Luke Chen created KAFKA-16162:
---------------------------------
Summary: New created topics are unavailable after upgrading to 3.7
Key: KAFKA-16162
URL: https://issues.apache.org/jira/browse/KAFKA-16162
Project: Kafka
Issue Type: Bug
Reporter: Luke Chen
In 3.7, we introduced the KIP-858 JBOD feature, and the brokerRegistration
request will include the `LogDirs` fields with UUID for each log dir in each
broker. This info will be stored in the controller and used to identify if the
log dir is known and online while handling AssignReplicasToDirsRequest
[here|https://github.com/apache/kafka/blob/trunk/metadata/src/main/java/org/apache/kafka/controller/ReplicationControlManager.java#L2093].
While upgrading from old version, the kafka cluster will run in 3.7 binary with
old metadata version, and then upgrade to newer version using
kafka-features.sh. That means, while brokers startup and send the
brokerRegistration request, it'll be using older metadata version without
`LogDirs` fields included. And it makes the controller has no log dir info for
all brokers. Later, after upgraded, if new topic is created, the flow will go
like this:
1. Controller assign replicas and adds in metadata log
2. brokers fetch the metadata and apply it
3. ReplicaManager#maybeUpdateTopicAssignment will update topic assignment
4. After sending ASSIGN_REPLICAS_TO_DIRS to controller with replica assignment,
controller will think the log dir in current replica is offline, so triggering
offline handler, and reassign replica, and offline, until no more replicas to
assign, so assigning leader to -1 (i.e. no leader)
So, the results will be that new created topics are unavailable (with no
leader) because the controller thinks all log dir are offline.
{code:java}
lukchen@lukchen-mac kafka % bin/kafka-topics.sh --describe --topic
quickstart-events3 --bootstrap-server localhost:9092
Topic: quickstart-events3 TopicId: s8s6tEQyRvmjKI6ctNTgPg PartitionCount:
3 ReplicationFactor: 3 Configs: segment.bytes=1073741824
Topic: quickstart-events3 Partition: 0 Leader: none
Replicas: 7,2,6 Isr: 6
Topic: quickstart-events3 Partition: 1 Leader: none
Replicas: 2,6,7 Isr: 6
Topic: quickstart-events3 Partition: 2 Leader: none
Replicas: 6,7,2 Isr: 6
{code}
The log snippet in the controller :
{code:java}
# handling 1st assignReplicaToDirs request
[2024-01-18 19:34:47,370] DEBUG [QuorumController id=1] Broker 6 assigned
partition quickstart-events3:0 to OFFLINE dir 7K5JBERyyqFFxIXSXYluJA
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,370] DEBUG [QuorumController id=1] Broker 6 assigned
partition quickstart-events3:2 to OFFLINE dir 7K5JBERyyqFFxIXSXYluJA
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,371] DEBUG [QuorumController id=1] Broker 6 assigned
partition quickstart-events3:1 to OFFLINE dir 7K5JBERyyqFFxIXSXYluJA
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] offline-dir-assignment:
changing partition(s): quickstart-events3-0, quickstart-events3-2,
quickstart-events3-1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA] ->
[7K5JBERyyqFFxIXSXYluJA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA],
partitionEpoch: 0 -> 1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[7K5JBERyyqFFxIXSXYluJA,
AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA] ->
[AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA, AAAAAAAAAAAAAAAAAAAAAA],
partitionEpoch: 0 -> 1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[AAAAAAAAAAAAAAAAAAAAAA,
7K5JBERyyqFFxIXSXYluJA, AAAAAAAAAAAAAAAAAAAAAA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA] ->
[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA],
partitionEpoch: 0 -> 1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[AAAAAAAAAAAAAAAAAAAAAA,
AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,372] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [6, 7, 2] ->
[7, 2], leader: 6 -> 7, leaderEpoch: 0 -> 1, partitionEpoch: 1 -> 2
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[7, 2], leader=7, replicas=null, removingReplicas=null,
addingReplicas=null, leaderRecoveryState=-1, directories=null,
eligibleLeaderReplicas=null, lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [2, 6, 7] ->
[2, 7], partitionEpoch: 1 -> 2
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[2, 7], leader=-2, replicas=null, removingReplicas=null,
addingReplicas=null, leaderRecoveryState=-1, directories=null,
eligibleLeaderReplicas=null, lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [7, 2, 6] ->
[7, 2], partitionEpoch: 1 -> 2
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[7, 2], leader=-2, replicas=null, removingReplicas=null,
addingReplicas=null, leaderRecoveryState=-1, directories=null,
eligibleLeaderReplicas=null, lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
# handling 2nd assignReplicaToDirs request
[2024-01-18 19:34:47,373] DEBUG [QuorumController id=1] Broker 7 assigned
partition quickstart-events3:0 to OFFLINE dir 7V9WGfqd-WUS-k61NdrzcQ
(org.apache.kafka.controller.ReplicationControlManager)
!!! dir:AAAAAAAAAAAAAAAAAAAAAA;;;[]
[2024-01-18 19:34:47,374] DEBUG [QuorumController id=1] Broker 7 assigned
