[jira] [Created] (KAFKA-6728) Kafka Connect Header Null Pointer Exception

["Philippe Hong (JIRA)" <ji...@apache.org>]

Philippe Hong created KAFKA-6728:
------------------------------------

             Summary: Kafka Connect Header Null Pointer Exception
                 Key: KAFKA-6728
                 URL: https://issues.apache.org/jira/browse/KAFKA-6728
             Project: Kafka
          Issue Type: Bug
          Components: KafkaConnect
    Affects Versions: 1.1.0
         Environment: Linux Mint
            Reporter: Philippe Hong


I am trying to use the newly released Kafka Connect that supports headers by using the standalone connector to write to a text file (so in this case I am only using the sink component)

I am sadly greeted by a NullPointerException :

{{{noformat} }}
{{ERROR WorkerSinkTask\{id=local-file-sink-0} Task threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:172)}}
{{java.lang.NullPointerException}}
{{    at org.apache.kafka.connect.runtime.WorkerSinkTask.convertHeadersFor(WorkerSinkTask.java:501)}}
{{    at org.apache.kafka.connect.runtime.WorkerSinkTask.convertMessages(WorkerSinkTask.java:469)}}
{{    at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:301)}}
{{    at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:205)}}
{{    at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:173)}}
{{    at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:170)}}
{{    at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:214)}}
{{    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)}}
{{    at java.util.concurrent.FutureTask.run(FutureTask.java:266)}}
{{    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)}}
{{    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)}}
{{    at java.lang.Thread.run(Thread.java:748)}}
{{{noformat}}}

I launched zookeeper and kafka 1.1.0 locally and sent a ProducerRecord[String, Array[Byte]] using a KafkaProducer[String, Array[Byte]] with a header with a key and value.

I can read the record with a console consumer as well as using a KafkaConsumer (where in this case I can see the content of the header of the message I sent previously) so no problem here.

I only made two changes to the kafka configuration:
    - I used the StringConverter for the key and the ByteArrayConverter for the value. 
    - I also changed the topic where the sink would connect to.

If I forgot something please tell me so as it is the first time I am creating an issue on Jira.

{{}}



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