linux - 502 Bad Gateway HAproxy -


i have ubuntu 12.04lts running. webserver tomcat 7.0.42 , use haproxy proxy server. application servlet application uses websockets.

sometime when request page "502 bad gateway" error on resources not on all, on some. think has haproxy configuration, following: 

global     maxconn     4096 # total max connections. dependent on ulimit     nbproc      1  defaults     mode        http     option  http-server-close     option httpclose #   option  redispatch     no option checkcache  # test against 502 error  frontend 0.0.0.0:80     timeout client 86400000     default_backend www_backend     acl is_websocket hdr(upgrade) -i websocket     acl is_websocket hdr_beg(host) -i ws      use_backend socket_backend if is_websocket      backend www_backend         balance roundrobin         option forwardfor # sets x-forwarded-for         timeout server 30000         timeout connect 4000         server apiserver localhost:8080 weight 1 maxconn 1024 check      backend socket_backend         balance roundrobin         option forwardfor # sets x-forwarded-for         timeout queue 5000         timeout server 86400000         timeout connect 86400000         server apiserver localhost:8080 weight 1 maxconn 1024 check

what have change prevent 502 error?

first, enable haproxy logging. tell why giving 502's. guess backend "localhost:8080" not able keep or not able connection within 4000ms "timeout connect 4000".


Comments

Post a Comment

Popular posts from this blog

html - How to style widget with post count different than without post count -

i have border below li elements in wordpress widget types appropriate. element inside set block gives them nice easy click full width. the problem, when choose option "show post count" when adding widget such categories or archives displays post count plain text after tag , because tag block pushes post number text line below. whether choose show post count or not show post count still gives exact same element identifyer example "widget_categories". how style post count not on next line still keep links non post count list items full width? here's example on sidebar www.bbmthemes.com/themes/modular/blog-standard/ in order solve problem need remove display:block; for ul.widgets ul a , add in it's place line-height: 33px; what going achieve have same visual effect. what going lose doing links going work on text , not on "box". the other way out of find post count coming , make changes this. example change text count i...
Read more

How to remove text and logo OR add Overflow on Android ActionBar using AppCompat on API 8? -

have researched death , cannot find answer. i have actionbar using appcompat. supporting api v7 (api v8 do). actionbar works api v11. api < v11 has problem of removing icon (and feature) actionbar without supplying overflow. big picture have app logo, app title, , 3 icons squidging same actionbar on low end phone. trying make room! i happy 1 of 2 solutions. either: a method of getting overflow functionality can retrieved pull down. (preferred) method of removing icon , text actionbar below current xml api 11+: <resources> <!-- base application theme api 11+. theme replaces appbasetheme res/values/styles.xml on api 11+ devices. --> <style name="appbasetheme" parent="theme.appcompat.light.darkactionbar"> <item name="android:actionbarstyle">@style/liteactionbarstyle</item> <item name="actionbarstyle">@style/liteactionbarstyle</item> </st...
Read more

mysql - Pass value between different pages (form) with PHP -

i trying bring value form in page1.php (form add data db) page2.php (form add img db). read whole bunch of pages how still can't figure out. <form name="formbrokertour" class="login-form-addproperty" method="post" action="insertpropertyinfowithgeocode.php" onsubmit="return validateform()"> and need add several fields, address, city, zip code state. here 1 out of 4: <td width="125" class="formlable">address</td> <td width="269" class="formsquare"> <input type="text" class="general_input" name="address" id="nametext" width="269" > </td> page2.php (relevant part) - see, if write address, address addded in database, don't need worry sql being wrong. if try pass info page 1 page 2 either session (since have username in place add info in database) or post/get, address not added. interes...
Read more