mmooyyii opened a new issue, #1242:
URL: https://github.com/apache/datafusion-ballista/issues/1242
**Describe the bug**
add a print at InMemoryJobState.create_session
```rust
ballista/scheduler/src/cluster/memory.rs line 427
async fn create_session(
&self,
config: &SessionConfig,
) -> Result<Arc<SessionContext>> {
let session = create_datafusion_context(config,
self.session_builder.clone())?;
self.sessions.insert(session.session_id(), session.clone());
println!("session size: {}", self.sessions.len());
Ok(session)
}
```
then start a scheduler and executor and do some query;
session size will not decrease after QueryStageSchedulerEvent::JobDataClean
I also don't see some code to collect old session
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