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https://issues.apache.org/jira/browse/SOLR-16644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17773844#comment-17773844
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ASF subversion and git services commented on SOLR-16644:
--------------------------------------------------------
Commit 61d91b5284cc0857d18fc2d232de8a2aa32ef147 in solr's branch
refs/heads/branch_9_4 from Jan Høydahl
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=61d91b5284c ]
SOLR-16644: Only warn entropy on Linux (#2000)
(cherry picked from commit 4e9b330d9e7adb8eb866df8e148be21651eb6255)
> Entropy warning thresholds need to be revisited
> -----------------------------------------------
>
> Key: SOLR-16644
> URL: https://issues.apache.org/jira/browse/SOLR-16644
> Project: Solr
> Issue Type: Bug
> Reporter: Ishan Chattopadhyaya
> Priority: Major
> Labels: newdev
> Fix For: 9.4
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> 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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