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Posted to jira@kafka.apache.org by "Emanuele Sabellico (Jira)" <ji...@apache.org> on 2024/01/16 18:11:00 UTC
[jira] [Updated] (KAFKA-16147) Partition is assigned to two members at the same time
[ https://issues.apache.org/jira/browse/KAFKA-16147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Emanuele Sabellico updated KAFKA-16147:
---------------------------------------
Description:
While running test 0113 of librdkafka, subtest _u_multiple_subscription_changes_ have received this error saying that a partition is assigned to two members at the same time.
{code:java}
Error: C_6#consumer-9 is assigned rdkafkatest_rnd550f20623daba04c_0113u_2 [0] which is already assigned to consumer C_5#consumer-8 {code}
I've reconstructed this sequence:
C_5 SUBSCRIBES TO T1
{noformat}
%7|1705403451.561|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 6, group instance id "(null)", current assignment "", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"{noformat}
C_5 ASSIGNMENT CHANGES TO T1-P7, T1-P8, T1-P12
[2024-01-16 12:10:51,562] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=6, previousMemberEpoch=0, targetMemberEpoch=6, state=assigning, assignedPartitions={}, partitionsPendingRevocation={}, partitionsPendingAssignment=\{IKXGrFR1Rv-Qes7Ummas6A=[3, 12]}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions=\{IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
C_5 RECEIVES TARGET ASSIGNMENT
%7|1705403451.565|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"
C_5 ACKS TARGET ASSIGNMENT
{code:java}
%7|1705403451.566|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[7], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[8], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[12]", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
%7|1705403451.567|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"{code}
C_5 SUBSCRIBES TO T1,T2: T1 partitions are revoked, 5 T2 partitions are pending
{code:java}
%7|1705403452.612|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
[2024-01-16 12:10:52,615] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager)
[2024-01-16 12:10:52,616] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
%7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment ""{code}
C_5 FINISHES REVOCATION
{code:java}
%7|1705403452.618|CGRPJOINSTATE|C_5#consumer-8| [thrd:main]: Group "rdkafkatest_rnd53b4eb0c2de343_0113u" changed join state wait-assign-call -> steady (state up){code}
C_5 ACKS REVOCATION, RECEIVES T2-P0,T2-P1,T2-P2
%7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "", subscribe topics "NULL"
[2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation=\{IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment=\{EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions=\{EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment=\{EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
%7|1705403452.620|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]"
%7|1705403452.621|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 16, group instance id "NULL", current assignment "rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[0], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[1], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[2]", subscribe topics "NULL"
%7|1705403452.622|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]"
LATER C_6 SUBSCRIBES TO T2,T1, IT RECEIVES T1-P9,T1-P13,T1-P15 AND T2-P0. T2-P0 is assigned without being revoked from C_5.
{code:java}
%7|1705403453.612|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "ss189cxiQ4q_cyNB1aNrfA", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
[2024-01-16 12:10:53,612] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager)
[2024-01-16 12:10:53,613] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Bumped group epoch to 17. (org.apache.kafka.coordinator.group.GroupMetadataManager)
[2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Computed a new target assignment for epoch 17 with 'uniform' assignor: {SWlBlUvBQpqdl93hD6SJOA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[2, 4, 5]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), RaTCu6RXQH-FiSl95iZzdw=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[1, 2, 8, 9, 10]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), mhzGxxF2R-Oa3BQGotzx7A=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), i7qqdVw4S0KZR5J5Z0XvoQ=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[1, 3, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), d6cbfWsfTt-7XdYU23MNaw=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[10, 11, 14]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), ss189cxiQ4q_cyNB1aNrfA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), 2vIQ0F6NRlOd9RgnVKtuDg=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[0, 6, 9, 12]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), pOvUx45IT-CJDvBQlfvVbQ=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[11, 12, 13, 14, 15]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0]))}. (org.apache.kafka.coordinator.group.GroupMetadataManager)
[2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=9, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[13, 15]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=17, previousMemberEpoch=14, targetMemberEpoch=17, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
[0m%7|1705403453.616|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[13], (null)(IKXGrFR1Rv+Qes7Ummas6A)[15], (null)(EnZMikZURKiUoxZf0rozaA)[0]"{code}
I also see in consecutive broker logs that the same partition T2-P0, but also T2-P1 and T2-p2, is assigned to C_5 (RaTCu6RXQH-FiSl95iZzdw) and pending revocation from a third one (member id mhzGxxF2R-Oa3BQGotzx7A)
{code:java}
[2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
[2024-01-16 12:10:52,620] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member mhzGxxF2R-Oa3BQGotzx7A transitioned from CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=15, state=stable, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 3, 4, 5, 6, 7]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=16, state=revoking, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, partitionsPendingRevocation={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager){code}
was:
While running test 0113 of librdkafka, subtest _u_multiple_subscription_changes_ have received this error saying that a partition is assigned to two members at the same time.
