javax.servlet.unavailablexception on jwebmail launch

Question

I'm having some trouble on using the popular jWebmail (or Java Webmail) jar on both tomcat 5.5 and 6.

I am currently trying to make it work on Tomcat 6, and I have put the javamail jar on the lib folder of tomcat as I found somewhere advised, but still cannot make it to run.

I got this error:

jul 22, 2013 10:28:54 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Excepción de reserva de espacio para servlet WebMail
javax.servlet.UnavailableException
    at net.wastl.webmail.server.WebMailServer.initStorage(Unknown Source)
    at net.wastl.webmail.server.WebMailServer.doInit(Unknown Source)
    at net.wastl.webmail.server.WebMailServlet.init(Unknown Source)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1213)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:827)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Unknown Source)

but I do have the last javax mail jar from Oracle website. There is no net.wastl.webmail.server.WebMailServer class in there so maybe I am missing something else and I don't find any post around where it is already solved

thanks in advance

edit:

I found this code, that must be inside the war classes, where the exception seems to be rising, but still don't understand what is happening there

protected void initStorage() {
/* Storage API */
    try {
        Class storage_api=Class.forName(config.getProperty("webmail.storage"));

        Class[] tmp=new Class[1];
        tmp[0]=Class.forName("net.wastl.webmail.server.WebMailServer");
        Constructor cons=storage_api.getConstructor(tmp);

        Object[] sargs=new Object[1];
        sargs[0]=this;

        storage=(Storage)cons.newInstance(sargs);

    } catch(InvocationTargetException e) {
        Throwable t=e.getTargetException();
        System.err.println("Nested exception: ");
        t.printStackTrace();
        System.err.println("Fatal error. Could not initialize. Exiting now!");
        System.exit(1);
    } catch(Exception e) {
        e.printStackTrace();
        System.err.println("Fatal error. Could not initialize. Exiting now!");
        System.exit(1);
    }
}

Answer 1

It's solved:

I was trying to deploy on a Windows OS, and the Catalina log was rising advise: "WARNING: This software has never been tested under your OS"

So, I deployed in a linux Tomcat and as soon as I added the CATALINA_HOME and the jars in the bin of the tomcat, it worked!

Despite the requirements of jwebmail are not specifying a system, wouldn't advise to try it on Windows, I don't think I'd ever succeeded

thanks to all!

Answer 2

You are getting a UnavailableException for the servlet WebMail. This is because it is currently (temporarely or permanently) unavailable. A reason for that could be a bad configuration of the servlet.

You could check the configuration of that servlet in your web.xml file. Also you could check the tomcat logs for some hints about what could be cause.

Note that in some earlier servlet specifications (2.3 and lower I think) the order of elements in web.xml matters.

Also note that oracle's javamail ist not the same as jwebmail. So do not expect to find the classes you are using there.