GitHub user sumitchawla opened a pull request: https://github.com/apache/incubator-beam/pull/1013
BEAM-682-Invoker Class should be created in Thread Context Classloader As of now the InvokerClass is being loaded in wrong classloader. It should be loaded into Thread.currentThread.getContextClassLoader() https://github.com/apache/incubator-beam/blob/master/sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/reflect/DoFnInvokers.java#L167 Class<? extends DoFnInvoker<?, ?>> res = (Class<? extends DoFnInvoker<?, ?>>) unloaded .load(DoFnInvokers.class.getClassLoader(), ClassLoadingStrategy.Default.INJECTION) .getLoaded(); Fix Class<? extends DoFnInvoker<?, ?>> res = (Class<? extends DoFnInvoker<?, ?>>) unloaded .load(Thread.currentThread().getContextClassLoader(), ClassLoadingStrategy.Default.INJECTION) .getLoaded(); You can merge this pull request into a Git repository by running: $ git pull https://github.com/sumitchawla/incubator-beam classloader_fix Alternatively you can review and apply these changes as the patch at: https://github.com/apache/incubator-beam/pull/1013.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #1013 ---- commit ecb7fc6c7ec7b0a2016f7da5edf9cf7f3bc9ace4 Author: Sumit Chawla <sumic...@cisco.com> Date: 2016-09-27T02:45:22Z BEAM-682-Invoker Class should be created in Thread Context Classloader ---- --- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. ---