[consumer] Add rack-awareness (KIP-881) to assignors #4252
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Rebased onto latest protocol changes. |
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It would be a great change! |
emasab
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* [cooperative][manual commit] Prevent offsets from being committed when a rebalance is in progress and partitions are owned by consumer * Add test * Format * Ensure the operation is thread safe * Add missing test config * Don't propagate results if we decide to skip committing * fixing broken test * fixing typo * Add rack-awareness (KIP-881) to sticky-assignor * Fix minor issues with commiting only when not rebalancing * memory leak in test * test naming * test copyright * Fix style and remove rd_list_add_const --------- Co-authored-by: Roxane Fruytier <roxane.fruytier@datadoghq.com> Co-authored-by: William Morgan <william.morgan@crowdstrike.com> Co-authored-by: William Morgan <wmorgan6796@gmail.com>
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emasab
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This builds on the protocol change PR to add rack awareness to the Range Assignor.
I understand that this is quite a large PR, here are the main changes:
rd_kafka_range_assignor_assign_cband its call tord_kafka_topic_assignment_state_newform the entry points of the assignment algorithm, and should probably be seen first. The code is based on the AK RangeAssignor.java and it is recommended to keep that open.rd_kafka_range_assignor_unittest. Almost all the tests within RangeAssignorTest.java have been converted, except a few.For sticky assignor:
Start with rd_kafka_sticky_assignor_assign_cb. They match, almost completely, with the Java changes to AbstractStickyAssignor.java in this PR.. Additionally, a struct matching RackInfo in the Java implementation, is added.
There are, what I think are two pre-existing bugs in the implementation that I found while porting tests. They are marked in the commit itself as a comment (I will remove the comment after first round of reviews).
Unit test addition: tests missing or different from AbstractStickyAssignorTest.java are added, existing tests are parametrized to include rack cases (rack consumer, rack brokers, rack both).
Some refactoring of common functions across assignors and unit tests into rdkafka_assignor.h/c to avoid duplication.