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Installation/update issue: Another Sage Notebook server is running

asked 2017-06-07 00:11:23 +0200

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I have a mystery in updating Sage on a MacBook Air. (To be precise, I'm updating it on three MacBook Airs; two of them have Sage working fine, but the third...) Both Sage 7.6 and 7.2 are installed. Sage 7.2 worked fine on this machine before today, as far as I know. I updated the operating system to Sierra and then installed Sage 7.6 (yes, the OS 12.3 version).

When I start up Sage, I get the "Starting, please wait..." page, and then the localhost:8080 page tries to load, but I get "The connection was refused when attempting to contact localhost:8080." The first thing I checked was the security settings; there are no firewalls or anything on the machine. The next thing I checked was looking at sage.log, and here there is the statement Another Sage Notebook server is running, PID 365.

Now: I quit Sage 7.6 and tried running Sage 7.2 and got the same results (meaning the same error messages.) I looked to see whether there was a process with PID 365 under Activity Monitor, and there was---followupd. I restarted the machine, started Sage 7.6, got the same results, and... now PID 365 is a WiFiproxy (because I've restarted the machine) so that is definitely not a Sage notebook server.

I will completely believe that a past user of this machine (possibly me) has done something stupid that is causing the problem... but what?

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As an aside, if you can find the process id of the sage server running, you can use top or ps ax to list the running processes on your computer, and then kill -9 PID where you replace the PID with the processes running these.

kcrisman gravatar imagekcrisman ( 2017-06-07 15:05:41 +0200 )edit

The problem was that (a) in the process list, there was only one Sage-related process, and (b) the PID listed by Sage was something different.

smbelcas gravatar imagesmbelcas ( 2017-06-07 20:16:12 +0200 )edit

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answered 2017-06-07 20:17:43 +0200

smbelcas gravatar image

Uninstall all versions of Sage, including .sage/sage_notebook.sagenb in the home directory. Then reinstall the newest version of Sage. That should work! (Or rather, past self, I just did that, and it did work.)

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Asked: 2017-06-07 00:11:23 +0200

Seen: 420 times

Last updated: Jun 07 '17