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Posted to dev@kafka.apache.org by "David Jacot (Jira)" <ji...@apache.org> on 2024/03/14 07:56:00 UTC
[jira] [Resolved] (KAFKA-15997) Ensure fairness in the uniform assignor
[ https://issues.apache.org/jira/browse/KAFKA-15997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Jacot resolved KAFKA-15997.
---------------------------------
Resolution: Fixed
This issue got resolved by https://issues.apache.org/jira/browse/KAFKA-16249.
> Ensure fairness in the uniform assignor
> ---------------------------------------
>
> Key: KAFKA-15997
> URL: https://issues.apache.org/jira/browse/KAFKA-15997
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Emanuele Sabellico
> Assignee: David Jacot
> Priority: Minor
>
>
>
> Fairness has to be ensured in uniform assignor as it was in cooperative-sticky one.
> There's this test 0113 subtest u_multiple_subscription_changes in librdkafka where 8 consumers are subscribing to the same topic, and it's verifying that all of them are getting 2 partitions assigned. But with new protocol it seems two consumers get assigned 3 partitions and 1 has zero partitions. The test doesn't configure any client.rack.
> {code:java}
> [0113_cooperative_rebalance /478.183s] Consumer assignments (subscription_variation 0) (stabilized) (no rebalance cb):
> [0113_cooperative_rebalance /478.183s] Consumer C_0#consumer-3 assignment (2): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [5] (2000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [8] (4000msgs)
> [0113_cooperative_rebalance /478.183s] Consumer C_1#consumer-4 assignment (3): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [0] (1000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [3] (2000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [13] (1000msgs)
> [0113_cooperative_rebalance /478.184s] Consumer C_2#consumer-5 assignment (2): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [6] (1000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [10] (2000msgs)
> [0113_cooperative_rebalance /478.184s] Consumer C_3#consumer-6 assignment (2): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [7] (1000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [9] (2000msgs)
> [0113_cooperative_rebalance /478.184s] Consumer C_4#consumer-7 assignment (2): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [11] (1000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [14] (3000msgs)
> [0113_cooperative_rebalance /478.184s] Consumer C_5#consumer-8 assignment (3): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [1] (2000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [2] (2000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [4] (1000msgs)
> [0113_cooperative_rebalance /478.184s] Consumer C_6#consumer-9 assignment (0):
> [0113_cooperative_rebalance /478.184s] Consumer C_7#consumer-10 assignment (2): rdkafkatest_rnd24419cc75e59d8de_0113u_1 [12] (1000msgs), rdkafkatest_rnd24419cc75e59d8de_0113u_1 [15] (1000msgs)
> [0113_cooperative_rebalance /478.184s] 16/32 partitions assigned
> [0113_cooperative_rebalance /478.184s] Consumer C_0#consumer-3 has 2 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_1#consumer-4 has 3 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_2#consumer-5 has 2 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_3#consumer-6 has 2 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_4#consumer-7 has 2 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_5#consumer-8 has 3 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_6#consumer-9 has 0 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [0113_cooperative_rebalance /478.184s] Consumer C_7#consumer-10 has 2 assigned partitions (1 subscribed topic(s)), expecting 2 assigned partitions
> [<MAIN> /479.057s] 1 test(s) running: 0113_cooperative_rebalance
> [<MAIN> /480.057s] 1 test(s) running: 0113_cooperative_rebalance
> [<MAIN> /481.057s] 1 test(s) running: 0113_cooperative_rebalance
> [0113_cooperative_rebalance /482.498s] TEST FAILURE
> ### Test "0113_cooperative_rebalance (u_multiple_subscription_changes:2390: use_rebalance_cb: 0, subscription_variation: 0)" failed at test.c:1243:check_test_timeouts() at Thu Dec 7 15:52:15 2023: ###
> Test 0113_cooperative_rebalance (u_multiple_subscription_changes:2390: use_rebalance_cb: 0, subscription_variation: 0) timed out (timeout set to 480 seconds)
> ./run-test.sh: line 62: 3512920 Killed $TEST $ARGS
> ###
> ### Test ./test-runner in bare mode FAILED! (return code 137) ###
> ###{code}
>
>
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