From tapestry-user  Wed Jan 16 21:20:37 2008
From: Kaspar Fischer <fischerk () inf ! ethz ! ch>
Date: Wed, 16 Jan 2008 21:20:37 +0000
To: tapestry-user
Subject: Re: [Slightly OT] GZIP compression filter and java.lang.IllegalStateException: Cannot create a sessi
Message-Id: <C9670FD3-6A9B-4154-8971-4029CE7AB7D1 () inf ! ethz ! ch>
X-MARC-Message: https://marc.info/?l=tapestry-user&m=120051847829347

For the sake of completeness: I've solved this by enabling Tomcat  
5.5's GZIP
compression in server.xml:

     <Connector acceptCount="100" connectionTimeout="20000"  
disableUploadTimeout="true" enableLookups="false"  
maxHttpHeaderSize="8192" maxSpareThreads="75" maxThreads="150"  
minSpareThreads="25" port="8080" redirectPort="8443"

			   compression="on"
			   compressionMinSize="2048"
			   noCompressionUserAgents="gozilla, traviata"
			   compressableMimeType="text/html,text/xml" />

On 12.01.2008, at 03:44, Kaspar Fischer wrote:

> Hi,
>
> I've tried to install a compression filter and followed
>
>   http://www.nabble.com/-slight-OT--GZip-compression-filter- 
> td6901991.html
>
> for this.
>
> When I load my page, I get an exception (see below) about a OGNL  
> expression
> that could not be parsed and "Cannot create a session after the  
> response has
> been committed". (It works without the GZIP compression.)
>
> My configuration is:
>
> <web-app>
>   <!-- lots of other stuff -->
>   <filter>
>   <filter-name>CompressingFilter</filter-name>
>   <filter- 
> class>com.planetj.servlet.filter.compression.CompressingFilter</ 
> filter-class>
>   <!-- Adobe's plugin for IE chokes on gzip'ed PDFs -->
>   <init-param>
>    <param-name>excludeContentTypes</param-name>
>    <param-value>application/pdf</param-value>
>   </init-param>
>   <init-param>
>    <param-name>excludePathPatterns</param-name>
>    <param-value>.*\.pdf</param-value>
>   </init-param>
>  </filter>
>
>  <filter-mapping>
>   <filter-name>CompressingFilter</filter-name>
>   <url-pattern>/*</url-pattern>
>   <dispatcher>REQUEST</dispatcher>
>  </filter-mapping>
> </web-app>
>
> Does anybody know how I can fix this?
>
> Thanks in advance!
> Kaspar
>
> P.S. I post (see link above) also mentions code; I have not changed/ 
> added
> any code. Should I have done?
>
> --
>
> javax.servlet.ServletException: Unable to parse OGNL expression  
> 'loginSession.isLoggedIn()': loginSession
>
> org.apache.hivemind.ApplicationRuntimeException: Unable to parse  
> OGNL expression 'loginSession.isLoggedIn()': loginSession
>    location: context:/WEB-INF/Border.html, line 121
>
> org.apache.tapestry.BindingException: Unable to parse OGNL  
> expression 'loginSession.isLoggedIn()': loginSession
>    binding: ExpressionBinding[null loginSession.isLoggedIn()]
>    location: context:/WEB-INF/Border.html, line 121
>
> org.apache.hivemind.ApplicationRuntimeException: Unable to parse  
> OGNL expression 'loginSession.isLoggedIn()': loginSession
>
> ognl.OgnlException: loginSession
>
> java.lang.IllegalStateException: Cannot create a session after the  
> response has been committed
> org.apache.catalina.connector.Request.doGetSession(Request.java:2221)
> org.apache.catalina.connector.Request.getSession(Request.java:2031)
> org.apache.catalina.connector.RequestFacade.getSession 
> (RequestFacade.java:832)
> org.apache.tapestry.web.ServletWebRequest.getSession 
> (ServletWebRequest.java:81)
> ...
>
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