flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-9349) KafkaConnector Exception while fetching from multiple kafka topics
Date Sun, 13 May 2018 15:11:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-9349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16473520#comment-16473520
] 

Ted Yu commented on FLINK-9349:
-------------------------------

It seems synchronization should be added for adding to subscribedPartitionStates and iterating
subscribedPartitionStates List.

> 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
>
> ./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}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message