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My struts 2 tile application was working fine. But after adding the struts2-jquery-plugin library jar, I am getting the following error:

"SEVERE: Exception starting filter struts2 Unable to load configuration. - [unknown location]"

My libraries structure is:

  • antlr-2.7.6
  • commons-beanutils-1.7.0
  • commons-collections-3.1
  • commons-digester-1.7
  • commons-fileupload-1.2.1
  • commons-io-1.3.2
  • commons-lang-2.3
  • commons-logging-1.1
  • freemarker-2.3.13
  • hsqldb
  • jta-1.1
  • log4j-1.2.15
  • ognl-2.6.11
  • slf4j-api-1.5.8
  • slf4j-log4j12-1.5.8
  • struts2-convention-plugin-2.1.6
  • struts2-core-2.1.6
  • struts2-jquery-plugin-3.5.1
  • struts2-tiles-plugin-2.1.6
  • tiles-api-2.1.2
  • tiles-compat-2.1.2
  • tiles-core-2.1.2
  • tiles-jsp-2.1.2
  • tiles-servlet-2.1.2
  • xwork-2.1.2

I am unable to find the jars/classes which are getting conflict.

And I want to know what is the best way to overcome such conflict.

Thanks!

user2075538
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1 Answers1

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The conflicts are coming from using a version of the jQuery plugin that doesn't work with the version of S2 you're using. 3.5.1 of the s2 jQuery plugin requires S2 2.3.8, as its POM shows (in struts2-jquery, the plugin's parent project).

You cannot arbitrarily mix-and-match versions of libraries; you must respect dependencies unless you are certain they're compatible. It's why we have tools like Maven.

One way to highlight possible conflicts is to use mvn dependency:tree and see where there are multiple versions of the same library.

Dave Newton
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