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Posted to issues@flink.apache.org by "Piotr Nowojski (JIRA)" <ji...@apache.org> on 2017/10/30 14:11:01 UTC
[jira] [Assigned] (FLINK-7732) Test instability in Kafka end-to-end
test (invalid Kafka offset)
[ https://issues.apache.org/jira/browse/FLINK-7732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Piotr Nowojski reassigned FLINK-7732:
-------------------------------------
Assignee: Piotr Nowojski
> Test instability in Kafka end-to-end test (invalid Kafka offset)
> ----------------------------------------------------------------
>
> Key: FLINK-7732
> URL: https://issues.apache.org/jira/browse/FLINK-7732
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector, Tests
> Affects Versions: 1.4.0
> Reporter: Nico Kruber
> Assignee: Piotr Nowojski
> Priority: Blocker
> Labels: test-stability
> Fix For: 1.4.0
>
>
> In a test run with unrelated changes in the network stack, the Kafa end-to-end test was failing with an invalid offset:
> {code}
> 2017-09-28 06:34:10,736 INFO org.apache.kafka.common.utils.AppInfoParser - Kafka version : 0.10.2.1
> 2017-09-28 06:34:10,744 INFO org.apache.kafka.common.utils.AppInfoParser - Kafka commitId : e89bffd6b2eff799
> 2017-09-28 06:34:14,549 INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - Discovered coordinator testing-gce-f67551b8-8867-41c5-b36e-4196d0f11e30:9092 (id: 2147483647 rack: null) for group myconsumer.
> 2017-09-28 06:34:14,573 INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - Marking the coordinator testing-gce-f67551b8-8867-41c5-b36e-4196d0f11e30:9092 (id: 2147483647 rack: null) dead for group myconsumer
> 2017-09-28 06:34:14,686 INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - Discovered coordinator testing-gce-f67551b8-8867-41c5-b36e-4196d0f11e30:9092 (id: 2147483647 rack: null) for group myconsumer.
> 2017-09-28 06:34:14,687 INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - Marking the coordinator testing-gce-f67551b8-8867-41c5-b36e-4196d0f11e30:9092 (id: 2147483647 rack: null) dead for group myconsumer
> 2017-09-28 06:34:14,792 INFO org.apache.kafka.clients.consumer.internals.AbstractCoordinator - Discovered coordinator testing-gce-f67551b8-8867-41c5-b36e-4196d0f11e30:9092 (id: 2147483647 rack: null) for group myconsumer.
> 2017-09-28 06:34:15,068 INFO org.apache.flink.runtime.state.DefaultOperatorStateBackend - DefaultOperatorStateBackend snapshot (In-Memory Stream Factory, synchronous part) in thread Thread[Async calls on Source: Custom Source -> Map -> Sink: Unnamed (1/1),5,Flink Task Threads] took 948 ms.
> 2017-09-28 06:34:15,164 WARN org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher - Committing offsets to Kafka failed. This does not compromise Flink's checkpoints.
> java.lang.IllegalArgumentException: Invalid offset: -915623761772
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.sendOffsetCommitRequest(ConsumerCoordinator.java:687)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.doCommitOffsetsAsync(ConsumerCoordinator.java:531)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.commitOffsetsAsync(ConsumerCoordinator.java:499)
> at org.apache.kafka.clients.consumer.KafkaConsumer.commitAsync(KafkaConsumer.java:1181)
> at org.apache.flink.streaming.connectors.kafka.internal.KafkaConsumerThread.run(KafkaConsumerThread.java:217)
> 2017-09-28 06:34:15,171 ERROR org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase - Async Kafka commit failed.
> java.lang.IllegalArgumentException: Invalid offset: -915623761772
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.sendOffsetCommitRequest(ConsumerCoordinator.java:687)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.doCommitOffsetsAsync(ConsumerCoordinator.java:531)
> at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.commitOffsetsAsync(ConsumerCoordinator.java:499)
> at org.apache.kafka.clients.consumer.KafkaConsumer.commitAsync(KafkaConsumer.java:1181)
> at org.apache.flink.streaming.connectors.kafka.internal.KafkaConsumerThread.run(KafkaConsumerThread.java:217)
> {code}
> https://travis-ci.org/apache/flink/jobs/280722829
> [~pnowojski] did a first analysis that revealed this:
> In org/apache/flink/streaming/connectors/kafka/internal/Kafka09Fetcher.java:229 this is being sent:
> {{long offsetToCommit = lastProcessedOffset + 1;}}
> {{lastProcessedOffset}} comes from:
> {{org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase#snapshotState}} either lines 741 or 749
> The value that we see is strangely similiar to {{org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel#GROUP_OFFSET}}
> {code}
> /**
> * Magic number that defines the partition should start from its committed group offset in Kafka.
> *
> * <p>This is used as a placeholder so that the actual committed group offset can be evaluated lazily
> * when the partition will actually start to be read by the consumer.
> */
> public static final long GROUP_OFFSET = -915623761773L;
> {code}
> This {{GROUP_OFFSET}} clearly was not intended to be committed, however probably there is some race between this "lazy evaluation" and checkpoints (which trigger committing offsets to kafka).
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