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https://issues.apache.org/jira/browse/CASSANDRA-14528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518925#comment-16518925
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mck commented on CASSANDRA-14528:
---------------------------------

{quote}Do you really need the nested String.format() within the logger lines? 
Why not just pass the exception as the final arg?{quote}
Yes. See  CASSANDRA-13723

The {{logger}} parameters for methods {{error(…)|warn(…)|log(…)|debug(…)}} is 
either {{(String, Throwable)}} or {{(String, Object…)}}.

So as soon as there's one format argument, then any tailing exception will also 
be interrupted as a format argument, and we get {{exception.toString()}}.
CASSANDRA-13723 improved that situation, replacing {{exception.toString()}} 
with {{exception.getMessage()}}. While this ticket re-introduces the stack 
traces.

> Provide stacktraces for various error logs
> ------------------------------------------
>
>                 Key: CASSANDRA-14528
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14528
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Stefan Podkowinski
>            Assignee: Stefan Podkowinski
>            Priority: Major
>             Fix For: 4.x
>
>
> We should reintroduce some stack traces that have gone missing since 
> CASSANDRA-13723 (ba87ab4e954ad2). The cleanest way would probably to use 
> {{String.format}} for any custom messages, e.g. 
> {{logger.error(String.format("Error using param {}", param), e)}}, so we make 
> this more implicit and robust for coming api changes.



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