Jason Gustafson created KAFKA-5322:
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Summary: Resolve AddPartitions response error code inconsistency
Key: KAFKA-5322
URL: https://issues.apache.org/jira/browse/KAFKA-5322
Project: Kafka
Issue Type: Sub-task
Reporter: Jason Gustafson
Assignee: Jason Gustafson
Priority: Blocker
The AddPartitions request does not support partial failures. Either all
partitions are successfully added to the transaction or none of them are.
Currently we return a separate error code for each partition that was added to
the transaction, which begs the question of what error code to return if we
have not actually encountered a fatal partition-level error for some partition.
For example, suppose we send AddPartitions with partitions A and B. If A is not
authorized, we will not even attempt to add B to the transaction, but what
error code should we use. The current solution is to only include partition A
and its error code in the response, but this is a little inconsistent with most
other request types. Alternatives that have been proposed:
1. Instead of a partition-level error, use one global error. We can add a
global error message to return friendlier details to the user about which
partition had a fault. The downside is that we would have to parse the message
contents if we wanted to do any partition-specific handling. We could not
easily fill the set of topics in {{TopicAuthorizationException}} for example.
2. We can add a new error code to indicate that the broker did not even attempt
to add the partition to the transaction. For example: OPERATION_NOT_ATTEMPTED
or something like that.
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