apache - IE 11 shows "Page can't be displayed" on long running backend servlet processing -

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i have servlet takes more 6 minutes complete operation. application hosted on weblogic 12c accessed via bigip f5 load balancer , apache server. apache uses wl_proxy communicate weblogic. whenever servlet called ie shows "this page can't displayed". turned on wl_proxy log on apache server , found following:

exception type [read_timeout] (no read after 300 seconds) raised @ line 212 of ../nsapi/reader.cpp

so added wliotimeout directive in wl_proxy.conf fixed 1 part of problem. still shows same error after 5 minutes, , time saw following error in wl_proxy log:

fri jul 31 12:49:05 2015 <396114383469453> created new connection preferred server 'xxx.x.xxx.xxx/5096' '/getuseractivitiesreport.do?action=generatereport', local port:36249 fri jul 31 12:55:02 2015 <396114383469453> url::parseheaders: completestatusline set [http/1.1 200 ok] fri jul 31 12:55:02 2015 <396114383469453> url::parseheaders: statusline set [200 ok] fri jul 31 12:55:02 2015 <396114383469453> parsed headers ok fri jul 31 12:55:02 2015 <396114383469453> sendresponse() : r->status = '200' fri jul 31 12:55:02 2015 <396114383469453> write browser failed: calling url::close @ line 680 of ap_proxy.cpp fri jul 31 12:55:02 2015 <396114383469453> *******exception type [write_error_to_client] raised @ line 681 of ap_proxy.cpp fri jul 31 12:55:02 2015 <396114383469453> *not* failing on after sendresponse() exception: write_error_to_client fri jul 31 12:55:02 2015 <396114383469453> request [/getuseractivitiesreport.do?action=generatereport] did not process successfully..................

aapache access log request:

xxx.xxx.xxx.xxx - - [31/jul/2015:12:49:05 +0000] "post /getuseractivitiesreport.do?action=generatereport http/1.1" 200 10 "mozilla/5.0 (windows nt 6.1; trident/7.0; rv:11.0) gecko" "pshk9qecrbkaaa95afgaaaag" 80 357322233

now why browser closed connection! afaik ie 11 times out after 60 minutes. in ie developer saw connection "aborted". 1 faced types of issue. idea if there timeout set @ f5 level? in advance, debojit


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