Ruler Pods OOM/spike in memory observed with warning log closing ingester client stream failed

[sivesh1989]

Issue: Ruler Pods OOM/spike in memory observed with warning closing ingester client stream failed.
Mimir version: 2.11.0
Deployment: Microservice mode
Environment: AKS cluster

We observe ruler pods having spike in memory utilization and at the same time observe below error,

method=Distributor.queryIngesterStream user=abc level=warn msg="closing ingester client stream failed" err="timed out waiting to exhaust stream after calling CloseSend, will continue exhausting stream in background"

Ruler POD Mem utilization graph:

Kindly let us know if there is any bug in cleaning up resources for rulers or help us resolve the issue.