need this set?
Thank you

The Weblogic Proxy Plug-in Enabled flag only affects the behavior of a WL proxy module (such as if you were using Apache to proxy to WL via the mod_wl.so module). The value controls what IP address is returned when you call request.getRemoteAddr() from your application. If not enabled, you will get the IP address of the web server that proxied the request. If enabled, you will get the remote client IP address (instead of the proxy IP address) facilitated by the WL-Proxy-Client-IP header. If you are no longer using a plug-in module, the setting will have no affect. Hope this helps...

Apache plug-in won't load balance requests evenly on cluster

I can't seem to get the Apache plug-in to actually do round-robin load balancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-in will usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5 on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <> <000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did not bother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three servers and I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3 Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:53 2001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272 numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured Thu Apr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList = 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 general list: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to 192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001 INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001 parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list of length=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr# [3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628 Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robin for 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be really grateful,
thanks!
Jeff

Right - it means that the only configuration which can do perfect round-robin is a
single plugin (non-Apache, or single-process Apache) - all others essentially do random
(sort of, but it can skew test results during first N requests).
Robert Patrick <[email protected]> wrote:
Dimitri,
The way Apache works is that is spawns a bunch of child processes and the parent process
that listens on the port delegates the processing of each request to one of the child
processes. This means that the load-balancing dome by the plugin before the session ID is
assigned does not do perfect round-robining because there are multiple copies of the plugin
loaded in the multiple child processes. This situation is similar to the one you would get
by running multiple proxy servers on different machines with the NES/iPlanet and IIS
plugins.
As I pointed out in my response to Jeff, attempting to address this problem with IPC
machanisms would only solve the single machine problem and most people deploy multiple
proxy servers to avoid a single point of failure...
Hope this helps,
Robert
Dimitri Rakitine wrote:
Hrm. This is strange - I thought that all the information nesessary for a
'sticky' load-balancing (primary/secondary) is contained in the cookie/session info,
so, the particular plug-in implementation should not make any difference. For
load-balancing - statistically, given large enough sampling base, Apache plug-in
should perform just a well as NS one (unless apache is somehow misconfigured and
calls fork() for each new request).
Jeff Calog <[email protected]> wrote:
Robert,
Thanks for the sanity reply, you are definitely right. I used Netscape 3.0 on
Win2k and it did perfect round-robin load balancing to my servers.
<raving>
BEA - ARE YOU LISTENING? STOP TELLING PEOPLE YOUR APACHE PLUG-IN IS A VIABLE
LOAD BALANCING SOLUTION! It's worthless for load balancing!
</raving>
In some tests, as many as 90% of my connections/requests would be sent to a single
server. There should be something in the release notes like "By the way, the
Apache plug-in is only advertised as doing round-robin load balancing, in reality
it doesn't work worth a darn".
I'm surprised they don't used shared memory or some other technique (pipes, sockets,
