Hi, all.
We are currently using Apache 2.2.10 as the reverse proxy for the EP 7.3.1. All of the apps are webdynpro for Abap based in ECC.
In 2 of the WDA apps, we get intermittent blue circle of death. The user action can be totally random in the apps when they hit the problem. So far, we are not able to reproduce it. When the spinning circle happens, SM04 and SM50 in ECC show no activity from that user. There is nothing from SM21, ST05(abap and sql trace) or the dev_* trace files. I don't think SAP is running anything for that user when that happens. Ultimately, the user will get a "bad request" or HTTP 400 from the Apache server.
Here is what I see from the apache access log and error log:
[31/Jul/2014:23:50:26 -0400] TLSv1 AES128-SHA "POST /sap/bc/webdynpro/sap/ZR_SSEPP_OPERATIONAL_SCHEDULE;sap-ext-sid=VcFRQjFOvu8TJYp9gDoeAA--4x1GQAg0MPPjCUEQif5iWQ--?sap-contextid=SID%3aANON%3asapprd_PR3_03%3aezUnW-FXtaYVyXREaAD7rxW0k8o5pk_n9RfjPfcB-NEW HTTP/1.1" 400 3004 "https://xxxxx/sap/bc/webdynpro/sap/ZR_SSEPP_OPERATIONAL_SCHEDULE;sap-ext-sid=VcFRQjFOvu8TJYp9gDoeAA--4x1GQAg0MPPjCUEQif5iWQ--" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; InfoPath.3)" 706345611
[Fri Aug 01 14:19:07 2014] [error] [client 10.4.53.198] (70014)End of file found: proxy: error reading status line from remote server xxxxxx, referer: https://xxxxx/sap/bc/webdynpro/sap/ZR_SSEPP_OPERATIONAL_SCHEDULE;sap-ext-sid=RaH2yjQlV6o7wVaj6wv6zA--LXTMFzjjKvcuwT*DXWoBmA--
Have you seen this error before? If you are using apache as the reverse proxy, would you mind to share the parameters you have?
Thanks,
Jonathan.