Kafka rest proxy publish request resulting in Java OOM Exception

[SJ]

Hi confluent community

When i am using below curl request
curl -X POST -H "Content-Type: application/vnd.kafka.json.v2+json"       -H "Accept: application/vnd.kafka.v2+json"       --data '{"records":[{"value":{"foo":"bar"}}]}' "http://ansible-centos-1:8082/topics/k2data"

It results into below error

{"offsets":[{"partition":null,"offset":null,"error_code":50003,"error":"Failed to update metadata after 60000 ms."}],"key_schema_id":null,"value_schema_id":null}

When checked the logs of kafka rest proxy

org.eclipse.jetty.http.HttpParser$IllegalCharacterException: Illegal character 0x0

        at org.eclipse.jetty.http.HttpParser.next(HttpParser.java:398)

        at org.eclipse.jetty.http.HttpParser.quickStart(HttpParser.java:436)

        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:1216)

        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:250)

        at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)

        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)

        at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)

        at java.lang.Thread.run(Thread.java:748)

[2017-11-23 06:15:40,525] ERROR Uncaught exception in kafka-producer-network-thread | producer-2:  (org.apache.kafka.common.utils.KafkaThread:43)

java.lang.OutOfMemoryError: Java heap space

        at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57)

        at java.nio.ByteBuffer.allocate(ByteBuffer.java:335)

        at org.apache.kafka.common.network.NetworkReceive.readFromReadableChannel(NetworkReceive.java:97)

        at org.apache.kafka.common.network.NetworkReceive.readFrom(NetworkReceive.java:75)

        at org.apache.kafka.common.network.KafkaChannel.receive(KafkaChannel.java:203)

        at org.apache.kafka.common.network.KafkaChannel.read(KafkaChannel.java:167)

        at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:381)

        at org.apache.kafka.common.network.Selector.poll(Selector.java:326)

        at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:433)

        at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:224)

        at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:162)

        at java.lang.Thread.run(Thread.java:748)

This error is shown from last few days earlier it was working fine for me.
I have currently kafka cluster of two nodes
First node - 1 zookeeper, 1 kafka server, 1 kafka rest
Second node - 1 kafka server, 1 kafka rest

Early help will be appreciated.

Thanks in advance.