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https://issues.apache.org/jira/browse/FLINK-8741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16376791#comment-16376791
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ASF GitHub Bot commented on FLINK-8741:
---------------------------------------

Github user tzulitai commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5568#discussion_r170578254
  
    --- Diff: test-infra/end-to-end-test/test_streaming_kafka010.sh ---
    @@ -64,18 +65,18 @@ $KAFKA_DIR/bin/kafka-topics.sh --create --zookeeper 
localhost:2181 --replication
     $KAFKA_DIR/bin/kafka-topics.sh --create --zookeeper localhost:2181 
--replication-factor 1 --partitions 1 --topic test-output
     
     # run the Flink job (detached mode)
    -$FLINK_DIR/bin/flink run -d 
build-target/examples/streaming/Kafka010Example.jar \
    +$FLINK_DIR/bin/flink run -d 
$FLINK_DIR/examples/streaming/Kafka010Example.jar \
    --- End diff --
    
    Yes, by default child-first classloading is used.


> KafkaFetcher09/010/011 uses wrong user code classloader
> -------------------------------------------------------
>
>                 Key: FLINK-8741
>                 URL: https://issues.apache.org/jira/browse/FLINK-8741
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 1.5.0, 1.4.1
>            Reporter: Tzu-Li (Gordon) Tai
>            Assignee: Tzu-Li (Gordon) Tai
>            Priority: Blocker
>             Fix For: 1.5.0, 1.4.2
>
>
> This commit 
> https://github.com/apache/flink/commit/0a1ce0060ef3af29b196ab6ad58f97e49a40a4cf#diff-51fb939365cf758a89794a2599344702R98
>  caused the wrong classloader to be used.
> The user code classloader should be used directly, not its parent. That 
> change seems to be irrelevant to the issue, and seems to have been changed by 
> accident.



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