[GitHub] [kafka] fvaleri commented on a diff in pull request #13050: MINOR: add error reason when controller failed to handle events

[GitBox]

fvaleri commented on code in PR #13050:
URL: https://github.com/apache/kafka/pull/13050#discussion_r1059285394


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metadata/src/main/java/org/apache/kafka/controller/QuorumController.java:
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@@ -432,8 +432,8 @@ private Throwable handleEventException(String name,
                                            OptionalLong startProcessingTimeNs,
                                            Throwable exception) {
         if (!startProcessingTimeNs.isPresent()) {
-            log.error("{}: unable to start processing because of {}.", name,
-                exception.getClass().getSimpleName());
+            log.error("{}: unable to start processing because of {}. Reason: 
{}", name,

Review Comment:
   From a debugging point of view, I think that the stack trace may be useful 
if it is not an instance of a known exception, otherwise the error message is 
sufficient.



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