[esb-issues] [JBoss JIRA] Work logged: (JBESB-1069) GDP deployer servlet not working

[Bruno Unna (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBESB-1069?page=worklog#action_12377989 ]

Bruno Unna logged work on JBESB-1069:
-------------------------------------

            Time Spent: 2 hours
    Remaining Estimate: 0 minutes
            Time Spent: 2 hours

When starting up JBoss AS an exception used to apper in the log:

17:54:36,291 ERROR [[/jbpm-console]] Servlet /jbpm-console threw load() exception
java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileUploadException
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
        at java.lang.Class.getConstructor0(Class.java:2671)
        at java.lang.Class.newInstance0(Class.java:321)
        at java.lang.Class.newInstance(Class.java:303)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1104)
        ...

Even though the apache-commons upload utility library is clearly contained in the lib directory of the jbpm-console war file.

It seems that the java.lang.NoClassDefFoundError thrown when starting up the AS is the cause of the process uploading problem.

The upload servlet definition, in file ${JBOSSESB_HOME}/lib/jbpm.esb/jbpm-console.war/WEB-INF/web.xml , contains this lines:

<!-- This is the GDP's deployer servlet -->
<servlet>
    <servlet-name>GDP Deployer Servlet</servlet-name>
    <servlet-class>org.jbpm.web.ProcessUploadServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
	
The value '1' in element "load-on-startup" means this servlet must be loaded ASAP by the container. And I believe for some reason this happens before the classloader has access to the apache-commons upload utility class.

I commented out the load-on-startup element, thus allowing the container to load the class whenever it deemed convenient, after which the problem went away (as well as the startup error). I haven't found as of now any secondary effects of my action, so I dare to believe it is an acceptable solution to the error. 

> GDP deployer servlet not working
> --------------------------------
>
>                 Key: JBESB-1069
>                 URL: http://jira.jboss.com/jira/browse/JBESB-1069
>             Project: JBoss ESB
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Process flow
>    Affects Versions: 4.2
>            Reporter: Bruno Unna
>         Assigned To: Mark Little
>             Fix For: 4.2.1
>
>          Time Spent: 2 hours
>  Remaining Estimate: 0 minutes
>
> The jBPM Designer is unable to test the connection to jBPM in order to deploy a process definition. It is unable, as well, to perform the deployment.
> The "Test Connection..." button delivers a very uninformative error, but the JBoss AS console shows this line:
> 12:04:49,344 INFO  [[GDP Deployer Servlet]] Servlet GDP Deployer Servlet is currently unavailable

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