Is it possible to write Flume headers to HDFS sink

Question

The text_with_headers serializer (HDFS sink serializer) allows to save the Flume event headers rather than discarding them. The output format consists of the headers, followed by a space, then the body payload. We would like to drop the body and retain the headers only. For the HBase sink, the "RegexHbaseEventSerializer" allows us to transform the events. But I am unable to find such a provision for the HDFS sink.

Answer 1

You can set serializer property to header_and_text, which outputs both the headers and the body.

For example:

agent.sinks.my-hdfs-sink.type = hdfs
agent.sinks.my-hdfs-sink.hdfs.fileType = DataStream
... 
# very important
agent.sinks.my-hdfs-sink.serializer = header_and_text