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解决:Maximum number of threads (200) created for connector with address null and p

 
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转至:http://xy123110.iteye.com/blog/1551544

 

1、INFO: Maximum number of threads (200) created for connector with address null and port 8091

说明:最大线程数错误

解决方案:

 

使用线程池,用较少的线程处理较多的访问,可以提高tomcat处理请求的能力。使用方式:

首先。打开/conf/server.xml,增加

 

  1. <Executor name="tomcatThreadPool" namePrefix="catalina-exec-"      
  2.         maxThreads="500" minSpareThreads="20" maxIdleTime="60000" />    


最大线程500(一般服务器足以),最小空闲线程数20,线程最大空闲时间60秒。

然后,修改<Connector ...>节点,增加executor属性,如:

  1. <Connector executor="tomcatThreadPool"      
  2.                port="80" protocol="HTTP/1.1"      
  3.                connectionTimeout="60000"    
  4.                keepAliveTimeout="15000"    
  5.                maxKeepAliveRequests="1"    
  6.                redirectPort="443"    
  7.                ....../>    


2、java.net.SocketException: Too many open files

 

当tomcat并发用户量大的时候,单个jvm进程确实可能打开过多的文件句柄。

使用 #lsof -p 10001|wc -l   查看文件操作数

如下操作:

  1. (1).ps -ef |grep tomcat  查看tomcat的进程ID,记录ID号,假设进程ID为10001     
  2. (2).lsof -p 10001|wc -l    查看当前进程id为10001的 文件操作数     
  3. (3).使用命令:ulimit -a   查看每个用户允许打开的最大文件数     
  4.   默认是1024.     
  5. (4).然后执行:ulimit -n 65536 将允许的最大文件数调整为65536    
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