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https://issues.apache.org/jira/browse/KAFKA-12534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17343196#comment-17343196
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Jordan Moore commented on KAFKA-12534:
--------------------------------------

It would appear my original comment has solved your error and the title of this 
issue (you no longer get SSL handshake errors)

I'm not sure about the remaining issues, however the error you posted does not 
include /etc/kafka/secrets in your properties, nor refers to a JKS file in the 
error message, so it's difficult to reproduce your error if you obfuscate 
filenames differently in the logs and properties 

> kafka-configs does not work with ssl enabled kafka broker.
> ----------------------------------------------------------
>
>                 Key: KAFKA-12534
>                 URL: https://issues.apache.org/jira/browse/KAFKA-12534
>             Project: Kafka
>          Issue Type: Bug
>    Affects Versions: 2.6.1
>            Reporter: kaushik srinivas
>            Priority: Critical
>
> We are trying to change the trust store password on the fly using the 
> kafka-configs script for a ssl enabled kafka broker.
> Below is the command used:
> kafka-configs.sh --bootstrap-server localhost:9092 --entity-type brokers 
> --entity-name 1001 --alter --add-config 'ssl.truststore.password=xxx'
> But we see below error in the broker logs when the command is run.
> {"type":"log", "host":"kf-2-0", "level":"INFO", 
> "neid":"kafka-cfd5ccf2af7f47868e83473408", "system":"kafka", 
> "time":"2021-03-23T12:14:40.055", "timezone":"UTC", 
> "log":\{"message":"data-plane-kafka-network-thread-1002-ListenerName(SSL)-SSL-2
>  - org.apache.kafka.common.network.Selector - [SocketServer brokerId=1002] 
> Failed authentication with /127.0.0.1 (SSL handshake failed)"}}
>  How can anyone configure ssl certs for the kafka-configs script and succeed 
> with the ssl handshake in this case ? 
> Note : 
> We are trying with a single listener i.e SSL: 



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