I found some logging on the NetBackup Appliance (bpbrm)
16:10:33.854 [66498] <2> logparams: -backup -S netbackup -c xxxx.tros.nl -ct 0 -ru root -cl PHYSICAL_LINUX_SPECIAL -sched Daily_Dinc -bt 1422457833 -dt 3902 -st 1 -b xxxx.tros.nl_1422457833 -mediasvr netbackup -jobid 4581 -jobgrpid 4580 -masterversion 760000 -maxfrag 51200 -bpstart_time 1422458133 -reqid -1421688207 -mt 0 -to 0 -stunit STU_MSDP_NETBACKUP -rl 1 -rp 1209600 -eari 0 -p PureDiskVolume -mst 6 -flags 2 -storagesvr netbackup -sts_type PureDisk -use_ofb -use_otm -jm -secure 1 -kl 13 -rg root -fso -fscp -stream_count 2 -stream_number 2 -connect_options 16974338
16:10:33.854 [66498] <4> bpbrm main: ensured stderr cannot be used
16:10:33.855 [66498] <2> bpbrm main: max_entries_per_add = 5000
16:10:33.856 [66498] <2> read_client: dname=., offline=0, online_at=0 offline_at=0
16:10:33.856 [66498] <2> read_client: dname=.., offline=0, online_at=0 offline_at=0
16:10:33.856 [66498] <2> read_client: dname=CO_0, offline=0, online_at=0 offline_at=0
16:10:33.856 [66498] <2> read_client: dname=OA_0, offline=0, online_at=0 offline_at=0
16:10:33.856 [66498] <2> read_client: dname=host_info, offline=0, online_at=0 offline_at=0
16:10:33.856 [66498] <2> read_host_info: CONNECT_NON_RES_PORT 2
16:10:33.856 [66498] <2> read_host_info: DYNAMIC_ADDRESS 0
16:10:33.856 [66498] <2> read_host_info: FREE_BROWSE 0
16:10:33.856 [66498] <2> read_host_info: LIST_RESTORE 0
16:10:33.856 [66498] <2> read_host_info: MAX_JOBS_THIS_CLIENT 3
16:10:33.856 [66498] <2> read_host_info: NO_CALLBACK 2
16:10:33.856 [66498] <2> read_host_info: WOFB_ENABLED 1
16:10:33.856 [66498] <2> read_host_info: WOFB_FIM 1
16:10:33.856 [66498] <2> read_host_info: WOFB_USAGE 0
16:10:33.856 [66498] <2> read_host_info: WOFB_ERROR 0
16:10:33.856 [66498] <2> read_host_info: DAEMON_PORT_TYPE 3
16:10:33.856 [66498] <2> read_host_info: OST_CLIENT_DIRECT 0
16:10:33.856 [66498] <2> read_host_info: OST_PROXY 0
16:10:33.856 [66498] <2> read_host_info: OST_PROXY_SERVER *NULL*
16:10:33.856 [66498] <2> read_host_info: OST_CLIENT_DIRECT_RESTORE 0
16:10:33.856 [66498] <2> db_freeEXDB_INFO: ?
16:10:33.868 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.869 [66498] <2> logconnections: BPCD CONNECT FROM xx.xx.xx.150.40234 TO xx.xx.yy.8.1556 fd = 4
16:10:33.873 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.874 [66498] <8> do_pbx_service: [vnet_connect.c:2156] via PBX VNETD CONNECT FROM xx.xx.xx.150.39411 TO xx.xx.yy.8.1556 fd = 5
16:10:33.874 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:440] VN_REQUEST_CONNECT_FORWARD_SOCKET 10 0xa
16:10:33.875 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:457] ipc_string /usr/openv/var/tmp/vnet-66559422457833871812000000341-5ihqJV
16:10:33.957 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:33.958 [66498] <2> bpbrm start_bpcd_stat: DATA_SOCK from bpcr = 4
16:10:33.958 [66498] <2> bpbrm start_bpcd_stat: NAME_SOCK from bpcr = 5
16:10:33.958 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:33.964 [66498] <2> read_legacy_touch_file: Found /usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_DISK; requested from (miscsvr.c.521).
16:10:33.964 [66498] <2> read_legacy_touch_file: 2097152 read ; requested from (miscsvr.c.521).