partition quickstart-events3:2 to OFFLINE dir 7V9WGfqd-WUS-k61NdrzcQ
(org.apache.kafka.controller.ReplicationControlManager)
!!! dir:AAAAAAAAAAAAAAAAAAAAAA;;;[]
[2024-01-18 19:34:47,374] DEBUG [QuorumController id=1] Broker 7 assigned
partition quickstart-events3:1 to OFFLINE dir 7V9WGfqd-WUS-k61NdrzcQ
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] offline-dir-assignment:
changing partition(s): quickstart-events3-0, quickstart-events3-2,
quickstart-events3-1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[7K5JBERyyqFFxIXSXYluJA, AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA] ->
[7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ, AAAAAAAAAAAAAAAAAAAAAA],
partitionEpoch: 2 -> 3 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[7K5JBERyyqFFxIXSXYluJA,
7V9WGfqd-WUS-k61NdrzcQ, AAAAAAAAAAAAAAAAAAAAAA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA, AAAAAAAAAAAAAAAAAAAAAA] ->
[AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ],
partitionEpoch: 2 -> 3 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[AAAAAAAAAAAAAAAAAAAAAA,
7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA] ->
[7V9WGfqd-WUS-k61NdrzcQ, AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA],
partitionEpoch: 2 -> 3 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[7V9WGfqd-WUS-k61NdrzcQ,
AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [7, 2] -> [2],
leader: 7 -> 2, leaderEpoch: 1 -> 2, partitionEpoch: 3 -> 4
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[2], leader=2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [2, 7] -> [2],
partitionEpoch: 3 -> 4 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[2], leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: isr: [7, 2] -> [2],
leader: 7 -> 2, leaderEpoch: 0 -> 1, partitionEpoch: 3 -> 4
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,375] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=[2], leader=2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
# handling 3rd assignReplicaToDirs request
[2024-01-18 19:34:47,378] DEBUG [QuorumController id=1] Broker 2 assigned
partition quickstart-events3:0 to OFFLINE dir 97WGe1Sf0cWqegCPEUExiw
(org.apache.kafka.controller.ReplicationControlManager)
!!! dir:AAAAAAAAAAAAAAAAAAAAAA;;;[]
[2024-01-18 19:34:47,378] DEBUG [QuorumController id=1] Broker 2 assigned
partition quickstart-events3:2 to OFFLINE dir 97WGe1Sf0cWqegCPEUExiw
(org.apache.kafka.controller.ReplicationControlManager)
!!! dir:AAAAAAAAAAAAAAAAAAAAAA;;;[]
[2024-01-18 19:34:47,378] DEBUG [QuorumController id=1] Broker 2 assigned
partition quickstart-events3:1 to OFFLINE dir 97WGe1Sf0cWqegCPEUExiw
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] offline-dir-assignment:
changing partition(s): quickstart-events3-0, quickstart-events3-2,
quickstart-events3-1 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ, AAAAAAAAAAAAAAAAAAAAAA] ->
[7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ, 97WGe1Sf0cWqegCPEUExiw],
partitionEpoch: 4 -> 5 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[7K5JBERyyqFFxIXSXYluJA,
7V9WGfqd-WUS-k61NdrzcQ, 97WGe1Sf0cWqegCPEUExiw], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ] ->
[97WGe1Sf0cWqegCPEUExiw, 7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ],
partitionEpoch: 4 -> 5 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[97WGe1Sf0cWqegCPEUExiw,
7K5JBERyyqFFxIXSXYluJA, 7V9WGfqd-WUS-k61NdrzcQ], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: directories:
[7V9WGfqd-WUS-k61NdrzcQ, AAAAAAAAAAAAAAAAAAAAAA, 7K5JBERyyqFFxIXSXYluJA] ->
[7V9WGfqd-WUS-k61NdrzcQ, 97WGe1Sf0cWqegCPEUExiw, 7K5JBERyyqFFxIXSXYluJA],
partitionEpoch: 4 -> 5 (org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-2, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=[7V9WGfqd-WUS-k61NdrzcQ,
97WGe1Sf0cWqegCPEUExiw, 7K5JBERyyqFFxIXSXYluJA], eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-0 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: leader: 2 -> -1,
leaderEpoch: 2 -> 3, partitionEpoch: 5 -> 6
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=0, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-1, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-2 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: leader: 2 -> -1,
leaderEpoch: 0 -> 1, partitionEpoch: 5 -> 6
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=2, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-1, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] partition change for
quickstart-events3-1 with topic ID 6ZIeidfiSTWRiOAmGEwn_g: leader: 2 -> -1,
leaderEpoch: 1 -> 2, partitionEpoch: 5 -> 6
(org.apache.kafka.controller.ReplicationControlManager)
[2024-01-18 19:34:47,379] DEBUG [QuorumController id=1] Replayed partition
change PartitionChangeRecord(partitionId=1, topicId=6ZIeidfiSTWRiOAmGEwn_g,
isr=null, leader=-1, replicas=null, removingReplicas=null, addingReplicas=null,
leaderRecoveryState=-1, directories=null, eligibleLeaderReplicas=null,
lastKnownELR=null) for topic quickstart-events3
(org.apache.kafka.controller.ReplicationControlManager)
{code}
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