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From Christopher Schultz <ch...@christopherschultz.net>
Subject Re: Tomcat Xml parser issue
Date Fri, 17 Nov 2017 18:20:08 GMT
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Vicky,

On 11/16/17 1:30 PM, Vicky B wrote:
> Thanks but the same war works fine is WebSphere and tomcat on
> Windows it is just tomcat provided by  Redhat which work different
> i.e it throws the exception

My guess is that something in your Windows environment causes the JRE
to establish the JRE-provided XML parser as the system parser *before*
your code takes over and bootstraps something else.

This is not a Tomcat problem. This is not a Linux problem. It's a
problem with the interaction of one of your libraries and what should
be a system-provided XML parser.

- -chris

> On Nov 16, 2017 11:39 PM, "Christopher Schultz" < 
> chris@christopherschultz.net> wrote:
> 
> Vicky,
> 
> On 11/16/17 12:24 PM, Vicky B wrote:
>>>> It is XML parser (DOM and SAX ) from oracle (doc 
>>>> <https://docs.oracle.com/cd/B10501_01/appdev.920/a96609/arj_xmlpars
erv
>
>>>> 
2.htm>)
>>>> 
>>>> 
> .
> 
> Why do you need a custom XML parser? Why not simply use the one 
> bundled with the JRE?
> 
>>>> Why is tomcat using XMLparserv2
> 
> Where is the xmlparserv2.jar file? Some badly-behaved libraries 
> install themselves as the "system" parser when they are used even
> if they aren't being loaded by the system or application (which
> doesn't mean YOUR application) ClassLoader. If that happens, you
> can get weird problems like this.
> 
>>>> tomcat we have in linux machine is from redhat . Why does
>>>> tomcat downloaded from apache tomcat site work different form
>>>> the one provided by REDHat.
> 
> Package managers often make adjustments that make sense for their 
> environments. I suspect that this problem has less to do with
> RedHat's Tomcat package and more to do with how you deploy your
> application, its libraries, etc.
> 
>>>> how does class loading work in tomcat.
> 
> Tomcat sets up a ClassLoader for itself to work in. For each
> webapp, a separate ClassLoader is created for them to work in with
> the Tomcat server ClassLoader as the parent. But the webapp's
> ClassLoader is a "child-first" ClassLoader meaning that classes and
> libraries bundled with the application are preferred when code is
> executing in the application's context.
> 
> If you had told us your Tomcat version (or anything else about
> your environment), we might have been able to help more, but you
> aren't providing much in the way of information.
> 
> Assuming Tomcat 8.0 (because why not?), here is the explanation
> for how class loading works in Tomcat. Almost as if someone was
> /trying/ to make that information available for people looking for
> it.
> 
> https://tomcat.apache.org/tomcat-8.0-doc/class-loader-howto.html
> 
> -chris
> 
>>>> On Thu, Nov 16, 2017 at 8:15 PM, Christopher Schultz < 
>>>> chris@christopherschultz.net> wrote:
>>>> 
>>>> Vicky,
>>>> 
>>>> On 11/16/17 6:53 AM, Vicky B wrote:
>>>>>>> Hi All,
>>>>>>> 
>>>>>>> I have application which is using spring , ESAPI and
>>>>>>> oracle xmlparserv2.jar , this application works fine in
>>>>>>> my local tomcat on windows  but when i deployed in
>>>>>>> linux server with linux based apache tomcat i got below
>>>>>>> error when spring container  was trying to parse
>>>>>>> application specific xmls
>>>>>>> 
>>>>>>> org.apache.catalina.core.StandardContext.listenerStart 
>>>>>>> Exception sending context initialized event to
>>>>>>> listener instance of class 
>>>>>>> org.springframework.web.context.ContextLoaderListener
>>>>>>> 
>>>>>>> org.springframework.beans.factory.BeanDefinitionStoreException:
>>>>>>>
>>>>>>>
>
>>>>>>> 
Parser configuration exception parsing XML from class path
>>>>>>> resource [spring/spring-context.xml]; nested exception
>>>>>>> is javax.xml.parsers.ParserConfigurationException:
>>>>>>> Unable to validate using XSD: Your JAXP provider 
>>>>>>> [oracle.xml.jaxp.JXDocumentBuilderFactory@526ad194]
>>>>>>> does not support XML Schema. Are you running on Java
>>>>>>> 1.4 with Apache Crimson? Upgrade to Apache Xerces (or
>>>>>>> Java 1.5) for full XSD support.
>>>>>>> 
>>>>>>> 
>>>>>>> when i removed xmlparserv2.jar from my war file the 
>>>>>>> application worked fine , what is the issue is this due
>>>>>>> to class loading issue or could be possible reason for
>>>>>>> this issue . Does tomcat provide xml parser which
>>>>>>> spring loads.
>>>> 
>>>> What is xmlparserv2.jar?
>>>> 
>>>> -chris
>>>>> 
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>>>> 
>>>> 
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> 
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