NPE in NetworkClient

[2017-09-21 23:07:09,072] ERROR [kafka-producer-network-thread | xxx] [Producer clientId=xxx] Uncaught error in request completion: (org.apache.kafka.clients.NetworkClient)
java.lang.NullPointerException
        at org.apache.kafka.clients.producer.internals.Sender.canRetry(Sender.java:639)
        at org.apache.kafka.clients.producer.internals.Sender.completeBatch(Sender.java:522)
        at org.apache.kafka.clients.producer.internals.Sender.handleProduceResponse(Sender.java:473)
        at org.apache.kafka.clients.producer.internals.Sender.access$100(Sender.java:76)
        at org.apache.kafka.clients.producer.internals.Sender$1.onComplete(Sender.java:693)
        at org.apache.kafka.clients.ClientResponse.onComplete(ClientResponse.java:101)
        at org.apache.kafka.clients.NetworkClient.completeResponses(NetworkClient.java:481)
        at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:453)
        at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:241)
        at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:166)
        at java.lang.Thread.run(Thread.java:748)