Using a variety of tutorials I found online and the documentation for
o.a.c.startup.Tomcat, I created the following main method to start up an
embedded Tomcat. I'm using 7.0.37 Tomcat JARs.
public static void main(String... arguments) throws Exception
{
Tomcat tomcat = new Tomcat();
tomcat.setBaseDir(".basedir");
tomcat.setPort(8973);
tomcat.enableNaming();
tomcat.init();
tomcat.start();
System.out.println("X: " +
tomcat.getConnector().getService().getContainer());
tomcat.getServer().await();
}
The System.out.println is for debugging purposes, because I'm getting a
NullPointerException. Obviously I'm doing something wrong, because about an
hour of Googling turned up precisely zero results of anyone who's getting a
NullPointerException in MapperListener#findDefaultHost. For some reason, it
looks like a Container is never created. What gives? Here's the full output of
running the JAR file:
Mar 14, 2013 2:39:04 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8973"]
Mar 14, 2013 2:39:04 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Tomcat
Mar 14, 2013 2:39:04 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8973"]
Mar 14, 2013 2:39:04 PM org.apache.catalina.core.StandardService startInternal
SEVERE: Failed to start connector [Connector[HTTP/1.1-8973]]
org.apache.catalina.LifecycleException: Failed to start component
[Connector[HTTP/1.1-8973]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at
org.apache.catalina.core.StandardService.startInternal(StandardService.java:459)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at
org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:732)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:335)
at com.ul.Bootstrap.main(Bootstrap.java:15)
Caused by: org.apache.catalina.LifecycleException: Failed to start component
[org.apache.catalina.connector.MapperListener@768debd]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at
org.apache.catalina.connector.Connector.startInternal(Connector.java:1022)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 6 more
Caused by: java.lang.NullPointerException
at
org.apache.catalina.connector.MapperListener.findDefaultHost(MapperListener.java:252)
at
org.apache.catalina.connector.MapperListener.startInternal(MapperListener.java:104)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 8 more
X: null
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