Github user vrozov commented on a diff in the pull request:
https://github.com/apache/incubator-apex-core/pull/208#discussion_r50287318
--- Diff: engine/src/main/java/com/datatorrent/stram/StramLocalCluster.java
---
@@ -308,6 +313,24 @@ public StramLocalCluster(LogicalPlan dag) throws
IOException, ClassNotFoundExcep
this.dnmgr = new StreamingContainerManager(dag);
this.umbilical = new UmbilicalProtocolLocalImpl();
+ Method addURL;
+ URLClassLoader loader;
+ try {
+ loader = (URLClassLoader)ClassLoader.getSystemClassLoader();
--- End diff --
There is difference between `loader.getClass()` and `URLClassLoader.class`.
My proposal handles case when System class loader extends URLClassLoader.
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