OOM error in ES 0.19.0.RC2

gistfile1.txt

Here is the OOM error from logs;

java.lang.OutOfMemoryError: Java heap space
        at org.elasticsearch.common.compress.lzf.BufferRecycler.allocInputBuffer(BufferRecycler.java:134)
        at org.elasticsearch.common.io.stream.LZFStreamInput.<init>(LZFStreamInput.java:90)
        at org.elasticsearch.common.io.stream.CachedStreamInput.instance(CachedStreamInput.java:48)
        at org.elasticsearch.common.io.stream.CachedStreamInput.cachedHandles(CachedStreamInput.java:66)
        at org.elasticsearch.transport.netty.MessageChannelHandler.process(MessageChannelHandler.java:213)
        at org.elasticsearch.transport.netty.MessageChannelHandler.callDecode(MessageChannelHandler.java:141)
        at org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:95)
        at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75)
        at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:558)
        at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:553)
        at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:268)
        at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:255)
        at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.read(NioWorker.java:343)
        at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:274)
        at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.run(NioWorker.java:194)
        at org.elasticsearch.common.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102)
        at org.elasticsearch.common.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:662)