Tomcat-java.net.SocketException: No buffer space available 异常追踪(一)

问题描述：

      当运行org.apache.catalina.startup.Catalina stopServer，停止tomcat程序时，

      严重: Catalina.stop: java.net.SocketException: No buffer space available (maximum connections reached?): connect

      异常栈：

      at java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.PlainSocketImpl.doConnect(Unknown Source)at java.net.PlainSocketImpl.connectToAddress(Unknown Source)at java.net.PlainSocketImpl.connect(Unknown Source)at java.net.SocksSocketImpl.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.<init>(Unknown Source)at java.net.Socket.<init>(Unknown Source)at org.apache.catalina.startup.Catalina.stopServer(Catalina.java:421)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.apache.catalina.startup.Bootstrap.stopServer(Bootstrap.java:337)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:415)

      然后，org.apache.catalina.connector.Connector pause

      严重: Protocol handler pause failed java.net.SocketException: No buffer space available (maximum connections reached?): connect

      at java.net.PlainSocketImpl.socketConnect(Native Method)at java.net.PlainSocketImpl.doConnect(Unknown Source)at java.net.PlainSocketImpl.connectToAddress(Unknown Source)at java.net.PlainSocketImpl.connect(Unknown Source)at java.net.SocksSocketImpl.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.<init>(Unknown Source)at java.net.Socket.<init>(Unknown Source)at org.apache.jk.common.ChannelSocket.unLockSocket(ChannelSocket.java:486)at org.apache.jk.common.ChannelSocket.pause(ChannelSocket.java:283)at org.apache.jk.server.JkMain.pause(JkMain.java:681)at org.apache.jk.server.JkCoyoteHandler.pause(JkCoyoteHandler.java:153)at org.apache.catalina.connector.Connector.pause(Connector.java:1073)at org.apache.catalina.core.StandardService.stop(StandardService.java:563)at org.apache.catalina.core.StandardServer.stop(StandardServer.java:744)at org.apache.catalina.startup.Catalina.stop(Catalina.java:628)at org.apache.catalina.startup.Catalina$CatalinaShutdownHook.run(Catalina.java:671)

 

重启Tomcat也没用。网上搜了一大圈，大概意思就是Socket没有释放、一些TCP出于TIME_WAIT状态。于是，我重启服务器，然后正常运行下，使用netstat观察，果然没有TIME_WAIT：

 

于是，将继续观察，假如出了问题，备查出问题端口，再行分析。

待续...