[jira] [Created] (SOLR-16644) Entropy warning thresholds need to be revisited

["Ishan Chattopadhyaya (Jira)" <ji...@apache.org>]

Ishan Chattopadhyaya created SOLR-16644:
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             Summary: Entropy warning thresholds need to be revisited
                 Key: SOLR-16644
                 URL: https://issues.apache.org/jira/browse/SOLR-16644
             Project: Solr
          Issue Type: Bug
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Ishan Chattopadhyaya


As per the following, newer kernels (5.15+) have recalibrated the entropy levels from 0-4096 to 0-256. Hence, everything is throwing a warning:
{code}
Warning: Available entropy is low. As a result, use of the UUIDField, SSL, or any other features that require
RNG might not work properly. To check for the amount of available entropy, use 'cat /proc/sys/kernel/random/entropy_avail'.
{code}

Here's where I found out about this change:
https://askubuntu.com/questions/1427470/entropy-is-stuck-at-256-after-upgrading-to-kernel-5-15-0-47

We might need to intelligently report the low entropy (based on kernel version).



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