I have install tomcat and mod_jk as http://jakarta.apache.org/tomcat/jakarta-tomcat/src/doc/mod_jk-howto.html tell, but the jsp and servlet example are don't work. If I select jsp file at example, it display raw jsp code but don't pass to tomcat to process. If I select servlet examples, it dispaly file not find error. I have include the files under apache config file as state in the document: LoadModule jk_module libexec/mod_jk.so AddModule mod_jk.c JkWorkersFile /var/tomcat/conf/workers.properties JkLogFile /var/tomcat/logs/mod_jk.log JkLogLevel warn Include /var/tomcat/conf/mod_jk.conf-auto And from the mod_jk log, I find the following entry: [jk_uri_worker_map.c (334)]: jk_uri_worker_map_t::uri_worker_map_close, NULL parameter [jk_uri_worker_map.c (184)]: In jk_uri_worker_map_t::uri_worker_map_free, NULL parameters How can I solve?