我有5个集群节点，每个节点都有1个副本。总文档大小为216 M，共853,000个文档。我遇到了非常高的CPU使用率，大约在每小时和每天早上05:00 ~ 09:00之间达到60%〜80%。此服务器上只有elasticsearch。我认为es进程出了问题，但在CPU峰值时间只有很少的服务器请求，甚至没有cron作业。每小时和每天早上05:00 ~ 09:00我不知道elasticsearch发生了什么！！有人帮帮我，告诉我那里发生了什么。谢谢..
$ ./elasticsearch -v
Version: 1.1.1, Build: f1585f0/2014-04-16T14:27:12Z, JVM: 1.7.0_55
$ java -version
java version "1.7.0_55"
Java(TM) SE Runtime Environment (build 1.7.0_55-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.55-b03, mixed mode)
我已经在elasticsearch上安装了插件：HQ、bigdesk、head、kopf和sense。
在CPU峰值期间，es日志如下：
[2014-07-03 08:01:00,045][DEBUG][action.search.type ] [node1] [search][4], node[GJjzCrLvQQ-ZRRoqL13MrQ], [P], s[STARTED]: Failed to execute [org.elasticsearch.action.search.SearchRequest@451f9e7c] lastShard [true]
org.elasticsearch.common.util.concurrent.EsRejectedExecutionException: rejected execution (queue capacity 300) on org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction$4@68ab486b
at org.elasticsearch.common.util.concurrent.EsAbortPolicy.rejectedExecution(EsAbortPolicy.java:62)
at java.util.concurrent.ThreadPoolExecutor.reject(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.execute(Unknown Source)
at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.onFirstPhaseResult(TransportSearchTypeAction.java:293)
at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.onFirstPhaseResult(TransportSearchTypeAction.java:300)
at org.elasticsearch.action.search.type.TransportSearchTypeAction$BaseAsyncAction.start(TransportSearchTypeAction.java:190)
at org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction.doExecute(TransportSearchQueryThenFetchAction.java:59)
at org.elasticsearch.action.search.type.TransportSearchQueryThenFetchAction.doExecute(TransportSearchQueryThenFetchAction.java:49)
at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:63)
at org.elasticsearch.action.search.TransportSearchAction.doExecute(TransportSearchAction.java:108)
at org.elasticsearch.action.search.TransportSearchAction.doExecute(TransportSearchAction.java:43)
at org.elasticsearch.action.support.TransportAction.execute(TransportAction.java:63)
at org.elasticsearch.client.node.NodeClient.execute(NodeClient.java:92)
at org.elasticsearch.client.support.AbstractClient.search(AbstractClient.java:212)
at org.elasticsearch.rest.action.search.RestSearchAction.handleRequest(RestSearchAction.java:98)
at org.elasticsearch.rest.RestController.executeHandler(RestController.java:159)
at org.elasticsearch.rest.RestController.dispatchRequest(RestController.java:142)
at org.elasticsearch.http.HttpServer.internalDispatchRequest(HttpServer.java:121)
at org.elasticsearch.http.HttpServer$Dispatcher.dispatchRequest(HttpServer.java:83)
at org.elasticsearch.http.netty.NettyHttpServerTransport.dispatchRequest(NettyHttpServerTransport.java:291)
at org.elasticsearch.http.netty.HttpRequestHandler.messageReceived(HttpRequestHandler.java:43)
at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.elasticsearch.common.netty.handler.codec.http.HttpChunkAggregator.messageReceived(HttpChunkAggregator.java:145)
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$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.elasticsearch.common.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at org.elasticsearch.common.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:459)
at org.elasticsearch.common.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536)
at org.elasticsearch.common.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)
at org.elasticsearch.common.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.elasticsearch.common.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)
at org.elasticsearch.common.netty.OpenChannelsHandler.handleUpstream(OpenChannelsHandler.java:74)
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:318)
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$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)