httpd has high CPU in ap_discard_request_body

Issue

• httpd hit high CPU in processes persisting in ap_discard_request_body:

Thread 1 (Thread 0x7fe625ed17e0 (LWP 16596)):
#0  0x00007fe61fa7fd29 in ?? () from /etc/httpd/modules/mod_logio.so
#1  0x00007fe61b594202 in ?? () from /etc/httpd/modules/mod_dumpio.so
#2  0x00007fe625cca518 in ap_http_filter ()
#3  0x00007fe625cc8c4d in ap_discard_request_body ()
#4  0x00007fe625cab2f9 in ap_finalize_request_protocol ()
#5  0x00007fe625cc5d88 in ap_send_error_response ()
#6  0x00007fe625cc8503 in ap_process_request ()
#7  0x00007fe625cc54a8 in ?? ()
#8  0x00007fe625cc1178 in ap_run_process_connection ()
#9  0x00007fe625ccd897 in ?? ()
#10 0x00007fe625ccdbb9 in ?? ()
#11 0x00007fe625cce83c in ap_mpm_run ()
#12 0x00007fe625ca3d10 in main ()