Can you zip up and post the server log from the agent handler at the point when it hangs?
Same happens to me with a newly installed Agent Handler. OS ist Windows 2008 SP2, ePO Version 4.5.4 HF 1. Eventlog shows multiple "event 1000" - entries:
Faulting application apache.exe, version 126.96.36.199, time stamp 0x48d60715, faulting module ntdll.dll, version 6.0.6002.18327, time stamp 0x4cb73436, exception code 0xc0000005, fault offset 0x00044961, process id 0x1910, application start time 0x01cc8a42be12d019
These appear every 2 to 20 minutes.
When restarting the eventparser (which ceased to process events) everything works again - for a short time. Attached is a server.log. Crashes happened at 10:49 and 10:51.
server.zip 16.6 K
ePO Patch 5 resolved the issue for us.