Sindhu Subhas commented on AMBARI-22580:

Fix for this is to add below snippet underĀ 
if 'postgres' == streamline_storage_type:
jdbc_driver_jar = default("/hostLevelParams/custom_postgres_jdbc_name", None)
if jdbc_driver_jar == None:
Logger.error("Failed to find postgres jar. Make sure you followed the steps to 
register mysql driver")
Logger.info("Users should register the mysql java driver jar.")
Logger.info("Create a symlink e.g. ln -s /usr/share/java/postgres94-jdbc.jar 
Logger.info("sudo ambari-server setup --jdbc-db=postgres 
Also, attached sample params.py.

> Streaming Analytics Manager (SAM) not working with PostgreSQL
> -------------------------------------------------------------
>                 Key: AMBARI-22580
>                 URL: https://issues.apache.org/jira/browse/AMBARI-22580
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server
>            Reporter: Unai P. Mendizabal
>            Priority: Major
> Hi!
> I was trying to install SAM on my Ambari cluster and trying to use the same 
> PostgreSQL database I use for Ambari server. The installation fails though, 
> with error "KeyError: 'jdbc_driver_jar" coming from the params.py file of the 
> Streamline service. I dived into it and realized that variable 
> 'jdbc_driver_jar' is never initialized for PostgreSQL databases, while it 
> does when it comes to Oracle or MySQL.
> The file is 
> /var/lib/ambari-server/resources/common-services/STREAMLINE/0.5.0/package/scripts/params.py,
>  you can see the problem from line 192 on. As a workaround, I think it should 
> be possible to manually set 'jdbc_driver_jar' to the path to the jdbc driver 
> on that same file.

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