Re: Class Loader Problems with Tomcat 8 + Ant Task

[Amit Lonkar <am...@yahoo.com.INVALID>]

Hi Chris

Any ideas why the Ant Task might be failing in Tomcat 8? 
Yes the application works on a clean fresh tomcat 7 but not on tomcat 8.

We have a Administrator application that is used for patching our scheduling software. The patch includes the war files and get deployed to all nodes using the Ant Task.

Thanks
Amit

 


> On Sep 25, 2015, at 2:55 PM, Amit Lonkar <am...@yahoo.com.INVALID> wrote:
> 
> Yes its an Administrator web application used to deploy our product war files to customers via a patch. I just posted a example of a servlet to help reproduce it.
> 
> — Amit
>> On Sep 25, 2015, at 2:47 PM, Christopher Schultz <ch...@christopherschultz.net> wrote:
>> 
>> -----BEGIN PGP SIGNED MESSAGE-----
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>> 
>> Amit,
>> 
>> On 9/24/15 2:24 PM, Amit Lonkar wrote:
>>> We are trying to upgrade from Tomcat 7 to Tomcat 8. One of the 
>>> functionalities we have is to deploy a war file using the
>>> DeployTask class. I have a simple test servlet that uses the
>>> DeployClass.
>> 
>> Stop right there.
>> 
>> You have a servlet that is using the DeployTask for something? That
>> sounds ... astoundingly weird to me. Can you explain this use case?
>> The only thing I can think of is a web application used to deploy web
>> applications.
>> 
>>> I keep getting he following exception. I have ant 1.9.6 and 
>>> catalina-ant-8.0.26 in the class path. The maven project is
>>> attached. Works fine on Tomcat 7.0.64 but not on Tomcat 8.0.26.
>>> 
>>> *Tomcat Version: *8.0.26 *Java:* jdk1.8.0_45 *OS:* OSX *Class
>>> Path:*
>>> 
>>> * ant-1.9.6 * ant-launcher-1.9.6 * javax.servlet-api-3.1.0 *
>>> tomcat-api-8.0.26 * tomcat-catalina-ant-8.0.26 *
>>> tomcat-juli-8.0.26 * tomcat-servlet-api-8.0.26 *
>>> tomcat-util-8.0.26 * tomcat-util-scan-8.0.26
>>> 
>>> 
>>> *Exception Message:* javax.servlet.ServletException: Servlet
>>> execution threw an exception
>>> 
>>> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
>>> 
>>> *root cause*
>>> 
>>> java.lang.NoClassDefFoundError: org/apache/tools/ant/Task 
>>> java.lang.ClassLoader.defineClass1(Native Method) 
>>> java.lang.ClassLoader.defineClass(ClassLoader.java:760) 
>>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142
>> )
>>> 
>>> 
>> java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
>>> java.net.URLClassLoader.access$100(URLClassLoader.java:73) 
>>> java.net.URLClassLoader$1.run(URLClassLoader.java:368)
>>> 
>>> 
>>> // Exception is thrown when trying to instantiate DeployTask
>>> 
>>> DeployTask oTask = new DeployTask(); oTask.setAlwaysLog(true); 
>>> oTask.setAppend(false); oTask.setCreateEmptyFiles(true); 
>>> oTask.setError(oTaskError); oTask.setFailonerror(true); 
>>> oTask.setLogError(true); oTask.setOutput(oTaskOutput); 
>>> oTask.setPassword("adminManagerScript"); oTask.setPath("/broker"); 
>>> oTask.setProject(new Project()); oTask.setTag("v7"); 
>>> oTask.setUpdate(true); 
>>> oTask.setUrl("http://localhost:8080/manager/text"); 
>>> oTask.setUsername("adminManagerScript"); 
>>> oTask.setWar("/Users/amitlonkar/Documents/Builds/2015-09-23_1612/v7bro
>> ker.war");
>>> 
>>> 
>> oTask.execute();
>> 
>> This application works on a clean, fresh Tomcat 7 but not on a clean,
>> fresh Tomcat 8?
>> 
>> - -chris
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>> 
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