Idea remote debugging

idea Remote debugging debug

Configure remote debugging parameters

Add the generated parameters to the remote host startup script , start-up

-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5555

Start command

java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5555 -jar xxx.jar --spring.profiles.active=test

Turn on remote debugging

The figure below represents that debugging can be started , If not, it may not be connected

Because my breakpoint is in the verification code , Just call this method

If the firewall is turned on by the remote server and the rules are not configured, the connection will fail

sudo vim /etc/sysconfig/iptables   # Open the firewall rule file 
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5005 -j ACCEPT # Configure firewall rules 
sudo systemctl restart iptables  #  Restart and take effect 

Turn off debugging

• It is not safe to open multiple ports on the server , After debugging, the firewall settings can be restored .
• and Java Server on Debug The functions of the server can be preserved , For later debugging .

summary

Remote debugging is not so useful , Can not act as Long term use Debugging tools for . It can only be used as a means of temporary debugging .

There are several difficulties ：
1、 It is difficult to ensure that the local code is consistent with the remote code , And it is difficult to judge whether it is consistent
2、 Through remote debugging, we found bug, But it cannot be repaired immediately and then continue debugging , You can only continue remote debugging after repair and deployment