signals, writing to /tmp, anything) for interprocess communication to fix that.
Jeff
Robert Patrick <[email protected]> wrote:
Yes, the problem lies in the fact that Apache uses multiple processes
instead of
multiple threads to process requests. Therefore, you end up with multiple
processes all
with the WebLogic plugin loaded into them (and they cannot see one another)...
Hopefully, Apache 2.0 when it comes out will allow the plugin to do a
better job...
Jeff Calog wrote:
I can't seem to get the Apache plug-in to actually do round-robin loadbalancing
of HTTP
requests. It does random-robin, as I like to call it, since the plug-inwill usually
hit all the
servers in the cluster but in a random fashion.
I've got three managed servers:
192.168.1.5:8001 (WL6 on Linux) 192.168.1.2:8001 (WL6 on Linux) 192.168.1.7:8001
(WL6 on Linux)
Admin server on 192.168.1.7:7000 (WL6 on W2k)
My Apache server is 1.3.9 (RedHat SSL) on 192.168.1.52.
The log file for each servers has something like this:
####<Apr 19, 2001 1:18:54 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<main> <system> <> <000102> <Joined cluster cluster1 at address 225.0.0.5on port
8001>
####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster> <neptune> <cluster1server1>
<ExecuteThread: '9' for queue: 'default'> <> <> <000127> <Adding
3773576126129840579S:192.168.1.2:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster> ####<Apr 19, 2001 1:19:31 AM MDT> <Info> <Cluster><neptune>
<cluster1server1> <ExecuteThread: '11' for queue: 'default'> <> <><000127> <Adding
-6393447100509727955S:192.168.1.5:[8001,8001,7002,7002,8001,7002,-1]:192.168.1.52
to the cluster>
So I believe I have correctly created a cluster, although I did notbother to
assign
replication groups for HTTP session replication (yet).
The Apache debug output indicates it knows about all three serversand I can see
it
doing the "random-robin" load balancing. Here is the output:
Thu Apr 19 00:20:53 2001 Initializing lastIndex=2 for a list of length=3Thu Apr
19
00:20:53 2001 Init Srvr# [1] = [192.168.1.2:8001] load=1077584792 isGood=1077590272
numSk ip=134940256 Thu Apr 19 00:20:53 2001 Init Srvr# [2] = [192.168.1.5:8001]
load=1077584792 isGood=1077590272 numSk ip=134940256 Thu Apr 19 00:20:532001
Init Srvr# [3] = [192.168.1.7:8001] load=1077584792 isGood=1077590272numSk
ip=134940256 Thu Apr 19 00:20:53 2001 INFO: SSL is not configured ThuApr 19
00:20:53 2001 Now trying whatever is on the list; ci->canUseSrvrList= 1 Thu Apr
19
00:20:53 2001 INFO: New NON-SSL URL Thu Apr 19 00:20:53 2001 generallist: trying
connect to '192.168.1.7'/8001 Thu Apr 19 00:20:53 2001 Connected to192.168.1.7:8001
Thu Apr 19 00:20:53 2001 INFO: sysSend 320 Thu Apr 19 00:20:53 2001INFO:
Reader::fill(): first=0 last=0 toRead=4096 Thu Apr 19 00:21:06 2001parsed all
headers
OK Thu Apr 19 00:21:06 2001 Initializing lastIndex=1 for a list oflength=3 Thu
Apr 19
00:21:06 2001 ###Response### : Srvr# [1] = [192.168.1.5:8001] load=1077584792
isGood=1077 546628 numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response###
: Srvr# [2] = [192.168.1.2:8001] load=1077584792 isGood=1077 546628
numSkip=1077546628 Thu Apr 19 00:21:06 2001 ###Response### : Srvr#[3] =
[192.168.1.7:8001] load=1077584792 isGood=1077 546628 numSkip=1077546628Thu Apr
19 00:21:06 2001 INFO: Reader::fill(): first=0 last=0 toRead=4096
Basically, the lastIndex=XXX appears to be random. It may do round-robinfor 4
or 5
connections but then always it resorts to randomly directing new connections.
This is what the configuration looks like using the plug-in's
/weblogic?__WebLogicBridgeConfig URL:
Weblogic Apache Bridge Configuration parameters:
WebLogic Cluster List:
1.Host: '192.168.1.2' Port: 8001 Primary
General Server List:
1.Host: '192.168.1.2' Port: 8001
2.Host: '192.168.1.5' Port: 8001
3.Host: '192.168.1.7' Port: 8001
DefaultFileName: ''
PathTrim: '/weblogic'
PathPrepend: '' ConnectTimeoutSecs:
'10' ConnectRetrySecs: '2'
HungServerRecoverSecs: '300'
MaxPostSize: '0'
StatPath: false
CookieName: JSESSIONID
Idempotent:
ON FileCaching:
ON ErrorPage: ''
DisableCookie2Server: OFF
Can someone please help to shed some light on this? I would be reallygrateful,
thanks!
Jeff
Dimitri--
Dimitri

