Berkeley DB Family

My Perl test program is hanging on startup sometimes. I've got the first version of all my XQueries working now (yay!) and I'm starting to do timing tests. So I open a container and perform some queries on each document in the container, then print out the elapsed time and exit.

The program does what I expect and runs to completion. Then I run it again and more often than not it runs again just the same. But sometimes it hangs apparently on the container open (strace indicates it's hanging on futex(0x410adde8, FUTEX_WAIT, 2, NULL ). If I run it again, it hangs on the environment open. If I run db_recover, my program will run successfully again. I don't have any other programs using the database.

My program is terminating normally and I haven't seen any mention of needing to call any clean up code in Perl. I guess there's something I need to do differently, but what is it?

Thanks and regards,
Dave