Stable Queue Manager (SQM) attempted to awaken a Distributor thread that is actually up.
This error message is reported in the Replication Server error log:
E. 2011/03/28 06:27:44. ERROR #8040 SQM(163:0 TRADEDS.tradedb) - tr/mdext.c(2066) MD failed to wake someone waiting for flush from source=TRADE_REP.