I would like to re-initiate the voting process for the "KIP-4 Metadata Schema changes". This is not a vote for all of KIP-4, but specifically for the metadata changes. I have included the exact changes below for clarity: > > Metadata Request (version 1) > > > > MetadataRequest => [topics] > > Stays the same as version 0 however behavior changes. > In version 0 there was no way to request no topics, and and empty list > signified all topics. > In version 1 a null topics list (size -1 on the wire) will indicate that a > user wants *ALL* topic metadata. Compared to an empty list (size 0) which > indicates metadata for *NO* topics should be returned. > Metadata Response (version 1) > > > > MetadataResponse => [brokers] controllerId [topic_metadata] > brokers => node_id host port rack > node_id => INT32 > host => STRING > port => INT32 > rack => NULLABLE_STRING > controllerId => INT32 > topic_metadata => topic_error_code topic is_internal [partition_metadata] > topic_error_code => INT16 > topic => STRING > is_internal => BOOLEAN > partition_metadata => partition_error_code partition_id leader [replicas] > [isr] > partition_error_code => INT16 > partition_id => INT32 > leader => INT32 > replicas => INT32 > isr => INT32 > > Adds rack, controller_id, and is_internal to the version 0 response. >
The KIP is available here for reference (linked to the Metadata schema section): *https://cwiki.apache.org/confluence/display/KAFKA/KIP-4+-+Command+line+and+centralized+administrative+operations#KIP-4-Commandlineandcentralizedadministrativeoperations-MetadataSchema <https://cwiki.apache.org/confluence/display/KAFKA/KIP-4+-+Command+line+and+centralized+administrative+operations#KIP-4-Commandlineandcentralizedadministrativeoperations-MetadataSchema>* A pull request is available implementing the proposed changes here: https://github.com/apache/kafka/pull/1095 Here are some links to past discussions on the mailing list: http://search-hadoop.com/m/uyzND1pd4T52H1m0u1&subj=Re+KIP+4+Wiki+Update http://search-hadoop.com/m/uyzND1J2IXeSNXAT&subj=Metadata+and+ACLs+wire+protocol+review+KIP+4+ Here is the previous vote discussion (please take a look and discuss there): http://search-hadoop.com/m/uyzND1xlaiU10QlYX&subj=+VOTE+KIP+4+Metadata+Schema Thank you, Grant -- Grant Henke Software Engineer | Cloudera [email protected] | twitter.com/gchenke | linkedin.com/in/granthenke
