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java.util.concurrent.RejectedExecutionException: Worker has already been shutdown	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.registerTask(AbstractNioSelector.java:120)	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.executeInIoThread(AbstractNioWorker.java:72)	at org.jboss.netty.channel.socket.nio.NioWorker.executeInIoThread(NioWorker.java:36)	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.executeInIoThread(AbstractNioWorker.java:56)	at org.jboss.netty.channel.socket.nio.NioWorker.executeInIoThread(NioWorker.java:36)	at org.jboss.netty.channel.socket.nio.AbstractNioChannelSink.execute(AbstractNioChannelSink.java:34)	at org.jboss.netty.channel.DefaultChannelPipeline.execute(DefaultChannelPipeline.java:636)	at org.jboss.netty.channel.Channels.fireExceptionCaughtLater(Channels.java:496)	at org.jboss.netty.channel.AbstractChannelSink.exceptionCaught(AbstractChannelSink.java:46)	at org.jboss.netty.channel.DefaultChannelPipeline.notifyHandlerException(DefaultChannelPipeline.java:658)	at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:577)	at org.jboss.netty.channel.Channels.write(Channels.java:704)	at org.jboss.netty.channel.Channels.write(Channels.java:671)	at org.jboss.netty.channel.AbstractChannel.write(AbstractChannel.java:348)	at org.elasticsearch.transport.netty.NettyTransportChannel.sendResponse(NettyTransportChannel.java:103)	at org.elasticsearch.transport.netty.NettyTransportChannel.sendResponse(NettyTransportChannel.java:75)	at org.elasticsearch.transport.DelegatingTransportChannel.sendResponse(DelegatingTransportChannel.java:58)	at org.elasticsearch.transport.RequestHandlerRegistry$TransportChannelWrapper.sendResponse(RequestHandlerRegistry.java:134)	at org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:369)	at org.elasticsearch.search.action.SearchServiceTransportAction$SearchQueryTransportHandler.messageReceived(SearchServiceTransportAction.java:365)	at org.elasticsearch.transport.TransportRequestHandler.messageReceived(TransportRequestHandler.java:33)	at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:75)	at org.elasticsearch.transport.netty.MessageChannelHandler$RequestHandler.doRun(MessageChannelHandler.java:300)	at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)	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)