can't update matlab 2020a

When trying to update matlab 2020a got "Something unexpected occurred" error - log data provided below.

(May 27, 2020 14:21:18) Stopping task MATLAB R2020a Startup Accelerator
(May 27, 2020 14:21:40) Something unexpected occurred.: This is not common.
 To resolve this issue, contact Technical Support.
	at com.mathworks.update_installer.ExceptionHandlerImpl.createUpdateInstallerException(Unknown Source)
	at com.mathworks.update_installer.ExceptionHandlerImpl.processException(Unknown Source)
	at com.mathworks.update_installer.UpdateInstallerService.updateInstallation(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.mathworks.installservicehandler.JsonPassThroughResponseWrapper.getData(JsonPassThroughResponseWrapper.java:24)
	at com.mathworks.installservicehandler.JsonPassThroughResponseWrapper.getData(JsonPassThroughResponseWrapper.java:10)
	at com.mathworks.laisserver.impl.helper.RequestHandler.handleRequest(RequestHandler.java:44)
	at com.mathworks.laisserver.impl.JsonServlet.doPost(JsonServlet.java:27)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:669)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:557)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
	at org.eclipse.jetty.server.Server.handle(Server.java:364)
	at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:488)
	at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:943)
	at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1004)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:861)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
	at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:628)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketTimeoutException: connect timed out
	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
	at java.net.Socket.connect(Socket.java:589)
	at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:666)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
	at sun.net.www.protocol.https.HttpsClient.(HttpsClient.java:264)
	at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1199)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:162)
	at com.mathworks.instutil.URLConnectionFactoryImpl.createURLConnection(URLConnectionFactoryImpl.java:31)
	at com.mathworks.instutil.DownloaderImpl.downloadFile(DownloaderImpl.java:55)
	at com.mathworks.instutil.DownloaderImpl.download(DownloaderImpl.java:42)
	at com.mathworks.install_impl.input.UpdateComponentDownloader.download(Unknown Source)
	at com.mathworks.install_impl.InstallableComponentImpl.download(Unknown Source)
	at com.mathworks.install_impl.ProductInstallerImpl.updateProducts(Unknown Source)
	at com.mathworks.install_impl.InstallerImpl.update(Unknown Source)
	at com.mathworks.install_task.UpdateTask.execute(UpdateTask.java:46)
	at com.mathworks.install_task.AbstractDefaultInstallTask.call(AbstractDefaultInstallTask.java:24)
	... 35 more

(May 27, 2020 14:26:54) Update session complete.

[Image Analyst]

The key line in all that is this:

To resolve this issue, contact Technical Support.

So, I'm sure you did that, and what did they say when you called them? They will usually work tirelessly to get you installed, and can even drive your computer for you, unlike us. Are you sure you shutdown MATLAB when it told you to?

https://matlab.fandom.com/wiki/FAQ#During_installation.2C_the_installer_crashes.2C_hangs.2C_gives_an_error_message.2C_does_not_authenticate_your_license.2C_or_otherwise_does_finish_installing_correctly.

[Nikita Gvardi]

I tired to reach the support, but they only let me to open a request, that noone answered.

I do closed to matlab.

[Star Strider]

I also had problems with R2020a Update 1. What everntually worked for me was to launch the update from MATLAB, close MATLAB, wait 15 minutes, then try the update again.

EDIT —

I did the same approach with Update 2 just now, and had no problems. It is necessary to wait for everything related to MATLAB to shut down before installing the Update. In Windows, use Task Manager and Resource Monitor to be certain those conditions are met.

[Nikita Gvardi]

TY will tri it out

Answer 1

[Yuze Zou]

I had the same problem. Temporarily turn off firewall solves the issue for me.