pkg/agent/core/ngt/service/New blocks startup process of agent-ngt

[rinx]

Describe the bug:

with invalid NGT backup files, pkg/agent/core/ngt/service/New blocks startup process of agent-ngt.

To Reproduce:

put invalid backup files in index_path and enable_in_memory_mode=false.

Expected behavior:

Maybe there are two options to fallback the application. 🤔

• restart pod and retry to load
• start daemon without backup data.

Environment:

• Go Version: 1.14.3
• Docker Version: 19.03.8
• Kubernetes Version: 1.18.2
• NGT Version: 1.11.5

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[kpango]

Thank you for your feedback.
I think restart pod and download again looks good.
If we start daemon without backup data, S3 back up data will be overwritten, it makes problem for data consistency

[rinx]

resolved in #503