A problem about download npm-package after invalidate cache

Sonatype Nexus Repository Best Practices
1

Hello team:
When I press invalidate cache of a group_nexus_repo, I can not download some npm package，the key logs as shown:

image
image1188×435 83.8 KB

There are many logs of this type, causing the service to be unavailable for short periods of time, the web can not browse, the logs like below picture(page1-5, 100 line/page):
image
image1181×896 37.8 KB

note: the blob storage use remote nfs，not physical disk;the version is OSS3.34.0.01
I have two question:

  1. Is this error caused by Nexus being unable to access the remote proxy repository to retrieve the latest metadata, or is it because Nexus cannot access the blobs?
  2. Why does the service unavailable?
2

I believe you will see this error if the client, or a network proxy between the client and Nexus terminates the connection

3

Thank you for your reply。
I think maybe it was because pulling npm-package too slow on Jenkins, so I terminated the task,the Jenkins client and Nexus disconnect
but another question: why the service unavailable? Is it because there is too much concurrency task on jenkins? I stop all the jenkins task, the service recovery.(Before I press invilidate cache, Even with many concurrent tasks, service is always availability)