Web interface AJAX timeouts
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I'm printing now but I keep getting timeouts. I got two in a row after restarting the same print (had to power cycle the printer both times) and then this one got a ways in before it timed out. The print is still going, but I need to reconnect to increase the temp by 5 degrees. Its been 25 minutes since the DC and I still can't connect.
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Nyl0cke, check out the resolution on this thread:
https://www.duet3d.com/forum/thread.php?id=38&p=2It will be interesting to see what effect this has
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Seems like this fix is only for static files (css/html/js) coming from Duet to browser. But not for dynamic ajax responses.
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Yeah I'm also still getting a lot of errors. About the same amount, maybe more but its a small sample size so it might be coincidence.
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1. Those of you who are getting Ajax disconnects: is the Error Reason at the bottom of the box always given as timeout?
2. If you ever find that you can't reconnect after a disconnect, please try the following if possible:
A. Close the browser tab, open a new one and try to connect in that.
B. If that doesn't work, use Pronterface or PanelDue to send M552 S0 followed by M552 S1 to restart the wifi module. Then try to connect.
C. If that doesn't work, run M122 from Pronterface and see what the number of free buffers is.
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Yes for me. I canceled the print I had going (had a mechanical problem I had to fix) and I updated the web server and now I can't keep connected for more than a couple minutes it seems. its been anywhere between 30 seconds to 8 minutes right now.
I'll try what you said when it happens again
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It certainly is for me.
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- A. Connect from another browser instance (machine) works but is slow
B. Hasn't been necessary yet and I have no paneldue on this machine
C. Will try next time if I can't reconnect
Seems to be worse after I went from wired-wifi connection to wifi-wifi after I moved my laptop. Upload speeds dropped to ~250k (even seen 30-40k on smallish files!).
Hope you can find a fix for timeouts as well as speed.
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Okay, If it disconnects I can not reconnect by opening a new tab and trying to connect. If I connect to the board via serial I can turn off the server and turn it back on and I can connect.
I can leave it connected but I can't test while printing for a while, the mount I used for my hotend isn't working very well, the hotend is moving around in its mount (flying extruder) a good 3mm or so.
I also tried reconnecting on a different computer to no avail.
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I've been chasing timeout problems on my thread here too. I also can not reconnect after a timeout but can do things from PanelDue. When I first commissioned Duet WiFi using the installed firmware, it was up and running for well over 48 hrs with no time outs. I then attempted to install a custom DWC.bin (simple hack) and it has been disconnecting within 1 minute since and once disconnected, I can't stay connected. I copied and pasted all of the error dialogs and exactly what I did on my thread. I'm now going to go back and reinstall all of the original binaries and see what happens and do some network captures in wireshark.
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I think I've always been able to reconnect without power cycling. Maybe once did I have to, otherwise a reload of the page or clicking the connect button worked.
Have not upgraded to the recently released firmware though.
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I've reverted back to the pre-production firmware that shipped with the board and when I disconnect now, I have to reset or turn off/on wifi in order to reconnect. But, once connected it always disconnects quickly afterwards (1-60 seconds or so).
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I was having connection issues with the original firmware shipped (had to restart the board or wifi interface, or there was a time or two where I waited an hour and it was working again), but only after a couple hours normally. The issues became more frequent with the newer firmwares for me, but I'm not sure if its actually because of the newer firmwares, since hackney has tried downgrading to the shipped firmwares with the same issues.
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Those of you who haven't tried the new firmware bundle and are getting occasional disconnects, please can you try installing the DuetWebControl.bin from the new firmware bundle. You need to upload is to the SD card /sys directory (which you can do via the Settings page of DWC), then run M997 S2. It takes a few minutes to install, so preferably have Pronterface or a PanelDue connected so that you can see the progress and make sure it completed successfully.
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This is interesting, using some network monitoring tools and the admin console for my Verizon Quantum router I discovered that I had a few odd things going on on my network. Several devices which I could not identify were issuing a lot of packets and that seemed to be causing timeouts. Also, the Windows laptop that I VPN in into work was chewing up a lot of bandwidth. The Quantum router supports dual frequency but none of my devices were connecting the the 5GHz. So I created a new SSID for 5GHz and connect my lap worktop to it. Now, I haven't had a single disconnect in several hours from the Duet WiFi! And the Wireshark logs looks clean as a whistle.
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I had issues when I was using safari+the 5ghz frequency on my router so I switched and they seemed to go away. I switched to firefox because of other ajax issues I encountered, so me watching youtube etc while on the 2.4ghz frequency probably was causing the issues. I just switched back to the 5ghz network and I haven't had a disconnect in the 5 minutes its been up so its a good sign so far.
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Since I posted it I have gotten 0 timeouts. Guess the network load really does affect it quite a lot.
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Turns out that it was my network - it was congested. I cleaned up some devices and also repartitioned to have an explicit SSID for 5GHz and now I'm connected rock solid.
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does the beta firmware have these changes as well? as I'm still getting timeouts with it.
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It's really weird that some nights I get the timeouts constantly, and some nights I make it 4+ hours without one.
See my previous couple of posts. I had a very similar behavior running Duet on Wifi with the previous generation of boards. Now that I've found issues on my network and corrected them, I'm staying connected again. Could be that during those times of high disconnect someone on your network is using a lot of bandwidth? Get a copy of Wireshark and learn how to capture a basic session if you don't already. It might be very revealing as it was for me.
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does the beta firmware have these changes as well? as I'm still getting timeouts with it.
The change that I made to try to reduce the number of ajax timeout errors was to add one retry when the browser times out waiting for a reply to a status request message. That change is included in the new DuetWebControl.bin file. You can use that file independently of which other firmware files you have installed. You can tell if you are running it because on the SettIngs page of DuetWebControl, the web interface version will be "HTML: 1.11b-dc42, JS: 1.11b-dc42".
I haven't added retries to the other message types yet. Also, if the Duet is losing the wifi connection to the router completely (which was happening to mhackney), a retry won't help and you will find that you can't reconnect unless you stop and restart the wifi module.