{code:java}
Error: C_6#consumer-9 is assigned rdkafkatest_rnd550f20623daba04c_0113u_2 [0] which is already assigned to consumer C_5#consumer-8 {code}
I've reconstructed this sequence:
C_5 SUBSCRIBES TO T1
{code:java}
%7|1705403451.561|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 6, group instance id "(null)", current assignment "", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"{code}
C_5 ASSIGNMENT CHANGES TO T1-P7, T1-P8, T1-P12
{code:java}
[2024-01-16 12:10:51,562] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=6, previousMemberEpoch=0, targetMemberEpoch=6, state=assigning, assignedPartitions={}, partitionsPendingRevocation={}, partitionsPendingAssignment={IKXGrFR1Rv-Qes7Ummas6A=[3, 12]}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager)C_5 RECEIVES TARGET ASSIGNMENT %7|1705403451.565|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"{code}
C_5 ACKS TARGET ASSIGNMENT
{code:java}
%7|1705403451.566|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[7], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[8], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[12]", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]" %7|1705403451.567|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"{code}
C_5 SUBSCRIBES TO T1,T2: T1 partitions are revoked, 5 T2 partitions are pending
{code:java}
%7|1705403452.612|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]" [2024-01-16 12:10:52,615] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager) [2024-01-16 12:10:52,616] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager) %7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment ""{code}
C_5 FINISHES REVOCATION
{code:java}
%7|1705403452.618|CGRPJOINSTATE|C_5#consumer-8| [thrd:main]: Group "rdkafkatest_rnd53b4eb0c2de343_0113u" changed join state wait-assign-call -> steady (state up)C_5 ACKS REVOCATION, RECEIVES T2-P0,T2-P1,T2-P2 %7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "", subscribe topics "NULL" [2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager) %7|1705403452.620|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]" %7|1705403452.621|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 16, group instance id "NULL", current assignment "rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[0], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[1], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[2]", subscribe topics "NULL" %7|1705403452.622|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]"{code}
LATER C_6 SUBSCRIBES TO T2,T1, IT RECEIVES T1-P9,T1-P13,T1-P15 AND T2-P0. T2-P0 is
{code:java}
assigned without being revoked from C_5.
%7|1705403453.612|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "ss189cxiQ4q_cyNB1aNrfA", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]" [2024-01-16 12:10:53,612] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager) [2024-01-16 12:10:53,613] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Bumped group epoch to 17. (org.apache.kafka.coordinator.group.GroupMetadataManager) [2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Computed a new target assignment for epoch 17 with 'uniform' assignor: {SWlBlUvBQpqdl93hD6SJOA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[2, 4, 5]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), RaTCu6RXQH-FiSl95iZzdw=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[1, 2, 8, 9, 10]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), mhzGxxF2R-Oa3BQGotzx7A=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), i7qqdVw4S0KZR5J5Z0XvoQ=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[1, 3, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), d6cbfWsfTt-7XdYU23MNaw=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[10, 11, 14]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), ss189cxiQ4q_cyNB1aNrfA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), 2vIQ0F6NRlOd9RgnVKtuDg=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[0, 6, 9, 12]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), pOvUx45IT-CJDvBQlfvVbQ=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[11, 12, 13, 14, 15]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0]))}. (org.apache.kafka.coordinator.group.GroupMetadataManager) [2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=9, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[13, 15]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=17, previousMemberEpoch=14, targetMemberEpoch=17, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager) [0m%7|1705403453.616|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[13], (null)(IKXGrFR1Rv+Qes7Ummas6A)[15], (null)(EnZMikZURKiUoxZf0rozaA)[0]"{code}
I also see in consecutive broker logs that the same partition T2-P0, but also T2-P1 and T2-p2, is assigned to C_5 (RaTCu6RXQH-FiSl95iZzdw) and pending revocation from a third one (member id mhzGxxF2R-Oa3BQGotzx7A)
{code:java}
[2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager) [2024-01-16 12:10:52,620] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member mhzGxxF2R-Oa3BQGotzx7A transitioned from CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=15, state=stable, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 3, 4, 5, 6, 7]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=16, state=revoking, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, partitionsPendingRevocation={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager){code}
> Partition is assigned to two members at the same time
> -----------------------------------------------------
>
> Key: KAFKA-16147
> URL: https://issues.apache.org/jira/browse/KAFKA-16147
> Project: Kafka
> Issue Type: Sub-task
> Reporter: Emanuele Sabellico
> Priority: Major
>
> While running test 0113 of librdkafka, subtest _u_multiple_subscription_changes_ have received this error saying that a partition is assigned to two members at the same time.
