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https://issues.apache.org/jira/browse/CASSANDRA-9384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16773369#comment-16773369
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Dinesh Joshi commented on CASSANDRA-9384:
-----------------------------------------

For trunk -

 # Abort start up if {{auth_bcrypt_gensalt_log2_rounds = 31}}
 # Upgrade the jbcrypt binary

For versions other than trunk (Approach 1) -

 # Abort start up if {{auth_bcrypt_gensalt_log2_rounds = 31}}
 # Upgrade the jbcrypt binary

With this approach, the operator will have to reduce 
{{auth_bcrypt_gensalt_log2_rounds}} before they upgrade C*.

For versions other than trunk (Approach 2) -

# Abort start up if {{auth_bcrypt_gensalt_log2_rounds = 31}}
# Allow operator to start C* with {{auth_bcrypt_gensalt_log2_rounds = 31}} if 
they pass in {{-Dcassandra.allow_unsafe_bcrypt}}
# Don't upgrade the jbcrypt binary

Any preferences for which of the two approaches we should use for non-trunk 
versions?



> Update jBCrypt dependency to version 0.4
> ----------------------------------------
>
>                 Key: CASSANDRA-9384
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9384
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sam Tunnicliffe
>            Assignee: Dinesh Joshi
>            Priority: Major
>             Fix For: 2.1.x, 2.2.x, 3.0.x, 3.11.x
>
>
> https://bugzilla.mindrot.org/show_bug.cgi?id=2097
> Although the bug tracker lists it as NEW/OPEN, the release notes for 0.4 
> indicate that this is now fixed, so we should update.
> Thanks to [~Bereng] for identifying the issue.



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