mysql-tomcat 启动报错 startup failed due to previous errors

3349 [localhost-startstop-1] info org.hibernate.cfg.settingsfactory - named query checking : enabled
3349 [localhost-startstop-1] info org.hibernate.cfg.settingsfactory - check nullability in core (should be disabled when bean validation is on): enabled
4049 [localhost-startstop-1] info org.quartz.core.quartzscheduler - scheduler scheduler_$_non_clustered shutting down.
4049 [localhost-startstop-1] info org.quartz.core.quartzscheduler - scheduler scheduler_$_non_clustered paused.
4053 [localhost-startstop-1] info org.quartz.core.quartzscheduler - scheduler scheduler_$_non_clustered shutdown complete.
mar 02, 2016 4:01:45 pm org.apache.catalina.core.standardcontext startinternal
severe: one or more listeners failed to start. full details will be found in the appropriate container log file
mar 02, 2016 4:01:45 pm org.apache.catalina.core.standardcontext startinternal
severe: context [/heximobile] startup failed due to previous errors
mar 02, 2016 4:01:45 pm org.apache.catalina.loader.webappclassloaderbase clearreferencesjdbc
severe: the web application [/heximobile] registered the jdbc driver [com.mysql.jdbc.driver] but failed to unregister it when the web application was stopped. to prevent a memory leak, the jdbc driver has been forcibly unregistered.
mar 02, 2016 4:01:45 pm org.apache.catalina.loader.webappclassloaderbase clearreferencesthreads
severe: the web application [/heximobile] appears to have started a thread named [mysql statement cancellation timer] but has failed to stop it. this is very likely to create a memory leak.
mar 02, 2016 4:01:45 pm org.apache.catalina.loader.webappclassloaderbase clearreferencesthreads
severe: the web application [/heximobile] appears to have started a thread named [timer-1] but has failed to stop it. this is very likely to create a memory leak.
mar 02, 2016 4:01:45 pm org.apache.catalina.startup.hostconfig deploydirectory
info: deployment of web application directory /usr/apache-tomcat-7.0.67/webapps/heximobile has finished in 50,024 ms
mar 02, 2016 4:01:45 pm org.apache.coyote.abstractprotocol start
info: starting protocolhandler ["http-nio-1303"]
mar 02, 2016 4:01:45 pm org.apache.coyote.abstractprotocol start
info: starting protocolhandler ["ajp-bio-8009"]
mar 02, 2016 4:01:45 pm org.apache.catalina.startup.catalina start
info: server startup in 50731 ms