MATLAB Answers

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

128 views (last 30 days)
Esther
Esther on 30 Nov 2015
Commented: 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.

Accepted Answer

Dave Behera
Dave Behera on 4 Dec 2015
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

Dominik Melcher
Dominik Melcher on 14 Sep 2016
I solved the problem by deleting the MATLAB_JAVA path in my system variables.

Sign in to comment.

More Answers (2)

AFTAB ALAM  ANSARI
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

Eric Zhai
Eric Zhai on 22 Jan 2019
This answer really helps me. After I exclude MATLAB from the firewall in the computer, the error never come up.

Sign in to comment.


Hicham Belh
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.

Sign in to answer this question.