Uploaded image for project: 'Kafka'
  1. Kafka
  2. KAFKA-12589

There are insufficient bytes available to read assignment from the sync-group response (actual byte size 0) , this is not expected;

Attach filesAttach ScreenshotVotersWatch issueWatchersCreate sub-taskLinkCloneUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Not A Problem
    • Affects Version/s: 2.6.1
    • Fix Version/s: None
    • Component/s: clients, consumer
    • Labels:
      None
    • Environment:
      OS Windows 10 x64
      Kafka server 2.6.0 / 2.6.1
      Kafka Client 2.5.1 / 2.6.1

      Description

      Hi,
      when i try to subscribe my consumers i get this error :

      java.lang.IllegalStateException: There are insufficient bytes available to read assignment from the sync-group response (actual byte size 0) , this is not expected; it is possible that the leader's assign function is buggy and did not return any assignment for this member, or because static member is configured and the protocol is buggy hence did not get the assignment for this memberjava.lang.IllegalStateException: There are insufficient bytes available to read assignment from the sync-group response (actual byte size 0) , this is not expected; it is possible that the leader's assign function is buggy and did not return any assignment for this member, or because static member is configured and the protocol is buggy hence did not get the assignment for this member at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:367) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:440) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:359) at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:513) at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1268) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1230) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1210)

      I have read the contents of the KAFKA-9801 and KAFKA-10772 bugs but have not found any solutions.
      My scenario scenario is this :
      A . I'm writing a custom ConsumerPartitionAssignor. Very simple for this test.
      B. i tried with the following versions of Kafka:

      • Kafka Server ver 2.6.0 and client 2.5.1
      • Kafka Server ver 2.6.1 and client ver 2.6.1

      Steps :

      1. I create through Spring Boot the topic "TEST_TOPIC" with 5 partitions ( 0-4)
      2. I create a consumer and i subscribe it to TEST_TOPIC for all available partitions. In my ConsumerPartitionAssignor implementation in the method "assign" i have a Cluster data as follow :

      metadata : Cluster(id = H0b9_2PXTdq_cfDZUKKN8w, nodes = [localhost:9092 (id: 0 rack: null)], partitions = [Partition(topic = TEST_TOPIC, partition = 2, leader = 0, replicas = [0], isr = [0], offlineReplicas = []), Partition(topic = TEST_TOPIC, partition = 1, leader = 0, replicas = [0], isr = [0], offlineReplicas = []), Partition(topic = TEST_TOPIC, partition = 4, leader = 0, replicas = [0], isr = [0], offlineReplicas = []), Partition(topic = TEST_TOPIC, partition = 3, leader = 0, replicas = [0], isr = [0], offlineReplicas = []), Partition(topic = TEST_TOPIC, partition = 0, leader = 0, replicas = [0], isr = [0], offlineReplicas = [])],

      3. The assign method returns the follow assignments :
      Assignments {TEST_TOPIC=Assignment(partitions=[TEST_TOPIC-4, TEST_TOPIC-2, TEST_TOPIC-1, TEST_TOPIC-0, TEST_TOPIC-3])}

      Soon after on the client i get :

      [Thread-1] INFO org.apache.kafka.clients.consumer.internals.ConsumerCoordinator - [Consumer clientId=DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2, groupId=TEST-MY-ASSIGNOR] Finished assignment for group at generation 1: {TEST_TOPIC=Assignment(partitions=[TEST_TOPIC-4, TEST_TOPIC-2, TEST_TOPIC-1, TEST_TOPIC-0, TEST_TOPIC-3])} [Thread-1] INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - [Consumer clientId=DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2, groupId=TEST-MY-ASSIGNOR] Successfully synced group in generation Generation{generationId=1, memberId='DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2-0904f76a-67b4-4d21-bb7d-aa342ee830d1', protocol='MYTEST'}

      java.lang.IllegalStateException: There are insufficient bytes available to read assignment from the sync-group response (actual byte size 0) , this is not expected; it is possible that the leader's assign function is buggy and did not return any assignment for this member, or because static member is configured and the protocol is buggy hence did not get the assignment for this memberjava.lang.IllegalStateException: There are insufficient bytes available to read assignment from the sync-group response (actual byte size 0) , this is not expected; it is possible that the leader's assign function is buggy and did not return any assignment for this member, or because static member is configured and the protocol is buggy hence did not get the assignment for this member at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.onJoinComplete(ConsumerCoordinator.java:367) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.joinGroupIfNeeded(AbstractCoordinator.java:451) at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureActiveGroup(AbstractCoordinator.java:367) at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:508) at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1261) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1230) at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1210)