16:10:33.965 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.965 [66498] <2> job_connect: SO_KEEPALIVE set on socket 4 for client netbackup
16:10:33.965 [66498] <2> logconnections: BPJOBD CONNECT FROM xx.xx.xx.150.58981 TO xx.xx.xx.150.1556 fd = 4
16:10:33.965 [66498] <2> job_authenticate_connection: ignoring VxSS authentication check for now...
16:10:33.966 [66498] <2> job_connect: Connected to the host netbackup contype 53 jobid <4581> socket <4>
16:10:33.966 [66498] <2> job_connect: Connected on port 58981
16:10:33.966 [66498] <2> bpbrm main: send_3_0_client_params = 1
16:10:33.969 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.969 [66498] <2> logconnections: BPCD CONNECT FROM xx.xx.xx.150.44266 TO xx.xx.yy.8.1556 fd = 5
16:10:33.971 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.971 [66498] <8> do_pbx_service: [vnet_connect.c:2156] via PBX VNETD CONNECT FROM xx.xx.xx.150.54381 TO xx.xx.yy.8.1556 fd = 6
16:10:33.972 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:440] VN_REQUEST_CONNECT_FORWARD_SOCKET 10 0xa
16:10:33.972 [66498] <8> vnet_pop_byte: [vnet.c:194] errno 0 0x0
16:10:33.972 [66498] <2> vnet_pop_byte: vnet.c.196: 0: Function failed: 9 0x00000009
16:10:33.972 [66498] <2> vnet_pop_string: vnet.c.276: 0: Function failed: 9 0x00000009
16:10:33.972 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:454] status 9 0x9
16:10:33.972 [66498] <2> bpcr_vnetd_connect_forward_socket_begin: vnet_vnetd_connect_forward_socket_begin() failed: 9
16:10:33.972 [66498] <2> local_bpcr_connect: bpcr_vnetd_connect_forward_socket_begin failed: 23
16:10:33.972 [66498] <2> ConnectToBPCD: bpcd_connect_and_verify(xxxx.tros.nl, xxxx.tros.nl) failed: 23
16:10:33.972 [66498] <16> bpbrm start_bpcd_stat: bpcd on xxxx.tros.nl exited with status 23: socket read failed
16:10:33.972 [66498] <4> db_error_add_to_file: bpcd on xxxx.tros.nl exited with status 23: socket read failed
16:10:33.972 [66498] <2> bpbrm start_bpcd: ../bpbrm.c.23102: start_bpcd_stat failed: 23 23 0x00000017
16:10:33.973 [66498] <2> bpbrm kill_child_process: start
16:10:33.973 [66498] <2> bpbrm Exit: attempting to send mail to root on xxxx.tros.nl
16:10:33.974 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.975 [66498] <2> logconnections: BPCD CONNECT FROM xx.xx.xx.150.55643 TO xx.xx.yy.8.1556 fd = 5
16:10:33.976 [66498] <2> vnet_pbxConnect: pbxConnectEx Succeeded
16:10:33.977 [66498] <8> do_pbx_service: [vnet_connect.c:2156] via PBX VNETD CONNECT FROM xx.xx.xx.150.33774 TO xx.xx.yy.8.1556 fd = 6
16:10:33.977 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:440] VN_REQUEST_CONNECT_FORWARD_SOCKET 10 0xa
16:10:33.978 [66498] <8> vnet_vnetd_connect_forward_socket_begin: [vnet_vnetd.c:457] ipc_string /usr/openv/var/tmp/vnet-66563422457833974589000000341-5ihqJV
16:10:34.062 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:34.062 [66498] <2> bpbrm Exit: OUT_SOCK from bpcr = 5
16:10:34.062 [66498] <2> bpbrm Exit: IN_SOCK from bpcr = 6
16:10:34.062 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:34.063 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:34.092 [66498] <2> bpcr_get_version_rqst: bpcd version: 07610000
16:10:34.107 [66498] <2> bpbrm Exit: client backup EXIT STATUS 23: socket read failed
16:10:34.111 [66498] <2> job_monitoring_exex: ACK disconnect
16:10:34.111 [66498] <2> job_disconnect: Disconnected
What is going on here (Bold text)?