pq_flush: send() failed: Broken pipe

I just upgraded from 7.2 to 7.3.1.  I have a cron job that runs each night, doing vaccum and analyze, and it was running just fine untill the upgrade. 

I can run these commands just fine from the command line as both the root and postgres users, but in my cron job it spits out the error "pq_flush: send() failed: Broken pipe".

 

What could I be doing wrong?

Thanks

Chad

 

Here are the commands

0 23 * * *      psql mydb -U postgres -c "vacuum full;"
0 0 * * *      psql mydb -U postgres -c "analyse;"