leezu opened a new issue #17059: ARM CI cannot authenticate /install `autoconf` URL: https://github.com/apache/incubator-mxnet/issues/17059 ## Description https://github.com/apache/incubator-mxnet/issues/16753 error happens on CI as well. It seems to interact with the APT cache persistence. Once the invalid file get's into the cache, it is not deleted anymore and all subsequent CI runs fail. Ie apt will not delete and re-download the file, but rather throw an error: ### Error Message `WARNING: The following packages cannot be authenticated!` You can check - http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/mxnet-validation%2Fedge/detail/PR-17031/13/pipeline/ - http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/mxnet-validation%2Fedge/detail/PR-17031/14/pipeline/ - http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/mxnet-validation%2Fedge/detail/PR-17031/15/pipeline/ - http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/mxnet-validation%2Fedge/detail/PR-17031/16/pipeline/ which all fail due to the invalid `autconf` in apt cache. Only after extending my PR (https://github.com/apache/incubator-mxnet/pull/17031/commits/a94bbf808d30e00c52792f806fb32ffc3595b210) to include `apt-get clean` to clean the cache, does the build succeed in installing `autoconf`: http://jenkins.mxnet-ci.amazon-ml.com/blue/organizations/jenkins/mxnet-validation%2Fedge/detail/PR-17031/17/pipeline/ ## To Reproduce Not sure how to reproduce. Relies on getting invalid data into the CI cache.. ## Discussion How is caching is currently implemented? Is it specific to each branch / PR? Why did this caching error only occur in my PR and did not affect all other builds? CC @marcoabreu @larroy
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