shanthoosh opened a new pull request #1252: Create coordinator steam in samza 
with compact.policy set to compact instead of delete.
URL: https://github.com/apache/samza/pull/1252
 
 
   
   Symptom: Coordinator kafka topic of a samza job currently gets created with 
cleanup.policy set to 'delete' instead of 'compact' for certain cases. This 
potentially leads to losing all the metadata(JobModel/Config) stored in 
coordinator stream for some samza jobs. This behavior was observed for hundreds 
of samza jobs within LI and would affect any job using recent samza-1.2 or 
samza-1.3 release in OSS.  
   
   Cause: The control-flow in KafkaSystemAdmin.createStream to build the 
coordinator stream spec swallows the essential kafka-topic configurations and 
passes along the empty configuration bag to the kafka-broker when creating the 
coordinator stream. This issue was introduced in 
[SAMZA-1868](https://issues.apache.org/jira/browse/SAMZA-1868). 
   
   Changes: Fix the topic-creation control-flow for the coordinator topics and 
generate the correct topic-configurations.
   
   Tests: Added unit tests to validate that the expected topic configuration 
bag was generated for the coordinator stream topics.
   
   API Changes: None
   
   Upgrade Instructions: None
   
   Usage Instructions: None
   
   

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