milvus: [Bug]: 2.0.0 rc8 hang at creating index after idle for a while

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version: 2.0.0-rc8 
- Deployment mode(standalone or cluster):standalone
- SDK version(e.g. pymilvus v2.0.0rc2):2.0.0rc8
- OS(Ubuntu or CentOS): Ubuntu
- CPU/Memory: 128G
- GPU: N/A
- Others:

Current Behavior

I ran Milvus and let it be idle for about one week. After that Milvus can’t create index or load collection any more. I tried followings:

1. Using python API and cli both
2. reboot milvus

I didn’t see any error coming out of LOG. Nothing has changed. I eventually have to remove entire /volumes folder. Can someone help take a look at this issue? Thanks.

Expected Behavior

No response

Steps To Reproduce

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Anything else?

No response