Github user lianhuiwang commented on the pull request:
https://github.com/apache/spark/pull/1528#issuecomment-49756393
It add user defined priority to FIFO. If user don not configure priority,
it work as before. It is non-preemptive.when there has free executors we can
let high priority taskset's tasks firstly be submitted than lower priority
taskset.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
