was open JVM port inaccessible

1.
management.properties under /usr/IBM/WebSphere/AppServer/java/jre/lib/management
com.sun.management.jmxremote.port=7444

com.sun.management.jmxremote.authenticate=false

com.sun.management .jmxremote.ssl=false 2. Add -Djavax.management.builder.initial=- Dcom.sun.management.jmxremote
to the jvm parameter, remember that there is a space after the equal sign, but it cannot be accessed through JvisualVm after starting the application 1. Check whether the firewall is Intercepted Provides several firewall operations (failure after restart) service iptables status View firewall status service iptables start Open firewall service iptables stop Close firewall service iptables restart Restart firewall 2. View the configuration in /etc/hosts The original configuration is















127.0.0.1 localhost.localdomain localhost4 localhost4.localdomamin4 xxx1
::1 localhost.localdomain localhost6 localhost6.localdomamin6 xxx1
127.0.0.1 localhost
110.23.32.2 xxx1

modified to
127.0.0.1 localhost.localdomain localhost4 localhost4.localdomamin4 localhost
::1 localhost.localdomain localhost6 localhost6.localdomamin6 localhost
#127.0.0.1 localhost
110.23.32.2 xxx1 The

problem is solved, that is, the alias of the first two lines is changed to localhost, which is still the complete cause of the problem, and will be understood later