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https://issues.apache.org/jira/browse/CASSANDRA-19508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17833992#comment-17833992
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Jon Meredith commented on CASSANDRA-19508:
------------------------------------------

[~Aburadeh]Thanks for updating the patch, [~brandon.williams] thanks for 
rerunning CI, I ran out of time to kick off a run yesterday.

+1 from me.

> Getting tons of msgs "Failed to get peer certificates for peer 
> /x.x.x.x:45796" when require_client_auth is set to false
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-19508
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19508
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Feature/Encryption
>            Reporter: Mohammad Aburadeh
>            Assignee: Mohammad Aburadeh
>            Priority: Urgent
>             Fix For: 4.0.x, 4.1.x, 5.0.x, 5.x
>
>
> We recently upgraded our production clusters from 3.11.15 to 4.1.4. We 
> started seeing thousands of msgs "Failed to get peer certificates for peer 
> /x.x.x.x:45796". SSL is enabled but require_client_auth is disabled.  This is 
> causing a huge problem for us because cassandra log files are growing very 
> fast as our connections are short live connections, we open more than 1K 
> connections per second and they stay live for 1-2 seconds. 
> {code:java}
> DEBUG [Native-Transport-Requests-2] 2024-03-31 21:26:38,026 
> ServerConnection.java:140 - Failed to get peer certificates for peer 
> /172.31.2.23:45796
> javax.net.ssl.SSLPeerUnverifiedException: peer not verified
>         at 
> io.netty.handler.ssl.ReferenceCountedOpenSslEngine$DefaultOpenSslSession.getPeerCertificateChain(ReferenceCountedOpenSslEngine.java:2414)
>         at 
> io.netty.handler.ssl.ExtendedOpenSslSession.getPeerCertificateChain(ExtendedOpenSslSession.java:140)
>         at 
> org.apache.cassandra.transport.ServerConnection.certificates(ServerConnection.java:136)
>         at 
> org.apache.cassandra.transport.ServerConnection.getSaslNegotiator(ServerConnection.java:120)
>         at 
> org.apache.cassandra.transport.messages.AuthResponse.execute(AuthResponse.java:76)
>         at 
> org.apache.cassandra.transport.Message$Request.execute(Message.java:255)
>         at 
> org.apache.cassandra.transport.Dispatcher.processRequest(Dispatcher.java:166)
>         at 
> org.apache.cassandra.transport.Dispatcher.processRequest(Dispatcher.java:185)
>         at 
> org.apache.cassandra.transport.Dispatcher.processRequest(Dispatcher.java:212)
>         at 
> org.apache.cassandra.transport.Dispatcher$RequestProcessor.run(Dispatcher.java:109)
>         at 
> org.apache.cassandra.concurrent.FutureTask$1.call(FutureTask.java:96)
>         at org.apache.cassandra.concurrent.FutureTask.call(FutureTask.java:61)
>         at org.apache.cassandra.concurrent.FutureTask.run(FutureTask.java:71)
>         at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:142)
>         at 
> io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
>  {code}
> *Our SSL config:*
> {code:java}
> client_encryption_options:
>   enabled: true
>   keystore: /path/to/keystore
>   keystore_password: xxxxx
>   optional: false
>   require_client_auth: false {code}
>  
> We should stop throwing this msg when require_client_auth is set to false. Or 
> at least it should be logged in TRACE not DEBUG. 
> I'm working on preparing a PR. 



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