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[IDV #TVD-517907]: connection refused

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #TVD-517907]: connection refused
  • Date: Mon, 11 Apr 2016 17:03:48 -0600
Karen,

Strange. Second time we have received this question today.

You may have Internet connectivity problem at your local institution.

There are several ports you need open at your institution in order to run the
IDV so that it may connect to different data servers. In general, ports 112,
8080 and 80 are required.

This is especially true for the data accessed from ADDE. You must have
access to port 112.

http://www.unidata.ucar.edu/software/idv/docs/userguide/Systems.html

It could be that companies are clamping down on port 112 access. That is 
my working hypothesis at this point. Contact your system administrator/IT
person about Internet traffic on port 112.

Best,

Unidata IDV Support

> Full Name: Karen Cady-Pereira
> Email Address: address@hidden
> Organization: aer
> Package Version: 5.2 build date:2015-08-26 18:19 UTC
> Operating System: Mac OS X
> Hardware: Java: home: /Applications/IDV_5.2/jre.bundle/Contents/Home/jre 
> version: 1.8.0_45 j3d:1.6.0-pre9-daily-experimental daily
> Description of problem: Connecting to server:adde.ucar.edu
> Connection refused
> 
> Working through first example in user's guide. When I pressed connect
> I got the message above.
> 
> ******************
> Stack trace:
> java.net.ConnectException: Connection refused
> at java.net.PlainSocketImpl.socketConnect(Native Method)
> at 
> java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
> at 
> java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
> at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
> at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
> at java.net.Socket.connect(Socket.java:589)
> at java.net.Socket.connect(Socket.java:538)
> at java.net.Socket.<init>(Socket.java:434)
> at java.net.Socket.<init>(Socket.java:211)
> at 
> edu.wisc.ssec.mcidas.adde.AddeURLConnection.connect(AddeURLConnection.java:644)
> at 
> edu.wisc.ssec.mcidas.adde.AddeURLConnection.getInputStream(AddeURLConnection.java:819)
> at 
> ucar.unidata.idv.chooser.adde.AddeChooser.checkIfServerIsOk(AddeChooser.java:1187)
> at 
> ucar.unidata.idv.chooser.adde.AddeChooser.canAccessServer(AddeChooser.java:1230)
> at 
> ucar.unidata.idv.chooser.adde.AddeImageChooser.connectToServer(AddeImageChooser.java:802)
> at 
> ucar.unidata.idv.chooser.adde.AddeImageChooser.handleConnect(AddeImageChooser.java:634)
> at 
> ucar.unidata.idv.chooser.adde.AddeChooser.handleConnectFromThread(AddeChooser.java:600)
> 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:497)
> at ucar.unidata.util.Misc$2.run(Misc.java:1215)
> at ucar.unidata.util.Misc$3.run(Misc.java:1243)
> 
> 
> 


Ticket Details
===================
Ticket ID: TVD-517907
Department: Support IDV
Priority: Normal
Status: Closed