      While on the server :

      [2021-03-31 13:25:46,151] DEBUG [GroupCoordinator 0]: Dynamic member with unknown member id joins group TEST-MY-ASSIGNOR in Empty state. Created a new member id DESKTOP-SV62B3He45a46da-3ede-43d6-9599-aef5698a18a9-f2e02d3f-b79e-4382-91b3-a8c54e90fd49 and request the member to rejoin with this id. (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,159] DEBUG [GroupCoordinator 0]: Dynamic Member with specific member id DESKTOP-SV62B3He45a46da-3ede-43d6-9599-aef5698a18a9-f2e02d3f-b79e-4382-91b3-a8c54e90fd49 joins group TEST-MY-ASSIGNOR in Empty state. Adding to the group now. (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,160] DEBUG Request key MemberKey(DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2-0904f76a-67b4-4d21-bb7d-aa342ee830d1) unblocked 1 Heartbeat operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,168] INFO [GroupCoordinator 0]: Preparing to rebalance group TEST-MY-ASSIGNOR in state PreparingRebalance with old generation 0 (_consumer_offsets-35) (reason: Adding new member DESKTOP-SV62B3He45a46da-3ede-43d6-9599-aef5698a18a9-f2e02d3f-b79e-4382-91b3-a8c54e90fd49 with group instance id None) (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,168] DEBUG Request key GroupKey(TEST-MY-ASSIGNOR) unblocked 0 Rebalance operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,169] INFO [GroupCoordinator 0]: Stabilized group TEST-MY-ASSIGNOR generation 1 (consumer_offsets-35) (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,169] DEBUG Request key MemberKey(DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2-0904f76a-67b4-4d21-bb7d-aa342ee830d1) unblocked 1 Heartbeat operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,388] INFO [GroupCoordinator 0]: Assignment received from leader for group TEST-MY-ASSIGNOR for generation 1 (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,389] WARN [GroupCoordinator 0]: Setting empty assignments for members Set(DESKTOP-SV62B3He45a46da-3ede-43d6-9599-aef5698a18a9-f2e02d3f-b79e-4382-91b3-a8c54e90fd49) of TEST-MY-ASSIGNOR for generation 1 (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,391] DEBUG [Partition __consumer_offsets-35 broker=0] High watermark updated from (offset=0 segment=[0:0]) to (offset=1 segment=[0:421]) (kafka.cluster.Partition) [2021-03-31 13:25:46,392] DEBUG Request key TopicPartitionOperationKey(consumer_offsets,35) unblocked 0 Fetch operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,392] DEBUG Request key TopicPartitionOperationKey(consumer_offsets,35) unblocked 0 Produce operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,392] DEBUG Request key TopicPartitionOperationKey(_consumer_offsets,35) unblocked 0 DeleteRecords operations (kafka.server.DelayedOperationPurgatory) [2021-03-31 13:25:46,392] DEBUG [ReplicaManager broker=0] Produce to local log in 2 ms (kafka.server.ReplicaManager) [2021-03-31 13:25:46,393] WARN [GroupCoordinator 0]: Sending empty assignment to member DESKTOP-SV62B3He45a46da-3ede-43d6-9599-aef5698a18a9-f2e02d3f-b79e-4382-91b3-a8c54e90fd49 of TEST-MY-ASSIGNOR for generation 1 with no errors (kafka.coordinator.group.GroupCoordinator) [2021-03-31 13:25:46,394] DEBUG Request key MemberKey(DESKTOP-SV62B3Hd0ef0cf9-b51c-4659-992e-7eb7f98198a2-0904f76a-67b4-4d21-bb7d-aa342ee830d1) unblocked 1 Heartbeat operations (kafka.server.DelayedOperationPurgatory)

      Is it a bug or am I doing something wrong?

      Thanks.

        Attachments

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              graimondi Guido Raimondi

              Dates

              • Created:
                Updated:
                Resolved:

                Issue deployment