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(Updated July 28, 2015, 2:39 a.m.) Review request for samza, Yi Pan (Data Infrastructure), Navina Ramesh, and Naveen Somasundaram. Repository: samza Description ------- After a job is submitted, it might need some configuration change, specifically it might need more containers. In SAMZA-704 a tool is being added to write to the coordinator stream (CoordinatorStreamWriter). This tool can be used to write new configurations to the coordinator stream. However, another tool (ConfigManager) is needed to read the config changes and react to them, which is the goal of this task. This tool should be brought up after the job is submitted and read any config changes added to the coordinator stream, and react to each accordingly. This tool, called the Config Manager, is focusing on handling container changs by reacting to set-config massages with key "yarn.container.count". The config manager is a separate standa alone module, that should be brought up separately after the submission of a job. Therefore, you have to add two configurations to the input config file: 1. yarn.rm.address= <ip of resource manager in yarn. ex: localhost > 2. yarn.rm.port= <the port of the resource manager http server. ex: 8088 > The config manger will periodically poll the coordinator stream to see if there are any new messages. This period is set to 100 ms by deafualt. However, it can be configured by adding configManager.polling.interval=<polling interval> to the input config file. Thus, overal the command to run the config manager along with the job would be: <path to samza deployment>/bin/run-config-manager.sh --config-factory=<config factory> --config-path=<path to config file of a job> Diffs ----- build.gradle 0852adc4e8e0c2816afd1ebf433f1af6b44852f7 checkstyle/import-control.xml 6654319392929857bb861d77763afd8a5ea7674c gradle/dependency-versions.gradle fb06e8ed393d1a38abfa1a48fe5244fc7f6c7339 samza-autoscaling/src/main/java/org/apache/samza/autoScaling/deployer/ConfigManager.java PRE-CREATION samza-autoscaling/src/main/java/org/apache/samza/autoScaling/utils/YarnUtil.java PRE-CREATION samza-core/src/main/java/org/apache/samza/coordinator/stream/CoordinatorStreamSystemConsumer.java b1078bdf7bddd16c9ccc6559b9efd40ca5ae67bc samza-core/src/main/scala/org/apache/samza/job/JobRunner.scala 1c178a661e449c6bdfc4ce431aef9bb2d261a6c2 samza-shell/src/main/bash/run-config-manager.sh PRE-CREATION samza-test/src/test/scala/org/apache/samza/test/integration/TestStatefulTask.scala ea702a919348305ff95ce0b4ca1996a13aff04ec samza-yarn/src/main/scala/org/apache/samza/job/yarn/SamzaAppMasterService.scala ce88698c12c4bf6f4cf128f92d60b0b9496997d7 settings.gradle 19bff971ad221084dac10d3f7f3facfa42b829a7 Diff: https://reviews.apache.org/r/36006/diff/ Testing (updated) ------- Tested with hello samza and works properly. Thanks, Shadi A. Noghabi
