Hi Guozhang, thanks for the information. I am implementing/maintaining the Golang producer [1] so I do need to worry about these details.
You mention LeaderNotAvailable as the only one, but the JIRA ticket I linked also talks about ReplicaNotAvailable. Are both of these ignored? Or is it that LeaderNotAvailable causes the metadata to be ignored, and *all* other partition-specific errors (including ReplicaNotAvailable) still carry legitimate data? Thanks, Evan [1] https://github.com/Shopify/sarama On Wed, Nov 26, 2014 at 1:11 PM, Guozhang Wang <wangg...@gmail.com> wrote: > Hi Evan, > > The error code is per-partition, and for new producer only > LeaderNotAvailable error will cause it to ignore the metadata for that > partition. If you are using the producer clients directly you would not > need to worry about these error handling details; if you are fetching the > metadata using a metadata request yourself and then you need to handle the > error code accordingly. > > I agree that such documentation is kind of lacking for now, and we would > better add that in the response class Java doc. > > Guozhang > > > On Tue, Nov 25, 2014 at 12:29 PM, Evan Huus <evan.h...@shopify.com> wrote: > > > Hi folks, > > > > I was wondering in which cases the PartitionMetadata section of a > > MetadataResponse [1] can contain useful information? > > > > I had been working under the assumption that when the PartitionErrorCode > > was 0 (NoError) then the rest of the data would be legitimate, and that > > when the error was non-0 then the rest of the data would be > > blank/empty/etc. > > > > However, I recently discovered a JIRA ticket [2] which suggests > otherwise, > > namely that there are certain error codes for which parts of the > remainder > > of the metadata may still be filled in. I have not found any explicit > > documentation for which error codes this is true. Does anybody know? > > > > Thanks, > > Evan > > > > P.S. I'm not 100% sure if this kind of question should go on users@ or > > dev@. > > Please let me know if I'm in the wrong place. > > > > [1] > > > > > https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol#AGuideToTheKafkaProtocol-MetadataResponse > > [2] https://issues.apache.org/jira/browse/KAFKA-1609 > > > > > > -- > -- Guozhang >
