[UIMA-6015] UIMA-DUCC: Uima version detection not working

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-Ducc
• Component/s: DUCC
• Assignee: Jaroslaw Cwiklik
• Reporter: Jaroslaw Cwiklik
• Created: 21/Mar/19 19:20
• Updated: 25/Mar/19 13:51
• Resolved: 25/Mar/19 13:51

Description

Before deploying a child process, an agent tries to determine which version of uima user wants to run with. It takes user specified classpath and loads the jars and resources into a Classloader. Using the Classloader it tries to instantiate UimaVersion class from uima-core.jar. The bug is that an agent tries to load the jar as user ducc. When the jar is located in a place which is not readable to ducc, the operation fails with:

java.lang.ClassNotFoundException: org.apache.uima.impl.UimaVersion
        at java.net.URLClassLoader.findClass(URLClassLoader.java:610)
        at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:925)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:870)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:853)
        at
org.apache.uima.ducc.agent.launcher.DuccCommandExecutor.getDeployableCommandLine(DuccCommandExecutor.java:819)
        at
org.apache.uima.ducc.agent.launcher.DuccCommandExecutor.exec(DuccCommandExecutor.java:142)
        at
org.apache.uima.ducc.agent.launcher.CommandExecutor.call(CommandExecutor.java:226)
        at
org.apache.uima.ducc.agent.launcher.CommandExecutor.call(CommandExecutor.java:36)
        at java.util.concurrent.FutureTask.run(FutureTask.java:277)
        at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1160)
        at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.lang.Thread.run(Thread.java:812)

 

Also, in case a user fails to provide uima-core.jar and the code fails as shown above, set the reason for failure so it is clear in duccmon why the process failed.