MATLAB Answers

Esther
1

"Error using connector.​ensureServ​iceOn" when clicking "Get Add-Ons"

Asked by Esther
on 30 Nov 2015
Latest activity Commented on by Eric Zhai on 22 Jan 2019
Asking this question in case anyone else has faced the same problem / has found a solution.
Release: R2015b 64 bit, Windows.
When clicking on "Get Add-Ons", this error message pops up on the command window:
Error using connector.ensureServiceOn
Error starting MATLAB Connector. Please check that port 31515 is available.
com.mathworks.jmi.MatlabException: Error starting MATLAB Connector. Please check that port 31515 is available.
at com.mathworks.jmi.NativeMatlab.SendMatlabMessage(Native Method)
at com.mathworks.jmi.NativeMatlab.sendMatlabMessage(NativeMatlab.java:266)
at com.mathworks.jmi.MatlabLooper.sendMatlabMessage(MatlabLooper.java:120)
at com.mathworks.jmi.Matlab.mtFevalConsoleOutput(Matlab.java:1778)
at com.mathworks.jmi.MatlabWorker.feval(MatlabWorker.java:195)
at com.mathworks.jmi.MatlabWorker.feval(MatlabWorker.java:172)
at com.mathworks.addons.ConnectorFactory$1.runOnMatlabThread(ConnectorFactory.java:37)
at com.mathworks.jmi.MatlabWorker$2.run(MatlabWorker.java:79)
at com.mathworks.jmi.NativeMatlab.dispatchMTRequests(NativeMatlab.java:475)
What I've tried:
  • Allowed R2015b.exe in the Firewall for inbound and outbound connections.
  • Allowed TCP port 31515 in the Firewall for inbound and outbound connections.
Still no luck.

  0 Comments

Sign in to comment.

3 Answers

Answer by Dave Behera on 4 Dec 2015
 Accepted Answer

Hi,
The issue is related to the network configuration. One possible workaround is forcing JVM to use IPv4 over IPv6 by setting the java.net.preferIPv4Stack config. The following discussion page provides some relevant discussion:
To work around this issue create a new System Variable named JAVA_TOOL_OPTION, with the value -Djava.net.preferIPv4Stack=true

  3 Comments

This didn't work for me :( Any other solution?
I solved the problem by deleting the MATLAB_JAVA path in my system variables.
I deleted the MATLAB_JAVA variable.Yet no luck.

Sign in to comment.


Answer by AFTAB ALAM ANSARI on 22 Nov 2017

Don't go for rubbish like "it's because of JAVA". This happens when MATLAB is blocked by some firewall that is blocking MATLAB from connecting to Internet. MATLAB uses Internet during Stimulation. Just exclude it from firewall and there you go. There will be no error.

  1 Comment

This answer really helps me. After I exclude MATLAB from the firewall in the computer, the error never come up.

Sign in to comment.


Answer by Hicham Belh on 16 Dec 2018

i got this error by click on getaddon:
Version: Matlab 2018a
error:
Error using connector.internal.doEnsureServiceOn
Error in Connector: Did not start the server. Desired port was: 31515. Last error
was: Server did not respond to initial request: 127.0.0.1:31714
Error in connector.ensureServiceOn
Warning: Issue starting Connector. Please check that port 31415 is available. Did not
start the server. Desired port was: 31515. Last error was: Server did not respond to
initial request: 127.0.0.1:31714
thx for any help
Lega

  0 Comments

Sign in to comment.