Question about the Apache plug-in and WL server

We have a bunch of Weblogic app-servers, and I want to set up Apache servers to
front-end them. Here is what I'd like to do:
(1) Load balancer forwards requests to one of Apache servers
(2) Apache serves the static content (html,gif,css etc.)
(3) Apache servers forward the request to one of the alive Weblogic servers, with
requests for the same Weblogic session should preferably stay with the same Weblogic
server.
The catch is that we are not using Weblogic clustering - we have our own application-specific
light-weight clustering (virtually no replication of dynamic state). All I want
is that the Apache plug-ins keep forwarding the packets to the same Weblogic server
for a session (unless the server dies), and that thsi property hold even if multiple
client requests (for the same session) are rotated across multiple Apache servers.
The first is really important, the second just nice-to-have (I can setup load-balancer
with sticky sessions if needed).
The Apache plug-in documentation seems to suggest that we must use Weblogic clustering
for us to be able to specify multiple Weblogic servers in the plug-in config file,
but is that really required?
Second, does the session cookie uniquely identify the Weblogic server or does
the Apache plug-in keep the mapping between the cookie and the server? Also, does
this answer depend on whether we use Weblogic clustering or not?
The answer depends on the protocol between the Apache plug-in and the Weblogic
server. Is it documented? Available under NDA?
Your help will be really appreciated!!
thanks
-amit

is that the Apache plug-ins keep forwarding the packets to the same Weblogic
server
for a session (unless the server dies), If the session id is found in the cookie, request or postdata (in that order),
the plugin will preserve the sticky session.
and that thsi property hold even
if multiple
client requests (for the same session) are rotated across multiple Apache
servers.The rules apply to all apache instances as the single instance.
BTW, the preferred server from the session has to be in the serverList(you defined
in the httpd.conf). You are not using clusters in the backend hence the server
list will not be updated
dynamically. The plugin will not know the changes in the backend without modifying
the httpd.conf and restarted.
The first is really important, the second just nice-to-have (I can setup
load-balancer
with sticky sessions if needed).
The Apache plug-in documentation seems to suggest that we must use Weblogic
clustering
for us to be able to specify multiple Weblogic servers in the plug-in
config file,
but is that really required?
It's a recommended configuration, but not mandatory.
Second, does the session cookie uniquely identify the Weblogic server
or does
the Apache plug-in keep the mapping between the cookie and the server?The server info is in the cookie for the same client although
the plugin also maintains a list of servers.
Also, does
this answer depend on whether we use Weblogic clustering or not?
No.
The answer depends on the protocol between the Apache plug-in and the
Weblogic
server. Is it documented? Available under NDA?
Your help will be really appreciated!!
We only support http and https(60sp1 or later).

Httpproxyservlet or NSAPI or apache plug-in

          Hi all,
          I am new in bea. I want to know if NSAPI's interface is an open document or not,
          because we want to develop our self's web proxy server and cooperate with weblogic
          application server.
          or I am not sure if I can develope or modify a java web server and get httpproxyservlet
          code and integrate it with the web server?
          Thanks for any advice.
          Laura


Hello,
Chances are you are using the plugin from the base install of WebLogic.
Please get the latest one from the Service Pack. The MatchExpression
directive does not exist in the plugin from the base installation of
WebLogic.
Regards,
Eric
"SenthilKumaran Sivabalan" <[email protected]> wrote in message
news:[email protected]..
Hello,
i have installed the apache-plug-in as the per the documentation. wheniam
starting the apache webserver i have received the error
" Invalid Command 'MatchExpression',Perhaps mis-spelled or defined by a
module not included in the server configuration "
The Apache webserver is not even starting.
Environment Apache 1.3.12, SunOS 7, Weblogic 5.1
Can anyone help me. Thanks in advance
Senthilkumaran Sivabalan

Configuring WebLogic Apache plug-in

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