MySQL "Bind on TCP/IP port: Address already in use"

   最近在已部署MySQL Enterprise Monitor的服务器上新增了MySQL实例，导致MySQL Enterprise Monitor异常宕机了，无法重新启动成功。收到了Bind on TCP/IP port: Address already in use的错误提示。下面是这个问题的解决办法，供大家参考。 1、故障现象 [root@SZAPP03 init.d]# ./mysql-monitor-server start Starting mysql service  [ OK ] 150127 09:57:34 mysqld_safe Logging to '/opt/mysql/enterprise/monitor/mysql/runtime/mysqld.log'. 150127 09:57:35 mysqld_safe Starting mysqld daemon with databases from /opt/mysql/enterprise/monitor/mysql/data/ ./mysql-monitor-server : tomcat  (pid 28303) already running 150127 09:57:42 mysqld_safe mysqld from pid file /opt/mysql/enterprise/monitor/mysql/runtime/mysqld.pid ended 2、故障分析 #查看日志，提示为Bind on TCP/IP port: Address already in use，地址在使用，如下 [root@SZAPP03 init.d]# tail -100 /opt/mysql/enterprise/monitor/mysql/runtime/mysqld.log |grep "ERROR" -A5 2015-01-27 09:57:36 30753 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use 2015-01-27 09:57:36 30753 [ERROR] Do you already have another mysqld server running on port: 13306 ? 2015-01-27 09:57:36 30753 [ERROR] Aborting 2015-01-27 09:57:36 30753 [Note] Binlog end 2015-01-27 09:57:36 30753 [Note] Shutting down plugin 'partition' 2015-01-27 09:57:36 30753 [Note] Shutting down plugin 'ARCHIVE' 2015-01-27 09:57:36 30753 [Note] Shutting down plugin 'BLACKHOLE' 2015-01-27 09:57:36 30753 [Note] Shutting down plugin 'ARCHIVE' 2015-01-27 09:57:36 30753 [Note] Shutting down plugin 'BLACKHOLE' #根据上述错误提示，核查缺省的mysql enterprise monitor 端口号13306，如下，并没有被占用 [root@SZAPP03 init.d]# netstat -nltp|grep mysql tcp        0      0 :::3306                     :::*                        LISTEN      8734/mysqld          tcp        0      0 :::3307                     :::*                        LISTEN      9489/mysqld   

3、故障解决

#故障现象里有一个提示为tomcat  (pid 28303) already running #这个引起了我的注意，于是尝试先kill到tomcat相关进程 [root@SZAPP03 init.d]# ps -ef|grep 28303|grep -v grep mysqlmem 28303 28302  4 Jan20 ?        07:35:03 jsvc.exec -java-home /opt/mysql/enterprise/monitor/java  -user mysqlmem -pidfile /opt/mysql/enterprise/monitor/apache-tomcat/temp/catalina.pid -wait 10 -outfile  /opt/mysql/enterprise/monitor/apache-tomcat/logs/catalina-daemon.out -errfile &1 -classpath  /opt/mysql/enterprise/monitor/apache-tomcat/bin/bootstrap.jar:  /opt/mysql/enterprise/monitor/apache-tomcat/bin/commons-daemon.jar:  /opt/mysql/enterprise/monitor/apache-tomcat/bin/tomcat-juli.jar -Dnop -Xmx768M -Xms768M  -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/opt/mysql/enterprise/monitor/apache-tomcat/temp  -XX:+UseParallelOldGC -XX:MaxPermSize=512M -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager  -Djava.endorsed.dirs= -Dcatalina.base=/opt/mysql/enterprise/monitor/apache-tomcat  -Dcatalina.home=/opt/mysql/enterprise/monitor/apache-tomcat  -Djava.io.tmpdir=/opt/mysql/enterprise/monitor/apache-tomcat/temp org.apache.catalina.startup.Bootstrap [root@SZAPP03 init.d]# kill -9 28303 #再次检查是否有tomcat相关进程存在，逐一kill tomcat相关进程 [root@SZAPP03 init.d]# ps -ef|grep tomcat [root@SZAPP03 init.d]# kill -9 28302 [root@SZAPP03 init.d]# kill -9 30867 # Author : Leshami # Blog   : http://blog.csdn.net/leshami #再次重新启动mysql em，此时启动正常 [root@SZAPP03 init.d]# ./mysql-monitor-server start Starting mysql service  [ OK ] 150127 10:16:08 mysqld_safe Logging to '/opt/mysql/enterprise/monitor/mysql/runtime/mysqld.log'. 150127 10:16:08 mysqld_safe Starting mysqld daemon with databases from /opt/mysql/enterprise/monitor/mysql/data/ Starting tomcat service  [ OK ] #检查mysql em的状态 [root@SZAPP03 init.d]# ./mysql-monitor-server status MySQL Enterprise MySQL is running MySQL Enterprise Tomcat is running #检查mysql 的端口号 [root@SZAPP03 init.d]# netstat -nltp|grep mysql tcp        0      0 :::3306                     :::*                        LISTEN      8734/mysqld          tcp        0      0 :::3307                     :::*                        LISTEN      9489/mysqld          tcp        0      0 :::13306                    :::*                        LISTEN      31584/mysqld