Set the MaxRequestParamterCount Value

Error:
weblogic.utils.http.MaxRequestParameterExceedException
at weblogic.utils.http.QueryParams.checkLimit(QueryParams.java:52)
at weblogic.utils.http.QueryParams.getCurrentAndCheck(QueryParams.java:46)
at weblogic.utils.http.QueryParams.put(QueryParams.java:79)

Description:
The default value of MaxRequestParamterCount is 10,000, crossing which would cause a MaxRequestParameterExceedException

Solution:
1.We can apply patch 13656558 for version 10.3.6, but since it is a security patch it is not freely available
Instead we can upgrade our version to 10.3.6.0.4 by applying patch 16083651.
(patch 16083651already in itself includes the patch 13656558).

2. Follow Doc ID 1505598.1

The MaxRequestParamterCount can be set in 3 places:

    On the WebAppContainerMBean, which is under the DomainMBean and has domain wide effect.
    On the WebServerMBean, which is under ServerMBean and has effect on only JVM. 
    This overrides settings on the WebAppContainerMBean.
    On the VirtualHostMBean. Virtual hosts, like servers, are under DomainMBean. 
    This overrides settings on the WebAppContainerMBean.

Use WLST to set it
 
WebAppContainerMBean:

$ connect('<user>','<pwd>','<admin_url>')
$ edit()
$ startEdit()
$ cmo.getWebAppContainer().setMaxRequestParamterCount(1000)
$ save()
$ activate()
$ exit()

WebServerMBean:

$ connect('<user>','<pwd>','<admin_url>')
$ edit()
$ startEdit()
$ cd('Servers/<server-name>')
$ cmo.getWebServer().setMaxRequestParamterCount(1000)
$ save()
$ activate()
$ exit()

For VirtualHostMBean:
$ connect('<user>','<pwd>','<admin_url>')
$ edit()
$ startEdit()
$ cd('VirtualHosts/<virtualhost>')
$ cmo.setMaxRequestParamterCount(1000)
$ save()
$ activate()
$ exit()



I tried making the change in my 12.1.1.0.3 and it works fine.

Adminserver.log
####<Aug 21, 2013 10:45:03 AM IST> <Info> <Management> <****> <> <[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'> <> <> <> <1377062103640> <BEA-000000> <Version: WebLogic Server 12.1.1.0.3 PSU Patch for BUG14736141 Mon Dec 17 02:10:51 MST 2012


cmd

D:\work\wls\wls12.1.1\user_projects\domains\base_domain\bin>setDomainEnv.cmd
D:\work\wls\wls12.1.1\user_projects\domains\base_domain>cd D:\work\wls\wls12.1.1
\wlserver_12.1\common\bin
D:\work\wls\wls12.1.1\wlserver_12.1\common\bin>
D:\work\wls\wls12.1.1\wlserver_12.1\common\bin>wlst.cmd
wls:/base_domain/config> connect('weblogic','welcome1','t3://localhost:8001')
wls:/base_domain/config> easeSyntax()
wls:/base_domain/serverConfig/Servers/m1/WebServer/m1>
wls:/base_domain/serverConfig/Servers/m1/WebServer/m1> edit
<function edit 3>
wls:/base_domain/edit> cd Servers
wls:/base_domain/edit/Servers> cd m1
wls:/base_domain/edit/Servers/m1> cd WebServer
wls:/base_domain/edit/Servers/m1/WebServer> cd m1
wls:/base_domain/edit/Servers/m1/WebServer/m1> startEdit ()  
Starting an edit session ...
Started edit session, please be sure to save and activate your
changes once you are done.
wls:/base_domain/edit/Servers/m1/WebServer/m1 !> cmo.getMaxRequestParamterCount()
10000
wls:/base_domain/edit/Servers/m1/WebServer/m1 !> cmo.setMaxRequestParamterCount(-1)
wls:/base_domain/edit/Servers/m1/WebServer/m1 !>ls
wls:/base_domain/edit/Servers/m1/WebServer/m1 !> ls
dr--   Targets
dr--   WebServerLog
-rw-   AcceptContextPathInGetRealPath               false
-rw-   AuthCookieEnabled                            true
-rw-   Charsets                                     null
-rw-   ChunkedTransferDisabled                      false
-rw-   ClientIpHeader                               null
-rw-   DefaultWebAppContextRoot                     null
-rw-   DeploymentOrder                              1000
-rw-   FrontendHTTPPort                             0
-rw-   FrontendHTTPSPort                            0
-rw-   FrontendHost                                 null
-rw-   HttpsKeepAliveSecs                           60
-rw-   KeepAliveEnabled                             true
-rw-   KeepAliveSecs                                30
-rw-   MaxPostSize                                  -1
-rw-   MaxPostTimeSecs                              -1
-rw-   MaxRequestParamterCount                      -1

wls:/base_domain/edit/Servers/m1/WebServer/m1 !> save
<function save 4>
wls:/base_domain/edit/Servers/m1/WebServer/m1 !> save ()
Saving all your changes ...
Saved all your changes successfully.  

Reference:

Doc ID 1505598.1