> On April 5, 2016, 9:55 p.m., Navina Ramesh wrote:
> > samza-shell/src/main/bash/run-am.sh, line 28
> > <https://reviews.apache.org/r/44920/diff/3/?file=1325334#file1325334line28>
> >
> >     It's kind of confusing when you set samza.container.name to be 
> > "samza-application-master" and then, run "ClusterBasedJobCoordinator" that 
> > is meant to be cluster-agnostic.
> >     
> >     Can you please clarify why this has to remain samza-application-master?

Thanks for the feedback! Actually the run-am.sh script should just run the AM. 
I'll write a separate run-jc.sh script with the main class as ClusterBasedJC.


> On April 5, 2016, 9:55 p.m., Navina Ramesh wrote:
> > samza-core/src/main/java/org/apache/samza/clustermanager/ContainerProcessManager.java,
> >  line 109
> > <https://reviews.apache.org/r/44920/diff/3/?file=1325321#file1325321line109>
> >
> >     Why not move this class loader helper method into ClusterManagerConfig? 
> > It can return the ResourceManagerFactory class directly and the config API 
> > will be re-usable.

I recommend that an implementation of Config should return/validate the *value* 
of the property that the user configured. Instantiation of it using 
ClassLoaders / deciding what to do with it may be done higher up the stack (as 
it's done currently). This is done consistently in all other parts of the Samza 
code base. Happy to chat in person if you think otherwise.


- Jagadish


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On April 6, 2016, 5:31 p.m., Jagadish Venkatraman wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/44920/
> -----------------------------------------------------------
> 
> (Updated April 6, 2016, 5:31 p.m.)
> 
> 
> Review request for samza, Boris Shkolnik, Chris Pettitt, Jake Maes, Yi Pan 
> (Data Infrastructure), Navina Ramesh, and Xinyu Liu.
> 
> 
> Repository: samza
> 
> 
> Description
> -------
> 
> 1.Proposed new APIs for running Samza without Yarn. (SAMZA-881)
>    - Defined the ContainerProcessManager abstraction.
>    - Defined the SamzaResource, SamzaResourceRequest. 
>    - Re-wrote the SamzaAppMaster logic into a ClusterBasedJobCoordinator.
> 2.Defined a ClusterManagerConfig to handle configurations independent of 
> Yarn/Mesos.
> 3.Made Samza completely independent of Yarn. This cleanly separates Samza 
> specific components and Yarn
> specific components.
> 4.Readability improvements to the existing code base.
>    -Added explicity documentation for every method, member and class 
> (including on thread-safety)
>    - Made internal variables final to document intent, visibility across 
> threads. (trivially by adding modifiers, or by changing where they're 
> initialized.)
> 5.Refactored JobCoordinator into a JobModelReader.
> 
> == Diff2 ==
> Address Chriss review feedback.
> 
> Design Doc: 
> https://issues.apache.org/jira/secure/attachment/12790540/SamzaJobCoordinatorRe-designProposal.pdf
> 
> == Diff 3 ==
> Address Yi's feedback
> 
> 
> Diffs
> -----
> 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/AbstractContainerAllocator.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ClusterBasedJobCoordinator.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ClusterResourceManager.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ContainerAllocator.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ContainerProcessManager.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ContainerRequestState.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/HostAwareContainerAllocator.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ResourceFailure.java 
> PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/ResourceManagerFactory.java
>  PRE-CREATION 
>   samza-core/src/main/java/org/apache/samza/clustermanager/SamzaAppState.java 
> PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/SamzaContainerLaunchException.java
>  PRE-CREATION 
>   samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResource.java 
> PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResourceRequest.java
>  PRE-CREATION 
>   
> samza-core/src/main/java/org/apache/samza/clustermanager/SamzaResourceStatus.java
>  PRE-CREATION 
>   samza-core/src/main/java/org/apache/samza/config/ClusterManagerConfig.java 
> PRE-CREATION 
>   
> samza-core/src/main/scala/org/apache/samza/coordinator/JobModelManager.scala 
> PRE-CREATION 
>   
> samza-core/src/main/scala/org/apache/samza/metrics/ContainerProcessManagerMetrics.scala
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockClusterResourceManager.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockClusterResourceManagerCallback.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerAllocator.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerListener.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockContainerRequestState.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/MockHttpServer.java 
> PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerAllocator.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerProcessManager.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/TestContainerRequestState.java
>  PRE-CREATION 
>   
> samza-core/src/test/java/org/apache/samza/clustermanager/TestHostAwareContainerAllocator.java
>  PRE-CREATION 
>   samza-shell/src/main/bash/run-am.sh 
> 9545a96953baaff17ad14962e02bc12aadbb1101 
>   
> samza-yarn/src/main/java/org/apache/samza/job/yarn/HostAwareContainerAllocator.java
>  979719687be864bf24354aea0a7dc51b5f11a712 
>   samza-yarn/src/main/java/org/apache/samza/job/yarn/SamzaTaskManager.java 
> caee6e6c182d3cf86bd4fe193f8b1797605b2480 
>   
> samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnAppState.java 
> PRE-CREATION 
>   
> samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnClusterResourceManager.java
>  PRE-CREATION 
>   
> samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnContainerRunner.java
>  PRE-CREATION 
>   
> samza-yarn/src/main/java/org/apache/samza/job/yarn/refactor/YarnResourcemanagerFactory.java
>  PRE-CREATION 
>   
> samza-yarn/src/main/scala/org/apache/samza/job/yarn/refactor/SamzaAppMasterService.scala
>  PRE-CREATION 
>   
> samza-yarn/src/main/scala/org/apache/samza/job/yarn/refactor/SamzaYarnAppMasterLifecycle.scala
>  PRE-CREATION 
>   
> samza-yarn/src/test/java/org/apache/samza/job/yarn/TestHostAwareContainerAllocator.java
>  0c7a09f3e4c4c2ce6788be729d0bf4a294243c68 
> 
> Diff: https://reviews.apache.org/r/44920/diff/
> 
> 
> Testing
> -------
> 
> Tested with sample jobs on clusters of varying sizes. Tested locally. TODO: 
> Unit tests.
> 
> 
> Thanks,
> 
> Jagadish Venkatraman
> 
>

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