When set mxosrvr logging to INFO, hostname is null.
SQL>select * from udf(event_log_reader('f')) where severity='INFO' and component='MXOSRVR' and message like '%hostname =%';
LOG_TS SEVERITY COMPONENT NODE_NUMBER CPU PIN PROCESS_NAME SQL_CODE QUERY_ID MESSAGE LOG_FILE_NODE LOG_FILE_NAME LOG_FILE_LINE PARSE_STATUS
-------------------------- ---------- ------------------------ ----------- ----------- ----------- ------------ ----------- -------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- ------------- -------------------------------------------------------------------------------------------------------------------------------- ------------- ------------
2015-01-29 06:18:49.329000 INFO MXOSRVR 2 2 29808 $Z020PBN NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.71, hostname = . 0 master_exec_2_29808.log 13
2015-01-29 06:18:49.328000 INFO MXOSRVR 4 4 26779 $Z040LV4 NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.73, hostname = . 0 master_exec_4_26779.log 13
2015-01-29 06:18:49.224000 INFO MXOSRVR 3 3 14190 $Z030BKF NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.72, hostname = . 0 master_exec_3_14190.log 13
2015-01-29 06:18:49.256000 INFO MXOSRVR 5 5 2066 $Z0501P1 NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.74, hostname = . 0 master_exec_5_2066.log 13
2015-01-29 06:18:48.987000 INFO MXOSRVR 1 1 2577 $Z01023M NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.108, hostname = . 0 master_exec_1_2577.log 16
2015-01-29 06:18:48.913000 INFO MXOSRVR 1 1 2562 $Z010237 NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.108, hostname = . 0 master_exec_1_2562.log 13
2015-01-29 06:18:48.879000 INFO MXOSRVR 0 0 23865 $Z000JGV NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.107, hostname = . 0 master_exec_0_23865.log 13
2015-01-29 06:18:48.893000 INFO MXOSRVR 0 0 23871 $Z000JH1 NULL NULL MX Connectivity Service starting parameters: Server: IPaddr = 15.25.119.107, hostname = . 0 master_exec_0_23871.log 16
