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From "Thomas Weise (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (APEXCORE-767) Duplicate class loading in CLI for single application launch
Date Fri, 21 Jul 2017 08:25:00 GMT

    [ https://issues.apache.org/jira/browse/APEXCORE-767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16095953#comment-16095953
] 

Thomas Weise commented on APEXCORE-767:
---------------------------------------

Following change to use existing context class loader as parent resolved the issue:  

{code}
diff --git a/engine/src/main/java/com/datatorrent/stram/client/StramAppLauncher.java b/engine/src/main/java/com/datatorrent/stram/client/StramAppLauncher.java
index d4f0170f3..305502de6 100644
--- a/engine/src/main/java/com/datatorrent/stram/client/StramAppLauncher.java
+++ b/engine/src/main/java/com/datatorrent/stram/client/StramAppLauncher.java
@@ -535,7 +535,7 @@ public class StramAppLauncher

   public URLClassLoader loadDependencies()
   {
-    URLClassLoader cl = URLClassLoader.newInstance(launchDependencies.toArray(new URL[launchDependencies.size()]));
+    URLClassLoader cl = URLClassLoader.newInstance(launchDependencies.toArray(new URL[launchDependencies.size()]),
Thread.currentThread().getContextClassLoader());
     Thread.currentThread().setContextClassLoader(cl);
     StringCodecs.check();
     return cl;
{code}

> Duplicate class loading in CLI for single application launch 
> -------------------------------------------------------------
>
>                 Key: APEXCORE-767
>                 URL: https://issues.apache.org/jira/browse/APEXCORE-767
>             Project: Apache Apex Core
>          Issue Type: Bug
>            Reporter: Thomas Weise
>
> StramAppLauncher will create multiple class loaders in a way that leads to duplicate
loading of the same class (while listing app package, then when launching). It also appears
that the context class loader is never reset.
>  



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