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• ecj-<VERSION>.jar
• tomcat-embed-core.jar
• tomcat-embed-jasper.jar
• tomcat-embed-logging-julilog4j.jar (required to enable log4j for internal tomcat logging)

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From the "Core Tomcat" distribution, copy to the framework/catalina/lib folder the following jars (and remove the old versions):

• tomcat-catalina-ha.jar
• tomcat-catalina-tribes.jar

for clustering support.

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they are the standard API specifications; please add the suffix for the specification version (can be found in the Tomcat documentation or in the Manifest file in them).
The current specification versions in OFBiz (and Tomcat 7.0.*) are:

• annotations-api-3.0.jar
• el-api-2.2.jar
• jsp-api-2.2.jar
• servlet-api-3.0.jar