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Centos7下启动tomcat很慢原因及解决方案

分类: 文章 • 2024-11-23 15:06:45
  • 阿里云  >  教程中心   >  linux教程  >  Centos7下启动tomcat很慢原因及解决方案  
  • Centos7下启动tomcat很慢原因及解决方案

  • 发布时间：2018-01-19 来源：网络 上传者：用户

    关键字: 解决方案 原因 centos7 启动 Tomcat

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  • 摘要：现象在一次CentOS7系统中安装Tomcat,启动过程很慢,需要几分钟,经过查看日志,发现耗时在这里:是session引起的随机数问题导致的。Tocmat的SessionID是通过SHA1算法计算得到的,计算SessionID的时候必须有一个**。为了提高安全性Tomcat在启动的时候回通过随机生成一个**。INFO:StartingserviceCatalinaSep30,20179:29:55AMorg.apache.catalina.core.StandardEngi
  • 现象

    在一次CentOS 7系统中安装Tomcat,启动过程很慢,需要几分钟,经过查看日志,发现耗时在这里:是session引起的随机数问题导致的。Tocmat的Session ID是通过SHA1算法计算得到的,计算Session ID的时候必须有一个**。为了提高安全性Tomcat在启动的时候回通过随机生成一个**。

     

    INFO: Starting service CatalinaSep 30, 2017 9:29:55 AM org.apache.catalina.core.StandardEngine startInternalINFO: Starting Servlet Engine: Apache Tomcat/7.0.81Sep 30, 2017 9:29:55 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/ROOTSep 30, 2017 9:31:03 AM org.apache.catalina.util.SessionIdGeneratorBase createSecureRandom WARNING: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [67,190] milliseconds.Sep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/ROOT has finished in 67,666 msSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/docsSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/docs has finished in 61 msSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/examplesSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/examples has finished in 334 msSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/host-managerSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/host-manager has finished in 63 msSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/managerSep 30, 2017 9:31:03 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/manager has finished in 47 msSep 30, 2017 9:31:03 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["http-bio-8080"]Sep 30, 2017 9:31:03 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["ajp-bio-8009"]Sep 30, 2017 9:31:03 AM org.apache.catalina.startup.Catalina startINFO: Server startup in 68241 ms

     

    图片看的更清楚:

     

    Centos7下启动tomcat很慢原因及解决方案

     

     

     

    分析结果

     

    主要原因是生成随机数的时候卡住了,导致tomcat启动不了。

     

     

    解决方案 vim $JAVA_HOME/jre/lib/security/java.securitysecurerandom.source=file:/dev/urandom改为securerandom.source=file:/dev/./urandom
    结果

     

    重启tomcat,启动时间由68241ms—>956ms

     

    INFO: Starting Servlet Engine: Apache Tomcat/7.0.81Sep 30, 2017 9:47:22 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/ROOTSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/ROOT has finished in 460 msSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/docsSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/docs has finished in 48 msSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/examplesSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/examples has finished in 292 msSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/host-managerSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/host-manager has finished in 50 msSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deploying web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/managerSep 30, 2017 9:47:23 AM org.apache.catalina.startup.HostConfig deployDirectoryINFO: Deployment of web application directory /usr/tomcat/apache-tomcat-7.0.81/webapps/manager has finished in 46 msSep 30, 2017 9:47:23 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["http-bio-8080"]Sep 30, 2017 9:47:23 AM org.apache.coyote.AbstractProtocol startINFO: Starting ProtocolHandler ["ajp-bio-8009"]Sep 30, 2017 9:47:23 AM org.apache.catalina.startup.Catalina startINFO: Server startup in 956 ms

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