asp.net - In IIS, why app in application pool always stops and IIS service becomes Unavailable (503) -
i have changed domain user's password, run iisreset many times , met problem
it fine open local site @ first time, if refresh or click link on page (which in local server) got 503 error service unavailable.
and app relates unavailable site automatically stopped, after manually restart it. if tried restart app, said not start if (windows activation service) service not running. restarting service didn't anything.
even if run iisreset, local website still available @ first (or second) visit.
any 1 knows how solve problem ?
ps: system windows 2012 r2, iis version 6.2
thanks
a request comes server, picked http.sys (the kernel part of iis) doesn't know , asks (windows activation service), checks configuration , figures out web site , application pool used request. if pool not running, trying start it. if can't start pool, reports http.sys: "sorry, tried can't start pool" @ point http.sys has no option responding service request not available.
if @ response header of failed request, see
server: microsoft httpapi/2.0
rather
server:microsoft-iis/8.5
that means response comes http.sys rather user mode part of iis.
the httperr log %systemroot%\system32\logfiles\httperr
may have helpful information.
maybe request made log file site, http sub-status code next 503
may helpful know.
most often, pool can not started due authentication problems. double check identity of pool. use security event log or process monitor troubleshoot.
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