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Posted to dev@flink.apache.org by "Vishal Santoshi (JIRA)" <ji...@apache.org> on 2018/05/13 14:50:00 UTC
[jira] [Created] (FLINK-9349) KafkaConnector Exception while
fetching from multiple kafka topics
Vishal Santoshi created FLINK-9349:
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Summary: 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
./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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