WweiL commented on code in PR #40937:
URL: https://github.com/apache/spark/pull/40937#discussion_r1177124740
##########
connector/connect/server/src/main/scala/org/apache/spark/sql/connect/planner/SparkConnectPlanner.scala:
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@@ -2092,6 +2097,11 @@ class SparkConnectPlanner(val session: SparkSession) {
case path => writer.start(path)
}
+ // Register the new query so that the session and query references are
cached.
+ SparkConnectService.streamingSessionManager.registerNewStreamingQuery(
Review Comment:
If the query throws before this line (basically in query creation, which is
common I believe, for example wrong config is set, then
IllegalArgumentException would be thrown
[example](https://github.com/apache/spark/blob/b26844ce879ac0097d6e1a95da18a5c3ef3c9284/connector/kafka-0-10-sql/src/main/scala/org/apache/spark/sql/kafka010/KafkaSourceProvider.scala#L227-L268)).
What would happen?
My guess is that the user could see the error as it's handled by existing
error-handling framework in SparkConnectService. But when they try to access
the query, the `orElse` below would be triggered:
```
val query = SparkConnectService.streamingSessionManager
.findCachedQuery(id, session) // Common case: query is cached in
connect session manager.
.orElse { // Else try to find it in active streams. Mostly will not be
found here.
Option(session.streams.get(id))
```
And that'd still return a query ID not found exception?
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