So what happened to cause Reprap to go down?
Posted by A2
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So what happened to cause Reprap to go down? April 18, 2014 11:15PM |
Registered: 11 years ago Posts: 1,381 |
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Re: So what happened to cause Reprap to go down? April 18, 2014 11:29PM |
Admin Registered: 12 years ago Posts: 1,063 |
will have to navigate the log files for that, it was probably some kind of caching error,
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Re: So what happened to cause Reprap to go down? April 19, 2014 01:28AM |
Registered: 12 years ago Posts: 661 |
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Re: So what happened to cause Reprap to go down? April 19, 2014 03:32AM |
Registered: 12 years ago Posts: 334 |
I've been noticing this a lot more often lately.
WWW.ZATOPA.COM - Your Place for high quality 3D Printing Filament and accessories
WWW.ZATOPA.COM - Your Place for high quality 3D Printing Filament and accessories
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Re: So what happened to cause Reprap to go down? April 19, 2014 04:14AM |
Admin Registered: 14 years ago Posts: 7,213 |
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Re: So what happened to cause Reprap to go down? April 19, 2014 06:13AM |
Admin Registered: 12 years ago Posts: 3,096 |
At about one year ago in March, the site was down a lot too. I remember quite well since I was building my first 3D-printer back then and I couldn't reach here for information which was very frustrating.
Buuuut, a little bit of patience and I could go on.
I think there should be a bigger DONATE button on the site
Buuuut, a little bit of patience and I could go on.
I think there should be a bigger DONATE button on the site
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Re: So what happened to cause Reprap to go down? April 20, 2014 05:11AM |
Registered: 14 years ago Posts: 7,616 |
Quote
Ohmarinus
I think there should be a bigger DONATE button on the site
There's even some existing funding. I was asked to become a somewhat paid admin (think of $100/month). The problem is, once we have somebody paid, everybody will point his/her finger there, like "you're paid, so get done what's on my wishlist".
Currently, reprap.org is maintained, but I simply see no problems. I visit this page every day and it works flawlessly. Without flaws, fixing flaws isn't possible. Simple logic :-)
At wich time (GMT) do these dropouts happen?
| Generation 7 Electronics | Teacup Firmware | RepRap DIY |
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Re: So what happened to cause Reprap to go down? April 20, 2014 05:53AM |
Registered: 13 years ago Posts: 46 |
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Re: So what happened to cause Reprap to go down? April 20, 2014 10:24AM |
Registered: 11 years ago Posts: 903 |
During the 6/18 outage (over 7 hours here in North America), Nginx was answering HTTP requests but indicated a caching problem after a minute delay trying to load the page. I don't know the exact architecture in use, but from my experience with Apache as a front-end cache to a back-end web server this is almost always a problem with the back-end server crashing or having database problems. The wiki and main RepRap,org web sites were also down with the same error, FWIW.....
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Re: So what happened to cause Reprap to go down? April 21, 2014 06:53AM |
Registered: 14 years ago Posts: 7,616 |
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vreihen
Nginx was answering HTTP requests but indicated a caching problem after a minute delay trying to load the page.
That's useful information, thank you.
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vreihen
I don't know the exact architecture in use, but from my experience with Apache as a front-end cache to a back-end web server this is almost always a problem with the back-end server crashing or having database problems.
It's Gentoo Linux running MySQL and Apache. Apache forwards all file download requests (pictures) to Nginx (which reduces server load by some 60%).
| Generation 7 Electronics | Teacup Firmware | RepRap DIY |
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Re: So what happened to cause Reprap to go down? April 21, 2014 11:32AM |
Registered: 11 years ago Posts: 903 |
At about 14:15 UTC today, I tried to view reprap.org/wiki/Azteeg_X3. After a minute delay, I received a "502 Bad Gateway nginx/1.4.1" error.
At 14:30 UTC, I tried to get to this thread to post the above info, but the site wasn't responsive. After a 3+ minute delay, I received a "504 Gateway Time-out nginx/1.4.1" error.
Hopefully the server logs will reveal something useful.
As a side note, Repetier's web site was throwing an "Error establishing a database connection" at the same time that the above two errors occurred. Although a long shot, I wonder if someone isn't running a denial-of-service attack against RepRap sites for some spiteful reason?????
Edited 1 time(s). Last edit at 04/21/2014 11:32AM by vreihen.
At 14:30 UTC, I tried to get to this thread to post the above info, but the site wasn't responsive. After a 3+ minute delay, I received a "504 Gateway Time-out nginx/1.4.1" error.
Hopefully the server logs will reveal something useful.
As a side note, Repetier's web site was throwing an "Error establishing a database connection" at the same time that the above two errors occurred. Although a long shot, I wonder if someone isn't running a denial-of-service attack against RepRap sites for some spiteful reason?????
Edited 1 time(s). Last edit at 04/21/2014 11:32AM by vreihen.
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Re: So what happened to cause Reprap to go down? April 21, 2014 11:32AM |
Admin Registered: 14 years ago Posts: 730 |
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Re: So what happened to cause Reprap to go down? April 21, 2014 11:39AM |
Registered: 15 years ago Posts: 800 |
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Re: So what happened to cause Reprap to go down? April 21, 2014 01:27PM |
Registered: 11 years ago Posts: 903 |
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Re: So what happened to cause Reprap to go down? April 21, 2014 01:40PM |
Registered: 11 years ago Posts: 903 |
This telnet test output says it all:
Edited 2 time(s). Last edit at 04/21/2014 01:43PM by vreihen.
