iis 7 - Application Pool automatically disabled in IIS 7 on Windows 2008R2 -


have web application running on several servers. 2 of servers having issues application pool becomes disabled. message in event viewer system log: application pool 'xxxxx' being automatically disabled due series of failures in process(es) serving application pool.

just prior message several other 'warning' messages: process serving application pool 'xxxxx' suffered fatal communication error windows process activation service. process id '1072'. data field contains error number. or process serving application pool 'xxxxx' terminated unexpectedly. process id '3644'. process exit code '0x0'.

running iis 7. servers failing running 2008r2 service pack1 , other running 2008r2 (no service pack).

in http log right before see appoffline message, there several connection_abandoned_by_reqqueue , client_reset messages.

i have read , reread many posting changing rapid-fail protection settings default of failure interval (minutes) 5 , maximum failures 5 can see after 5 failures in 5 minutes apppool stopped. however, doing changes number of issues during particular time before apppool stopped , not addressing root cause of problem.

what correct method determine why application failing?
difference in service pack on server culprit?

thanks.


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