Github user jerryshao commented on the issue:
https://github.com/apache/spark/pull/18230
@vanzin "reload" here meanings retrieving back `SparkConf` from checkpoint
file and using this retrieved `SparkConf` to create `SparkContext` when
restarting streaming application.
This is a streaming specific operation, the original purpose is to keep
restarted streaming application be the same state (as well as configurations)
as the previous stopped app. But in Spark we have some configurations which are
only meaningful in the current application, so recovering these for restarted
app is meaningless and will lead to some issues. And for this purpose Spark
Streaming maintains a `propertiesToReload` list which means these
configurations will be not be reloaded, instead they will be set during current
application-time.
---
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.
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
