belliottsmith commented on code in PR #4936:
URL: https://github.com/apache/cassandra/pull/4936#discussion_r3594609357
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src/java/org/apache/cassandra/transport/PreV5Handlers.java:
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@@ -337,7 +337,9 @@ public void exceptionCaught(final ChannelHandlerContext
ctx, Throwable cause)
if (ctx.channel().isOpen())
{
Predicate<Throwable> handler =
ExceptionHandlers.getUnexpectedExceptionHandler(ctx.channel(), false);
- ErrorMessage errorMessage = ErrorMessage.fromException(cause,
handler);
+ // No request in scope at the channel level; a
WrappedException cause carries the frame's
+ // stream id and overrides this fallback, otherwise the
channel is torn down for fatal errors.
+ ErrorMessage errorMessage = ErrorMessage.fromException(cause,
Message.NO_REQUEST_STREAM_ID, handler);
Review Comment:
If we expect this to be overridden, why are we specifying
NO_REQUEST_STREAM_ID, rather than UNSET_STREAM_ID?
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