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https://issues.apache.org/jira/browse/KAFKA-994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13726536#comment-13726536
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Jay Kreps commented on KAFKA-994:
---------------------------------
Ack, nice catch.
> High level consumer doesn't throw an exception when the message it is trying
> to fetch exceeds the configured fetch size
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-994
> URL: https://issues.apache.org/jira/browse/KAFKA-994
> Project: Kafka
> Issue Type: Bug
> Components: consumer
> Affects Versions: 0.8
> Reporter: Sam Meder
> Assignee: Neha Narkhede
> Fix For: 0.8
>
> Attachments: messageSize.patch
>
>
> The high level consumer code is supposed to throw an exception when it
> encounters a message that exceeds its configured max message size. The
> relevant code form ConsumerIterator.scala is:
> // if we just updated the current chunk and it is empty that means the
> fetch size is too small!
> if(currentDataChunk.messages.validBytes == 0)
> throw new MessageSizeTooLargeException("Found a message larger than
> the maximum fetch size of this consumer on topic " +
> "%s partition %d at fetch
> offset %d. Increase the fetch size, or decrease the maximum message size the
> broker will allow."
>
> .format(currentDataChunk.topicInfo.topic,
> currentDataChunk.topicInfo.partitionId, currentDataChunk.fetchOffset))
> }
> The problem is that KAFKA-846 changed PartitionTopicInfo.enqueue:
> def enqueue(messages: ByteBufferMessageSet) {
> - val size = messages.sizeInBytes
> + val size = messages.validBytes
> if(size > 0) {
> i.e. chunks that contain messages that are too big (validBytes = 0) will
> never even be enqueued, so won't ever hit the too-large message check in
> ConsumerIterator...
> I've attached a patch that passes our tests...
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