> {code:java}
> Error: C_6#consumer-9 is assigned rdkafkatest_rnd550f20623daba04c_0113u_2 [0] which is already assigned to consumer C_5#consumer-8 {code}
> I've reconstructed this sequence:
> C_5 SUBSCRIBES TO T1
> {noformat}
> %7|1705403451.561|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 6, group instance id "(null)", current assignment "", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"{noformat}
>
> C_5 ASSIGNMENT CHANGES TO T1-P7, T1-P8, T1-P12
> [2024-01-16 12:10:51,562] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=6, previousMemberEpoch=0, targetMemberEpoch=6, state=assigning, assignedPartitions={}, partitionsPendingRevocation={}, partitionsPendingAssignment=\{IKXGrFR1Rv-Qes7Ummas6A=[3, 12]}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions=\{IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
> C_5 RECEIVES TARGET ASSIGNMENT
> %7|1705403451.565|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"
> C_5 ACKS TARGET ASSIGNMENT
> {code:java}
> %7|1705403451.566|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[7], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[8], rdkafkatest_rnd5a91902462d61c2e_0113u_1(IKXGrFR1Rv+Qes7Ummas6A)[12]", subscribe topics "rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
> %7|1705403451.567|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[7], (null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[12]"{code}
> C_5 SUBSCRIBES TO T1,T2: T1 partitions are revoked, 5 T2 partitions are pending
> {code:java}
> %7|1705403452.612|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
> [2024-01-16 12:10:52,615] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [2024-01-16 12:10:52,616] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
> %7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment ""{code}
> C_5 FINISHES REVOCATION
> {code:java}
> %7|1705403452.618|CGRPJOINSTATE|C_5#consumer-8| [thrd:main]: Group "rdkafkatest_rnd53b4eb0c2de343_0113u" changed join state wait-assign-call -> steady (state up){code}
> C_5 ACKS REVOCATION, RECEIVES T2-P0,T2-P1,T2-P2
> %7|1705403452.618|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "", subscribe topics "NULL"
> [2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation=\{IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment=\{EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions=\{EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment=\{EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
> %7|1705403452.620|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]"
> %7|1705403452.621|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "RaTCu6RXQH-FiSl95iZzdw", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 16, group instance id "NULL", current assignment "rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[0], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[1], rdkafkatest_rnd550f20623daba04c_0113u_2(EnZMikZURKiUoxZf0rozaA)[2]", subscribe topics "NULL"
> %7|1705403452.622|HEARTBEAT|C_5#consumer-8| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(EnZMikZURKiUoxZf0rozaA)[0], (null)(EnZMikZURKiUoxZf0rozaA)[1], (null)(EnZMikZURKiUoxZf0rozaA)[2]"
> LATER C_6 SUBSCRIBES TO T2,T1, IT RECEIVES T1-P9,T1-P13,T1-P15 AND T2-P0. T2-P0 is assigned without being revoked from C_5.
