ES报下面的错误。。。

org.elasticsearch.transport.RemoteTransportException: [node-2][44.191.154.21:9300][indices:data/read/search[phase/dfs]]

Caused by: org.elasticsearch.common.util.concurrent.EsRejectedExecutionException: rejected execution of org.elasticsearch.transport.TransportService$7@2adb4375 on EsThreadPoolExecutor[search, queue capacity = 1000, org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor@44cf9074[Running, pool size = 31, active threads = 31, queued tasks = 1000, completed tasks = 147]]

	at org.elasticsearch.common.util.concurrent.EsAbortPolicy.rejectedExecution(EsAbortPolicy.java:50) ~[elasticsearch-5.5.3.jar:5.5.3]

	at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:830) ~[?:1.8.0_171]

	at java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1379) ~[?:1.8.0_171]

	at org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor.doExecute(EsThreadPoolExecutor.java:94) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor.execute(EsThreadPoolExecutor.java:89) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.sendLocalRequest(TransportService.java:640) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.access$000(TransportService.java:74) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService$3.sendRequest(TransportService.java:137) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.sendRequestInternal(TransportService.java:586) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.sendRequest(TransportService.java:519) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.sendChildRequest(TransportService.java:546) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService.sendChildRequest(TransportService.java:537) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.SearchTransportService.sendExecuteDfs(SearchTransportService.java:114) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.SearchDfsQueryThenFetchAsyncAction.executePhaseOnShard(SearchDfsQueryThenFetchAsyncAction.java:52) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.InitialSearchPhase.performPhaseOnShard(InitialSearchPhase.java:147) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.InitialSearchPhase.onShardFailure(InitialSearchPhase.java:102) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.InitialSearchPhase.access$100(InitialSearchPhase.java:47) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.search.InitialSearchPhase$1.onFailure(InitialSearchPhase.java:156) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.action.ActionListenerResponseHandler.handleException(ActionListenerResponseHandler.java:51) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TransportService$ContextRestoreResponseHandler.handleException(TransportService.java:1067) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TcpTransport.lambda$handleException$16(TcpTransport.java:1467) ~[elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.common.util.concurrent.EsExecutors$1.execute(EsExecutors.java:110) [elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TcpTransport.handleException(TcpTransport.java:1465) [elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TcpTransport.handlerResponseError(TcpTransport.java:1457) [elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.TcpTransport.messageReceived(TcpTransport.java:1401) [elasticsearch-5.5.3.jar:5.5.3]

	at org.elasticsearch.transport.netty4.Netty4MessageChannelHandler.channelRead(Netty4MessageChannelHandler.java:74) [transport-netty4-5.5.3.jar:5.5.3]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [netty-codec-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:297) [netty-codec-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:413) [netty-codec-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) [netty-codec-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:544) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:498) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458) [netty-transport-4.1.11.Final.jar:4.1.11.Final]

	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.11.Final.jar:4.1.11.Final]

	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]