[BIGTOP-2795] spark charm: fix sparkpi and rework start/stop logic

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.2.1
• Assignee: Kevin Monroe
• Reporter: Kevin Monroe
• Created: 02/Jun/17 18:40
• Updated: 05/Jun/17 05:14
• Resolved: 05/Jun/17 05:14

Description

The current spark charm has a couple problems:

• The sample workload (delivered as ~/sparkpi.sh) hard codes the spark-examples.jar path, and it's incorrect for spark2.
• Expose the spark worker ui port (8081) when appropriate.
• We only need to open the master ui port (8080) if we're in standalone mode. There is no master process running in yarn or local modes.
• We should only wait for master recovery if we have peers. It's important to wait for recovery before starting workers in a multi-node cluster, but for single-node, this is a waste of time.

Issue Links

• links to: GitHub Pull Request #229