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(Updated June 9, 2016, 10:30 a.m.) Review request for atlas. Changes ------- As described in this [comment](https://issues.apache.org/jira/browse/ATLAS-515?focusedCommentId=15320301&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15320301) on ATLAS-515, I am changing the approach to initializing Kafka topics from being automated to being script driven, where the script can be automated by installation tools like Ambari. Changes in this patch: * Retains KafkaTopicCreator class with the logic for setting up topics * Two python scripts - atlas_kafka_setup.py and atlas_kafka_setup_hook.py. * Changes to pom.xml to include the required dependencies Bugs: ATLAS-515 https://issues.apache.org/jira/browse/ATLAS-515 Repository: atlas Description ------- Attached patch provides a method to automatically create Kafka topics ATLAS_HOOK and ATLAS_ENTITIES with configured number of replicas. Diffs (updated) ----- distro/src/bin/atlas_client_cmdline.py f109ad3 distro/src/bin/atlas_config.py fab4046 distro/src/bin/atlas_kafka_setup.py PRE-CREATION distro/src/bin/atlas_kafka_setup_hook.py PRE-CREATION distro/src/conf/atlas-application.properties 873c1e0 distro/src/main/assemblies/standalone-package.xml 1c7b2c5 notification/pom.xml b3738db notification/src/main/java/org/apache/atlas/hook/AtlasTopicCreator.java PRE-CREATION notification/src/test/java/org/apache/atlas/hook/AtlasTopicCreatorTest.java PRE-CREATION pom.xml eac95c8 Diff: https://reviews.apache.org/r/48280/diff/ Testing ------- * Started multiple Kafka brokers on single machine, configured number of replicas to be 2, started Atlas server and verified they got created correctly. * Started multiple Kafka brokers on single machine, configured number of replicas to be 2, started Hive hook and verified it created ATLAS_HOOK correctly. Then started Atlas server and verified it by-passed ATLAS_HOOK creation, but did ATLAS_ENTITIES creation. * Started one Kafka broker, onfigured number of replicas to be 2, started Atlas server and verified it received an exception as expected. But topic could still get auto-created and continued. * Started 2 instances of Atlas server concurrently and verified topic creation is working fine. * Existing UTs/ITs/new UTs pass. Thanks, Hemanth Yamijala