> {code:java}
> %7|1705403453.612|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat of member id "ss189cxiQ4q_cyNB1aNrfA", group id "rdkafkatest_rnd53b4eb0c2de343_0113u", generation id 14, group instance id "NULL", current assignment "NULL", subscribe topics "rdkafkatest_rnd550f20623daba04c_0113u_2((null))[-1], rdkafkatest_rnd5a91902462d61c2e_0113u_1((null))[-1]"
> [2024-01-16 12:10:53,612] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA updated its subscribed topics to: [rdkafkatest_rnd550f20623daba04c_0113u_2, rdkafkatest_rnd5a91902462d61c2e_0113u_1]. (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [2024-01-16 12:10:53,613] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Bumped group epoch to 17. (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Computed a new target assignment for epoch 17 with 'uniform' assignor: {SWlBlUvBQpqdl93hD6SJOA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[2, 4, 5]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), RaTCu6RXQH-FiSl95iZzdw=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[1, 2, 8, 9, 10]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), mhzGxxF2R-Oa3BQGotzx7A=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), i7qqdVw4S0KZR5J5Z0XvoQ=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[1, 3, 7]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), d6cbfWsfTt-7XdYU23MNaw=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[10, 11, 14]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), ss189cxiQ4q_cyNB1aNrfA=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), 2vIQ0F6NRlOd9RgnVKtuDg=Assignment(error=0, partitions={IKXGrFR1Rv-Qes7Ummas6A=[0, 6, 9, 12]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0])), pOvUx45IT-CJDvBQlfvVbQ=Assignment(error=0, partitions={EnZMikZURKiUoxZf0rozaA=[11, 12, 13, 14, 15]}, metadata=VersionedMetadata(version=0, metadata=java.nio.HeapByteBuffer[pos=0 lim=0 cap=0]))}. (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [2024-01-16 12:10:53,614] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member ss189cxiQ4q_cyNB1aNrfA transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=9, targetMemberEpoch=14, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[13, 15]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=17, previousMemberEpoch=14, targetMemberEpoch=17, state=stable, assignedPartitions={IKXGrFR1Rv-Qes7Ummas6A=[8, 13, 15], EnZMikZURKiUoxZf0rozaA=[0]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [0m%7|1705403453.616|HEARTBEAT|C_6#consumer-9| [thrd:main]: GroupCoordinator/1: Heartbeat response received target assignment "(null)(IKXGrFR1Rv+Qes7Ummas6A)[8], (null)(IKXGrFR1Rv+Qes7Ummas6A)[13], (null)(IKXGrFR1Rv+Qes7Ummas6A)[15], (null)(EnZMikZURKiUoxZf0rozaA)[0]"{code}
> I also see in consecutive broker logs that the same partition T2-P0, but also T2-P1 and T2-p2, is assigned to C_5 (RaTCu6RXQH-FiSl95iZzdw) and pending revocation from a third one (member id mhzGxxF2R-Oa3BQGotzx7A)
> {code:java}
> [2024-01-16 12:10:52,618] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member RaTCu6RXQH-FiSl95iZzdw transitioned from CurrentAssignment(memberEpoch=14, previousMemberEpoch=6, targetMemberEpoch=16, state=revoking, assignedPartitions={}, partitionsPendingRevocation={IKXGrFR1Rv-Qes7Ummas6A=[7, 8, 12]}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 8, 9]}) to CurrentAssignment(memberEpoch=16, previousMemberEpoch=14, targetMemberEpoch=16, state=assigning, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingRevocation={}, partitionsPendingAssignment={EnZMikZURKiUoxZf0rozaA=[8, 9]}). (org.apache.kafka.coordinator.group.GroupMetadataManager)
> [2024-01-16 12:10:52,620] INFO [GroupCoordinator id=1 topic=__consumer_offsets partition=7] [GroupId rdkafkatest_rnd53b4eb0c2de343_0113u] Member mhzGxxF2R-Oa3BQGotzx7A transitioned from CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=15, state=stable, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[0, 1, 2, 3, 4, 5, 6, 7]}, partitionsPendingRevocation={}, partitionsPendingAssignment={}) to CurrentAssignment(memberEpoch=15, previousMemberEpoch=11, targetMemberEpoch=16, state=revoking, assignedPartitions={EnZMikZURKiUoxZf0rozaA=[3, 4, 5, 6, 7]}, partitionsPendingRevocation={EnZMikZURKiUoxZf0rozaA=[0, 1, 2]}, partitionsPendingAssignment={}). (org.apache.kafka.coordinator.group.GroupMetadataManager){code}
>
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