[jira] [Created] (BIGTOP-2737) Spark charm doesn't handle HA or examples well

["Kevin W Monroe (JIRA)" <ji...@apache.org>]

Kevin W Monroe created BIGTOP-2737:
--------------------------------------

             Summary: Spark charm doesn't handle HA or examples well
                 Key: BIGTOP-2737
                 URL: https://issues.apache.org/jira/browse/BIGTOP-2737
             Project: Bigtop
          Issue Type: Bug
          Components: deployment
    Affects Versions: 1.2.0
            Reporter: Kevin W Monroe
            Assignee: Kevin W Monroe
            Priority: Minor
             Fix For: 1.3.0


The Spark charm can be reconfigured at runtime to work in local, standalone, standalone-HA (with zookeeper), or yarn modes.  In any of these modes, the user can run things like SparkPI to verify functionality.  There are a few problems with this in the current charm:

- transitioning out of HA mode does not reset the zk connection string correctly
- transitioning into HA mode before the zk ensemble has settled can cause the spark master to fetch invalid data from zk; ensure zk is settled before starting spark master
- master/worker services are always started; ensure we start services relevant for the execution mode *
- spark-examples.jar location has changed in spark2
- the add-on benchmark suite (sparkbench from ibm) is not compatible with spark 2.1; include a pagerank benchmark that works across 1.5 and 2.1

To ease future maintenance, the spark charm needs a good refactoring to simplify the reactive logic.  It's currently too hard to follow what is happening when the deployment topology changes.

* - this may belong in the spark puppet recipe, but it's easy enough to fix in the charm while investigating a better place.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)