[] nw_host_stats_add_src recv too small, received 24, expected 28

xcode8 iOS10 突然報下面錯誤

2016-11-26 08:54:28.391921 OrdersManager[618:20889] [] nw_host_stats_add_src recv too small, received 24, expected 28
2016-11-26 08:54:28.392575 OrdersManager[618:20889] [] nw_host_stats_add_src recv too small, received 24, expected 28
2016-11-26 08:54:28.395006 OrdersManager[618:20896] [] nw_host_stats_add_src recv too small, received 24, expected 28
2016-11-26 08:54:28.398352 OrdersManager[618:20896] [] ____nwlog_simulate_crash_inner_block_invoke dlopen CrashReporterSupport failed
2016-11-26 08:54:28.398608 OrdersManager[618:20896] [] __nwlog_err_simulate_crash simulate crash failed "nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available"
2016-11-26 08:54:28.399453 OrdersManager[618:20896] [] nw_socket_set_common_sockopts setsockopt SO_NOAPNFALLBK failed: [42] Protocol not available, dumping backtrace:
        [x86_64] libnetcore-856.20.4
    0   libsystem_network.dylib             0x0000000106b24682 __nw_create_backtrace_string + 123
    1   libnetwork.dylib                    0x0000000106ff8932 nw_socket_add_input_handler + 3100
    2   libnetwork.dylib                    0x0000000106fd64f4 nw_endpoint_flow_attach_protocols + 3768
    3   libnetwork.dylib                    0x0000000106fd5511 nw_endpoint_flow_setup_socket + 563
    4   libnetwork.dylib                    0x0000000106fd4270 -[NWConcrete_nw_endpoint_flow startWithHandler:] + 2612
    5   libnetwork.dylib                    0x0000000106fef44d nw_endpoint_handler_path_change + 1261
    6   libnetwork.dylib                    0x0000000106feee7c nw_endpoint_handler_start + 570
    7   libnetwork.dylib                    0x0000000107006ae5 nw_endpoint_resolver_start_next_child + 2240
    8   libdispatch.dylib                   0x00000001068a1980 _dispatch_call_block_and_release + 12
    9   libdispatch.dylib                   0x00000001068cb0cd _dispatch_client_callout + 8
    10  libdispatch.dylib                   0x00000001068a8e6b _dispatch_queue_serial_drain + 236
    11  libdispatch.dylib                   0x00000001068a9b9f _dispatch_queue_invoke + 1073
    12  libdispatch.dylib                   0x00000001068ac3b7 _dispatch_root_queue_drain + 720
    13  libdispatch.dylib                   0x00000001068ac08b _dispatch_worker_thread3 + 123
    14  libsystem_pthread.dylib             0x0000000106c744de _pthread_wqthread + 1129
    15  libsystem_pthread.dylib             0x0000000106c72341 start_wqthread + 13

解決辦法:添加環境變量  OS_ACTIVIITY_MODE 賦值爲disable

流程：

1. 1.選擇 Product -->Scheme-->Edit Scheme
2. 2.選擇 Arguments
3. 3.在Environment Variables添加一個環境變量 OS_ACTIVITY_MODE 設置值爲"disable"
4. 
   
5. 完美解決