stack trace

java.lang.AssertionError: Expected current thread [Thread[elasticsearch[Stakar][transport_client_worker][T#5]{New I/O worker #5},5,main]] to not be a transport thread. Reason: 
	at org.elasticsearch.transport.Transports.assertNotTransportThread(Transports.java:57)
	at org.elasticsearch.common.util.concurrent.BaseFuture.get(BaseFuture.java:117)
	at org.elasticsearch.action.support.AdapterActionFuture.actionGet(AdapterActionFuture.java:45)
	at org.elasticsearch.action.support.AbstractListenableActionFuture.executeListener(AbstractListenableActionFuture.java:120)
	at org.elasticsearch.action.support.AbstractListenableActionFuture.done(AbstractListenableActionFuture.java:97)
	at org.elasticsearch.common.util.concurrent.BaseFuture.set(BaseFuture.java:167)
	at org.elasticsearch.action.support.AdapterActionFuture.onResponse(AdapterActionFuture.java:96)
	at org.elasticsearch.client.transport.TransportClientNodesService$RetryListener.onResponse(TransportClientNodesService.java:227)
	at org.elasticsearch.action.TransportActionNodeProxy$1.handleResponse(TransportActionNodeProxy.java:73)
	at org.elasticsearch.action.TransportActionNodeProxy$1.handleResponse(TransportActionNodeProxy.java:57)
	at org.elasticsearch.transport.netty.MessageChannelHandler.handleResponse(MessageChannelHandler.java:163)
	at org.elasticsearch.transport.netty.MessageChannelHandler.messageReceived(MessageChannelHandler.java:132)
	at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
	at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:296)
	at org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)
	at org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443)
	at org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303)
	at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
	at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
	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:88)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.elasticsearch.common.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	at org.elasticsearch.common.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
	at org.elasticsearch.common.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
	at org.elasticsearch.common.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)