Tomcat server (from XAMPP package) cannot be started from Eclipse

Question

I am using Windows 7. I installed Eclipse and updated to include WPT. HTTP Server and Tomcat are installed with XAMPP Package. They run properly and they can be accessed via localhost.

But I found that tomcat server cannot be started. Eclipse always reports failed to start.

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:412)
Caused by: java.lang.UnsatisfiedLinkError: org.apache.tomcat.jni.Pool.create(J)J
at org.apache.tomcat.jni.Pool.create(Native Method)
at org.apache.tomcat.util.net.AprEndpoint.init(AprEndpoint.java:589)
at org.apache.coyote.http11.Http11AprProtocol.init(Http11AprProtocol.java:107)
at org.apache.catalina.connector.Connector.initialize(Connector.java:1058)
at org.apache.catalina.core.StandardService.initialize(StandardService.java:677)
at org.apache.catalina.core.StandardServer.initialize(StandardServer.java:795)
at org.apache.catalina.startup.Catalina.load(Catalina.java:535)
at org.apache.catalina.startup.Catalina.load(Catalina.java:555)
... 6 more*

Is there anything that I can check ?

Answer 1

You're using the HTTP 1.1 APR protocol (or at least, XAMPP has configured its Tomcat instance to use APR by default). This has dependencies on native libraries which should be included in the environment variable %PATH%. If those native libraries cannot be resolved, you'll get an java.lang.UnsatisfiedLinkError.

So to fix this issue, you need to add the path to the APR libraries to the %PATH% or to change the protocol attribute of the HTTP connector in server.xml to use the standard implementation HTTP/1.1 or the NIO implementation org.apache.coyote.http11.Http11NioProtocol.