java.lang.OutOfMemoryError: Java heap space

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java.lang.OutOfMemoryError: Java heap space
at org.elasticsearch.common.util.BigArrays.newByteArray(BigArrays.java:456)
at org.elasticsearch.common.util.BigArrays.newByteArray(BigArrays.java:466)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:60)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:55)
at org.elasticsearch.common.io.stream.BytesStreamOutput.(BytesStreamOutput.java:45)
at org.elasticsearch.transport.netty.NettyTransportChannel.sendResponse(NettyTransportChannel.java:110)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

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