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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8354) Flink Kafka connector ignores Kafka message headers
Date Mon, 27 Aug 2018 16:29:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8354?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593905#comment-16593905

ASF GitHub Bot commented on FLINK-8354:

yanghua commented on a change in pull request #6615: [FLINK-8354] [flink-connectors] Add ability
to access and provider Kafka headers
URL: https://github.com/apache/flink/pull/6615#discussion_r213034632

 File path: flink-connectors/flink-connector-kafka-base/src/main/java/org/apache/flink/streaming/util/serialization/KeyedDeserializationSchema.java
 @@ -54,4 +55,20 @@
 	 * @return True, if the element signals end of stream, false otherwise.
 	boolean isEndOfStream(T nextElement);
+	/**
+	 * Deserializes the byte message.
+	 *
+	 * @param messageKey the key as a byte array (null if no key has been set).
+	 * @param message The message, as a byte array (null if the message was empty or deleted).
 Review comment:
   missed topic parameter description.

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> Flink Kafka connector ignores Kafka message  headers 
> -----------------------------------------------------
>                 Key: FLINK-8354
>                 URL: https://issues.apache.org/jira/browse/FLINK-8354
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>         Environment: Kafka
> Flink 1.4.0
> flink-connector-kafka-0.11_2.11 
>            Reporter: Mohammad Abareghi
>            Assignee: Aegeaner
>            Priority: Major
>              Labels: pull-request-available
> Kafka has introduced notion of Header for messages in version  https://issues.apache.org/jira/browse/KAFKA-4208.
> But flink-connector-kafka-0.11_2.11 which supports kafka ignores headers when
consuming kafka messages. 
> It would be useful in some scenarios, such as distributed log tracing, to support message
headers to FlinkKafkaConsumer011 and FlinkKafkaProducer011. 

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