Linux Apache Error

The users are unable to connect the Apache and i am getting the following error in the apache logs.some time the user get the access but some times they it start searching and searching
Error Log:
[Thu Aug 11 09:58:10 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx:4443, client xxxx
[Thu Aug 11 09:58:10 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 09:58:13 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:19 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:24 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:43 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:49 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:54 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:58:56 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx:4443, client xxxx
[Thu Aug 11 09:58:56 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 09:59:13 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:19 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:24 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:40 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx, client xxxx
[Thu Aug 11 09:59:40 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 09:59:43 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:49 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:54 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 09:59:56 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx:4443, client xxxx
[Thu Aug 11 09:59:56 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:00:13 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:19 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:24 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:43 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:49 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:54 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:00:56 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx:4443, clientxxxx
[Thu Aug 11 10:00:56 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:01:10 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxx:4443, client xxxx
[Thu Aug 11 10:01:10 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:01:13 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:19 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:24 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:43 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:49 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:54 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:01:57 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxxx:4443, client xxxx
[Thu Aug 11 10:01:57 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:02:13 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:19 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:24 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:41 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxx:4443, client xxxx
[Thu Aug 11 10:02:41 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:02:43 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:49 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:54 2016] [info] got an event: IAS/PM/PROC_READY
[Thu Aug 11 10:02:56 2016] mod_ossl: SSL call to NZ function nzos_Handshake failed with error 28864 (server xxxx:4443, client xxxx
[Thu Aug 11 10:02:56 2016] mod_ossl: SSL IO error [Hint: the client stop the connection unexpectedly]
[Thu Aug 11 10:03:00 2016] [warn] xxxx] read request line timed out
[Thu Aug 11 10:03:00 2016] [warn] [xxxx] oc4j_socket_recvfull timed out