Known problem on AIX DB2 Version 7.1 if there are multiple processors. A workaround does exist: db2set [-i instance name or -g] DB2TCPCONNMGRS=1
If the problem is occurring on AIX, please obtain AIX APAR IY17704.
Multiple connection manager processes are trying to be created to listen for incoming connections on the defined TCP ports. This is being done to split the work of allocating agents and ports for incoming connections. However, it is causing problems with DB2 if there are multiple processors. The workaround forces all connection requests to be funneled through a single process instead of the default (which is based off the square root of the number of processors rounded up).