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https://issues.apache.org/jira/browse/SAMZA-1765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shanthoosh Venkataraman reassigned SAMZA-1765:
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Assignee: Shanthoosh Venkataraman
> Containers fail to start on YARN with Error: Main method not found in class
> SamzaContainer
> ------------------------------------------------------------------------------------------
>
> Key: SAMZA-1765
> URL: https://issues.apache.org/jira/browse/SAMZA-1765
> Project: Samza
> Issue Type: Bug
> Components: container, yarn
> Affects Versions: 0.13.0, 0.14.0, 0.14.1
> Environment: Hadoop/YARN 2.7.4
> Reporter: Erika Ellison
> Assignee: Shanthoosh Venkataraman
> Priority: Blocker
>
> This issue is a critical blocker as we try to upgrade to Samza's latest
> release 0.14.1. I have also tested versions 0.14.0 and 0.13.0, where I saw
> the same behavior. The version of Samza we are upgrading from is 0.11.0.
> When I deploy a Samza app built against the new versions to YARN, I observe
> the following:
> Application Manager container gets launched and runs successfully.
> AM launches application containers, but the containers crash, before even
> samza-container-*.log is created and written to - stderr contains the
> following:
> {code:java}
> openjdk version "1.8.0_161"
> OpenJDK Runtime Environment (build 1.8.0_161-b14)
> OpenJDK 64-Bit Server VM (build 25.161-b14, mixed mode)
> Error: Main method not found in class
> org.apache.samza.container.SamzaContainer, please define the main method as:
> public static void main(String[] args)
> or a JavaFX application class must extend javafx.application.Application{code}
>
> Sure enough, looking at version 0.11.0, SamzaContainer.scala used to have a
> main method, and in newer versions it does not. Beyond that, I'm not sure
> where to start investigating.
> It may be worth noting that our Samza apps implement StreamTask, not the
> newer API of StreamApplication. There may be some straightforward change
> required to run apps implementing the older API on YARN, but I didn't find
> anything about that in the documentation.
> It may also be helpful to note that I can run Samza apps with the newer
> version locally via the LocalThreadJobRunner, and the run loop is
> successfully entered.
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