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From Amit Lonkar <amitlon...@yahoo.com.INVALID>
Subject Re: Class Loader Problems with Tomcat 8 + Ant Task
Date Mon, 05 Oct 2015 23:11:32 GMT
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 2:47 PM, Christopher Schultz <chris@christopherschultz.net>
wrote:
> 
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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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