There was some chat about it but I don't know more.

Something bad happened yesterday around 15 UTC https://ganglia.wikimedia.org/latest/?r=custom&cs=10%2F11%2F2014+14%3A00&ce=10%2F12%2F2014+11%3A00&c=Miscellaneous+eqiad&h=antimony.wikimedia.org&tab=m&vn=&hide-hf=false&metric_group=ALLGROUPS

Up and down could be seen this weekend on #wikimedia-operations:

<icinga-wm> PROBLEM - git.wikimedia.org on antimony is CRITICAL: CRITICAL - Socket timeout after 10 seconds
<icinga-wm> RECOVERY - git.wikimedia.org on antimony is OK: HTTP OK: HTTP/1.1 200 OK - 54211 bytes in 4.834 second response time

According to <_joe_> this was due to gitblit being unstable and <paravoid> restarted java which made this problem disappear.
In general, gitblit has stability issues.

https://gerrit.wikimedia.org/r/#/c/188480/

echo "Gitblit has been restarted $(wget -O - https://wikitech.wikimedia.org/wiki/Server_Admin_Log 2> /dev/null| grep "restarted gitblit" | wc -l) times (plus when we did not log)"

Gitblit has been restarted 7 times (plus when we did not log)

http://git.wikimedia.org/ is giving me a lightly-styled Apache HTML error page
Internal error
Return to home page

It's HTTP status 500 (see below), not status 503 like task description.

HTTP/1.1 500 Server Error
    use_proxy = "no";
Content-Type: text/html;charset=UTF-8
Content-Language: en-US
Pragma: no-cache
Cache-Control: no-cache, max-age=0, must-revalidate
Server: Jetty(7.6.8.v20121106)
Content-Length: 1406
Accept-Ranges: bytes
Date: Thu, 26 Mar 2015 22:30:33 GMT
X-Varnish: 983879703
Age: 0
Via: 1.1 varnish
Connection: keep-alive
X-Cache: cp1043 miss (0)

Would T51371: GitBlit main page sets Cache-Control: no-cache help?

In T73974#1155506, @Spage wrote:

Would T51371: GitBlit main page sets Cache-Control: no-cache help?

Not much. Getting rid of the blasted tool would help more (T752)

yet another duplicate of T83702 etc

@Melos please see progress on T83702 , added you there too so we can close this one as a duplicate

@Negative24 yes, it is. thank you