title: `catalina.sh start` (to start tomcat) just hangs
body: <p>I have <code>tomcat6.0.37</code> and I am trying to start it by running <code>catalina.sh</code> and it just hangs there for more than 30 mins. I couldn't got <code>localhost:8080/myapp</code> either.</p>
  
  <p>Does anyone know what happened?</p>
  
  <pre><code>$ ./catalina.sh run
  Using CATALINA_BASE:   /home/lib/apache-tomcat-6.0.37
  Using CATALINA_HOME:   /home/lib/apache-tomcat-6.0.37
  Using CATALINA_TMPDIR: /home/lib/apache-tomcat-6.0.37/temp
  Using JRE_HOME:        /usr/lib/jvm/java-7-openjdk-amd64
  Using CLASSPATH:       /home/lib/apache-tomcat-6.0.37/bin/bootstrap.jar
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.AprLifecycleListener init
  INFO: An older version 1.1.24 of the APR based Apache Tomcat Native library is installed, while Tomcat recommends version greater than 1.1.27
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.AprLifecycleListener init
  INFO: Loaded APR based Apache Tomcat Native library 1.1.24 using APR version 1.4.6.
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.AprLifecycleListener init
  INFO: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.AprLifecycleListener initializeSSL
  INFO: OpenSSL successfully initialized with version OpenSSL 1.0.1c 10 May 2012
  Jul 25, 2013 10:49:47 AM org.apache.coyote.http11.Http11AprProtocol init
  INFO: Initializing Coyote HTTP/1.1 on http-8080
  Jul 25, 2013 10:49:47 AM org.apache.coyote.ajp.AjpAprProtocol init
  INFO: Initializing Coyote AJP/1.3 on ajp-8009
  Jul 25, 2013 10:49:47 AM org.apache.catalina.startup.Catalina load
  INFO: Initialization processed in 331 ms
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.StandardService start
  INFO: Starting service Catalina
  Jul 25, 2013 10:49:47 AM org.apache.catalina.core.StandardEngine start
  INFO: Starting Servlet Engine: Apache Tomcat/6.0.37
  Jul 25, 2013 10:49:47 AM org.apache.catalina.startup.HostConfig deployDescriptor
  INFO: Deploying configuration descriptor manager.xml
  Jul 25, 2013 10:49:47 AM org.apache.catalina.startup.HostConfig deployDescriptor
  INFO: Deploying configuration descriptor host-manager.xml
  Jul 25, 2013 10:49:47 AM org.apache.catalina.startup.HostConfig deployDirectory
  INFO: Deploying web application directory ROOT
  Jul 25, 2013 10:49:47 AM org.apache.catalina.startup.HostConfig deployDirectory
  INFO: Deploying web application directory examples
  Jul 25, 2013 10:49:48 AM org.apache.catalina.startup.HostConfig deployDirectory
  INFO: Deploying web application directory docs
  Jul 25, 2013 10:49:48 AM org.apache.coyote.http11.Http11AprProtocol start
  INFO: Starting Coyote HTTP/1.1 on http-8080
  Jul 25, 2013 10:49:48 AM org.apache.coyote.ajp.AjpAprProtocol start
  INFO: Starting Coyote AJP/1.3 on ajp-8009
  Jul 25, 2013 10:49:48 AM org.apache.catalina.startup.Catalina start
  INFO: Server startup in 447 ms
  </code></pre>