382184ms th_a       main.cpp:126                  main                 ] Writing new config file at /home/bitshares-core/witness_node_data_dir/config.ini
382201ms th_a       witness.cpp:88                plugin_initialize    ] witness plugin:  plugin_initialize() begin
382202ms th_a       witness.cpp:99                plugin_initialize    ] Public Key: BTS6MRyAjQq8ud7hVNYcfnVPJqcVpscN5So8BhtHuGYqET5GDW5CV
382202ms th_a       witness.cpp:117               plugin_initialize    ] witness plugin:  plugin_initialize() end
382203ms th_a       application.cpp:441           startup              ] Replaying blockchain due to: db_version file not found
382203ms th_a       application.cpp:330           operator()           ] Initializing database...
394151ms th_a       db_management.cpp:51          reindex              ] reindexing blockchain
394154ms th_a       db_management.cpp:104         wipe                 ] Wiping database
394162ms th_a       db_management.cpp:170         close                ] Database close unexpected exception: {"code":10,"name":"assert_exception","message":"Assert Exception","stack":[{"context":{"level":"error","file":"index.hpp","line":111,"method":"get","hostname":"","thread_name":"th_a","timestamp":"2017-07-04T04:06:34"},"format":"maybe_found != nullptr: Unable to find Object","data":{"id":"2.1.0"}}]}
394214ms th_a       object_database.cpp:87        wipe                 ] Wiping object database...
394214ms th_a       object_database.cpp:89        wipe                 ] Done wiping object databse.
394214ms th_a       object_database.cpp:94        open                 ] Opening object database from /home/bitshares-core/witness_node_data_dir/blockchain ...
394215ms th_a       object_database.cpp:100       open                 ] Done opening object database.
406459ms th_a       db_debug.cpp:85               debug_dump           ] total_balances[asset_id_type()].value: 12205723874026 core_asset_data.current_supply.value: 253409943611989
406468ms th_a       db_management.cpp:58          reindex              ] !no last block
406468ms th_a       db_management.cpp:59          reindex              ] last_block: 
406552ms th_a       application.cpp:480           startup              ] 0 exception: unspecified
Unable to generate EC key
    {}
    p2p  elliptic_common.cpp:222 generate

    {}
    th_a  application.cpp:210 reset_p2p_node
406552ms th_a       application.cpp:1024          startup              ] 0 exception: unspecified
Unable to generate EC key
    {}
    p2p  elliptic_common.cpp:222 generate

    {}
    th_a  application.cpp:210 reset_p2p_node
rethrow
    {}
    th_a  application.cpp:480 startup
406552ms th_a       main.cpp:195                  main                 ] Exiting with error:
0 exception: unspecified
Unable to generate EC key
    {}
    p2p  elliptic_common.cpp:222 generate

    {}
    th_a  application.cpp:210 reset_p2p_node
rethrow
    {}
    th_a  application.cpp:480 startup
406555ms p2p        peer_database.cpp:133         close                ] error saving peer database to file
406855ms p2p        peer_database.cpp:133         close                ] error saving peer database to file
406855ms p2p        peer_database.cpp:133         close                ] error saving peer database to file

I has compiled on centos ,but run ./programs/witness_node/witness_node  is error

I can't use yam in centos5 ,the error info is kernel is too old.