~/ $ telnet forums.reprap.org 80 Trying 69.46.82.69... Connected to forums.reprap.org. Escape character is '^]'. GET / (html) (head)(title)502 Bad Gateway(/title)(/head) (body bgcolor="white") (center)(h1)502 Bad Gateway(/h1)(/center) (hr)(center)nginx/1.4.1(/center) (/body) (/html) Connection closed by foreign host. ~/ $
Edited 2 time(s). Last edit at 04/21/2014 01:43PM by vreihen.
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Re: So what happened to cause Reprap to go down? April 21, 2014 01:45PM |
Registered: 11 years ago Posts: 903 |
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Re: So what happened to cause Reprap to go down? April 21, 2014 02:16PM |
Admin Registered: 12 years ago Posts: 1,063 |
i just got the 502 error again and restarted apache at 3:30am ish (mytime)(australia)
-=( blog )=- -=( thingiverse )=- -=( 3Dindustries )=- -=( Aluhotend - mostly metal hotend)=--=( Facebook )=-
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Re: So what happened to cause Reprap to go down? April 21, 2014 04:09PM |
Admin Registered: 12 years ago Posts: 3,096 |
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Re: So what happened to cause Reprap to go down? April 22, 2014 04:09AM |
Registered: 15 years ago Posts: 800 |
i changed my dns on my router back to open dns. i am still getting this error though
[mike-mack.blogspot.com]
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Not Found
The requested URL /bin/view/Main/WebHome was not found on this server.
[mike-mack.blogspot.com]
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Re: So what happened to cause Reprap to go down? April 22, 2014 03:18PM |
Registered: 14 years ago Posts: 7,616 |
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dissidence
The requested URL /bin/view/Main/WebHome was not found on this server."
No surprise on this one. Such a thing simply doesn't exist.
| Generation 7 Electronics | Teacup Firmware | RepRap DIY |
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Re: So what happened to cause Reprap to go down? April 22, 2014 09:19PM |
Registered: 15 years ago Posts: 800 |
thats been my bookmark for ages, also what chrome used for my most popular pages..lol
oh well.
[mike-mack.blogspot.com]
oh well.
[mike-mack.blogspot.com]
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Re: So what happened to cause Reprap to go down? April 23, 2014 07:10AM |
Registered: 14 years ago Posts: 7,616 |
@dissidence: reprap.org also changed ages ago :-)
Finally I got these 502's, too. It's a SYN flood attack, excerpt from dmesg:
Now investigating why it stalls Apache, but not Nginx.
Finally I got these 502's, too. It's a SYN flood attack, excerpt from dmesg:
possible SYN flooding on port 80. Sending cookies. possible SYN flooding on port 80. Sending cookies. TCP: Peer 93.39.64.143:62297/80 unexpectedly shrunk window 779876073:779883373 (repaired) TCP: Peer 187.195.191.16:54635/80 unexpectedly shrunk window 1932683412:1932686316 (repaired) TCP: Peer 187.195.191.16:54635/80 unexpectedly shrunk window 1932683412:1932686316 (repaired) TCP: Peer 212.3.79.6:38850/80 unexpectedly shrunk window 1429369216:1429372694 (repaired) INFO: RCU detected CPU stalls: 1 (detected by 3, t=1007 jiffies) sending NMI to all CPUs: INFO: RCU detected CPU stalls: 3 (detected by 0, t=1002 jiffies) sending NMI to all CPUs: INFO: RCU detected CPU 0 stall (t=1016 jiffies)
Now investigating why it stalls Apache, but not Nginx.
| Generation 7 Electronics | Teacup Firmware | RepRap DIY |
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Re: So what happened to cause Reprap to go down? April 23, 2014 07:17AM |
Admin Registered: 12 years ago Posts: 1,063 |
what version of apache is running?
-=( blog )=- -=( thingiverse )=- -=( 3Dindustries )=- -=( Aluhotend - mostly metal hotend)=--=( Facebook )=-
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Re: So what happened to cause Reprap to go down? April 23, 2014 01:01PM |
Admin Registered: 12 years ago Posts: 954 |
Hello everybody, my 2 cents.
Speaking as an admin I can assure I've got 502 errors in the past. And always when I was managing the forum from the Admin's panel; I don't know why but it happens, example:
- Access the panel
- Modify the description text of a section (everything ok)
- Refresh the forum's page to see the editing (everything ok)
- Modify another section's description (502 error after "Apply" button)
- Wait 2 minutes and refresh the RepRap forum's page, the last editing got saved and everything works.
This is my experience, I've got 502 error also when moderating posts.
About today, no signs of error but I'm connected from the afternoon (Italy time).
Edit: I've opened a topic about this in the italian section and users are telling they got problems (Bad Gateway) in these days.
Edited 1 time(s). Last edit at 04/23/2014 02:58PM by Gordie.
Speaking as an admin I can assure I've got 502 errors in the past. And always when I was managing the forum from the Admin's panel; I don't know why but it happens, example:
- Access the panel
- Modify the description text of a section (everything ok)
- Refresh the forum's page to see the editing (everything ok)
- Modify another section's description (502 error after "Apply" button)
- Wait 2 minutes and refresh the RepRap forum's page, the last editing got saved and everything works.
This is my experience, I've got 502 error also when moderating posts.
About today, no signs of error but I'm connected from the afternoon (Italy time).
Edit: I've opened a topic about this in the italian section and users are telling they got problems (Bad Gateway) in these days.
Edited 1 time(s). Last edit at 04/23/2014 02:58PM by Gordie.
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Re: So what happened to cause Reprap to go down? April 23, 2014 06:26PM |
Registered: 14 years ago Posts: 7,616 |
502s happen in forum and wiki at the same time, so it can't be a web software issue. Apache is version 2.2.24.
| Generation 7 Electronics | Teacup Firmware | RepRap DIY |
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Re: So what happened to cause Reprap to go down? April 23, 2014 07:28PM |
Registered: 11 years ago Posts: 903 |
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