java.lang.OutOfMemoryError: Java heap space

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The heap space allocated to the Cassandra node ran out due to high load and low memory allocation. The surefire solution is to increase the amount of RAM given to the Cassandra process (determined by the launcher script and the total memory in the system).

java.lang.OutOfMemoryError: Java heap space
at java.nio.HeapByteBuffer.(HeapByteBuffer.java:57)
at java.nio.ByteBuffer.allocate(ByteBuffer.java:335)
at kafka.network.BlockingChannel.readCompletely(BlockingChannel.scala:129)
at kafka.network.BlockingChannel.receive(BlockingChannel.scala:120)
at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:99)
at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:83)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SimpleConsumer.scala:132)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:132)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:132)
at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply$mcV$sp(SimpleConsumer.scala:131)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:131)
at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:131)
at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)
at kafka.consumer.SimpleConsumer.fetch(SimpleConsumer.scala:130)
at kafka.consumer.ConsumerFetcherThread.fetch(ConsumerFetcherThread.scala:109)
at kafka.consumer.ConsumerFetcherThread.fetch(ConsumerFetcherThread.scala:29)
at kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:118)
at kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:103)
at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:63)

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