The XRDP Bug after restart the service

I have installed the XRDP on CentOS for Hadoop Java development. And the Eclipse on CentOS require the RDP to Gnume Desktop for GUI. However, I need all the connection to the same session to work on latest progress. So I added up the static port as session config like below:

[xrdp2]
name=sesman-Xvnc-5910
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=5910

However, after I restarted the machine. The sesman session shows error on connection. After several try I found the XRDP require an initial session when you try to identify the port of session. Which means when there is no 5910 session on XRDP Service. The above connection will get error. We have to left the config like:

[xrdp1]
name=sesman-Xvnc-New
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=-1

This config will start up the first session at port 5910 (Default). Then you can successfully identify the session port 5910 as [xrdp2] assigned and get into the session you left after service restart.

There is a way to get your desktop session on localhost:
[xrdp0]
name=sesman-Xvnc-Local
lib=libvnc.so
username=ask
password=ask
ip=127.0.0.1
port=5900

Before restart xrdp, you should change the setting [System]->[Preference]->[Remote Desktop] to open the value of [Allow other User to control your desktop]. The xrdp0 will show the local desktop you have directly work on.