Extreme Java

I got this error while connecting to MQSeries:

MQJE001: An MQException occurred: Completion Code 2, Reason 2009
MQJE016: MQ queue manager closed channel immediately during connect
Closure reason = 2009

After some trial-and-error, I found the problem: MQ’s InitialContext opens a connection, but only closes it if I close the IC itself:

ic.close();

Since my application creates a lot of instances of InitialContext, a lot of connections got leaked, giving that annoying error.

+1 to the IBM’s hall-of-shame, section “useless error messages”.