wanghangyu817 opened a new pull request #346:
URL: https://github.com/apache/flume/pull/346
When using memory-channel, the header is retrieved from sink and the
metadata information of Kafka is retrieved from it, but when using
kafka-channel, it is not retrieved
` System.out.println("***************************");
Map<String, String> headers = event.getHeaders();
String rain = headers.get("rain");
String topic = headers.get("topic");
String key = headers.get("key");
String offset = headers.get("offset");
System.out.println("rain = " + rain);
System.out.println("topic = " + topic);
System.out.println("key = " + key);
System.out.println("offset = " + offset);
System.out.println("***************************");`
In the above code, the printed value is empty, so this solves the problem
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