elaticsearch TransportClient首次获取连接比较慢的原因及解决方案

在javaweb程序服务器启动后，首次从es查询数据时获取TransportClient都会比较久，后面查询重新获取TransportClient会相对快点，不知道具体是什么原因造成的，如果各位大侠有解决过相同的问题麻烦分享下问题原因及解决方案，非常感谢。

获取TransportClient代码如下：

public static Client getClient() throws UnknownHostException {
    Client client = null;
    try {        

        if (StringUtils.isEmpty(ip)) {
            ip = def_ip;
        }

        if (port == 0) {
            port = def_port;
        }

        client = TransportClient.builder().build().addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName(ip), port));

    }
    catch (Exception e) {
        e.printStackTrace();
    }

    return client;
}

vi /etc/profile
source /etc/profile

Java -version

Vi server.xml


vi /etc/sysconfig/iptables
/etc/init.d/iptables restart


linux tomcat shutdown命令杀不死进程问题
解决方案三：
  基本原理为启动tomcat时记录启动tomcat的进程id(pid),关闭时强制杀死该进程

第一步 ：vim修改tomcat下bin/catalina.sh文件，添加点东西，主要是记录tomcat的pid,如下:
#设置记录CATALINA_PID。

#该设置会在启动时候bin下新建一个CATALINA_PID文件

#关闭时候从CATALINA_PID文件找到pid，kill。。。同时删除CATALINA_PID文件

if [ -z "$CATALINA_PID" ]; then

  CATALINA_PID=$PRGDIR/CATALINA_PID

Fi

第二步 vim tomcat的shutdown.sh文件,在最后一行加上-force:

修改jar包日志

jar cvf elasticsearch-2.4.0.jar config META-INF org es-build.properties

导出war包
<?xml version="1.0" encoding="UTF-8"?>

<target name="clean" description="delete dist directory">
    <delete dir="${classes}" />
    <delete dir="${rel.dir}" />
</target>

<target name="compile" depends="clean" description="create ${classes} path, compile source and put binary file in ${classes} path">
    <mkdir dir="${classes}" />
    <javac destdir="${classes}" target="1.7" debug="true" deprecation="false" optimize="false" 
        failonerror="true" encoding="UTF-8">
        <src path="${src.dir}" />
        <classpath refid="lib_classpath" />
    </javac>
</target>

<target name="copyXml" description="put configuration in the ${classes} path">
    <copy todir="${classes}">
        <fileset dir="${src.dir}">
            <include name="**/*.xml" />
        </fileset>
    </copy>
</target>
<!--
<target name="copyMetaInf" description="put meta-inf context.xml in the ${dist} path">
    <copy todir="${dist}/META-INF">
        <fileset dir="WebContent/META-INF">
            <include name="context.xml" /> 
        </fileset>
    </copy>
</target>
-->

<target name="copyProperties" description="put properties in the ${dist} path">
    <copy todir="${classes}">
        <fileset dir="${src.dir}">
            <include name="**/*.properties" />
        </fileset>
    </copy>
</target>

<target name="war" depends="compile,copyXml" description="generate war" >
    <war destfile="${dist}/${project.name}.war" webxml="WebContent/WEB-INF/web.xml" duplicate="preserve"> 
        <fileset dir="WebContent">
            <!--exclude name="WEB-INF/lib/*.jar" /-->
            <exclude name="WEB-INF/web.xml" />
            <!--exclude name="META-INF/*" /-->
        </fileset>
        <lib dir="${build.lib.dir}">
        </lib>
        <classes dir="${classes}"/>
    </war>
    <mkdir dir="${rel.dir}" />
    <copy file="${dist}/${project.name}.war" todir="${rel.dir}"/>

</target>