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Posted to issues@flink.apache.org by "Sergey Nuyanzin (JIRA)" <ji...@apache.org> on 2018/05/17 10:52:00 UTC
[jira] [Updated] (FLINK-9349) KafkaConnector Exception while
fetching from multiple kafka topics
[ https://issues.apache.org/jira/browse/FLINK-9349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sergey Nuyanzin updated FLINK-9349:
-----------------------------------
Attachment: Flink9349Test.java
> KafkaConnector Exception while fetching from multiple kafka topics
> -------------------------------------------------------------------
>
> Key: FLINK-9349
> URL: https://issues.apache.org/jira/browse/FLINK-9349
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector
> Affects Versions: 1.4.0
> Reporter: Vishal Santoshi
> Priority: Major
> Attachments: Flink9349Test.java
>
>
> ./flink-connectors/flink-connector-kafka-0.9/src/main/java/org/apache/flink/streaming/connectors/kafka/internal/Kafka09Fetcher.java
>
> It seems the List subscribedPartitionStates was being modified when runFetchLoop iterated the List.
> This can happen if, e.g., FlinkKafkaConsumer runs the following code concurrently:
> kafkaFetcher.addDiscoveredPartitions(discoveredPartitions);
>
> {code:java}
> java.util.ConcurrentModificationException
> at java.util.LinkedList$ListItr.checkForComodification(LinkedList.java:966)
> at java.util.LinkedList$ListItr.next(LinkedList.java:888)
> at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.runFetchLoop(Kafka09Fetcher.java:134)
> {code}
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