loop hanging

[prz]

I have a small program that executes a command and parses the output
I can see that on many executions the program hangs.
added some debug statements and could see it is at loop iteration that we
hang
sample code 
#!/cygdrive/c/Cygwin/bin/bash
db2 list db directory | {
	while read DBREC
	do 
    [[ ! -z $DEBUG  ]] && echo "p6"     
        statements....
        [[ ! -z $DEBUG  ]] && echo "p5"         
    done
    }
the last output before hang is always p5
Any idea/hint why this is occuring ?
The executed command returns many lines.
Best Regards, Guy Przytula
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