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Questions tagged [503-error]

112 questions
42
votes
5 answers

AWS ELB Apache2 503 Service Unavailable: Back-end server is at capacity

We've been running a couple websites off Amazons AWS infrastructure for about two years now and as of about two days ago the webserver started to go down once or twice a day with the only error I can find being: HTTP/1.1 503 Service Unavailable:…
JSP
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13
votes
1 answer

HAProxy responding with NOSRV while backend is up

I have a strange situation where requests to my HAProxy are returning with a 503. HAProxy logs show it returning a NOSRV error: Mar 26 19:47:01 localhost haproxy[23910]: 10.0.0.30:34261 [26/Mar/2013:19:46:48.579] fe v2/…
Raj
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9
votes
1 answer

How can I make nginx always return a HTTP 503?

I am using HAproxy in front of an app that is on multiple other servers. I would like to set up a vhost in a local nginx instance that only serves a 503 for every request (to use as the 'backup' server when all backends are down). I know how to set…
Dave Forgac
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8
votes
3 answers

Getting 503 error from Varnish but varnishlog doesn't tell much

Running Varnish 4 and I'm occasionally getting 503 errors which I can't put my finger in. I've tried curling the backend directly and it's returning a response everytime so it doesn't look like the issue is there. Below is entry from my varnishlog…
Axsuul
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8
votes
2 answers

How can I make Nginx return HTTP 503 when my proxied app server is down?

I have an nginx web server sitting in front of a Jetty Java app server running a web application. I'd like to configure nginx to return a HTTP 503 if the proxied Jetty server is down. This way when I bring the app server down for maintenance, of if…
Richard Nichols
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7
votes
2 answers

mod_proxy returns 503 errors even after proxied service is back up

I have a setup with Apache2 as a front-end server for multiple python apps served by gunicorn. My Apache2 setup using mod_proxy looks like this: ServerName example.com UseCanonicalName On ServerAdmin…
Benjamin Wohlwend
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6
votes
6 answers

Exchange 2013 ECP/OWA/Outlook all failing - 503 Service Unavailable

My exchange server is really suffering at the moment. I do not know what has happened but when I connect via https (ECP/OWA) or via outlook (with in the network) I get 503 errors on ECP/OWA and Disconnected/Trying to connect in Outlook. I assume it…
Simon
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6
votes
2 answers

HTTP Error 503. The service is unavailable. On Windows 2008 with iisstart.htm

We're getting "HTTP Error 503. The service is unavailable.". Googling has provided lots of near hits, but none have worked so far. The flow is: - confirm all app pools started - open browser to http://localhost, get 503 error - app pool is now…
Alien Technology
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5
votes
1 answer

haproxy 1.5 specific source IP address show 503 SC in haproxy log

I have an unusual problem (as everyone does on this site). I have HAProxy listening on port 80 and 443. I am offloading SSL encryption to HAproxy and passing all traffic to my web servers on port 80. There is a firewall in front of my HAProxy server…
Brad
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5
votes
2 answers

Win2k8R2 / IIS 7.5 - users getting 503 response, no 503 error reported in logs

I've got 2 web servers with mirrored content. There's a load balancer sitting in front of them. Starting yesterday we've been getting people complaining about 503 errors. i can't find any 503 errors in the IIS log file. However the server host is…
merk
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4
votes
1 answer

Ubuntu Apache Server 503 Error: disabled connection for (localhost)

in a bit of a bind here. I'm trying to move a website (www.monkhouselaw.com) from one hosting company to my Digital Ocean VPS. I've changed the DNS settings to: * -> 107.170.29.18 www -> 107.170.29.18 monkhouselaw -> 107.170.29.18 This then directs…
CGriffin
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4
votes
4 answers

Varnish 3.0.2 to Apache2 sometimes return error 503

Hey guys I hope you can help me out here. I have an Ngingx parsing http and https to a varnish cache(3.0.2). From the varnish it is sent to apache2. Now I have for some time been tracking some strange 503 errors. But I cant seem to find the silver…
Ronnie Jespersen
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4
votes
4 answers

Getting random/intermittent 503 errors on my local IIS website

I've set up an ASP.NET MVC website in my local IIS 7 server. It was working fine for a while, but suddenly it seems to be returning 503 errors at random intervals, for random requests. If I browse to it in my web-browser, I'll sometimes get a 503,…
jonathanconway
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4
votes
10 answers

How do I resolve a 503 Server Unavailable connection error on VMware ESXi?

I have a VMware ESXi server which has been up and running for nearly 200 days. The past few days, when I try to connect to it using the VMware vSphere Client, I am unable to connect. After entering my username and password, I see the little spinning…
Josh
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4
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5 answers

What could be causing random image/css dropping, 503 errors on a apache/php hosting website?

I host my PHP website on shared hosting. It's worked well for a year. All of a sudden last week it started to randomly drop images, sometimes does not load the CSS file, and often gets 503 errors. My provider says it is "too much traffic". But since…
Edward Tanguay
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