Could replacing a bash script with a new version cause a running instance of the script to fail

Question

I am running bash scripts from java programs on a server. I just uploaded a new version of the script intending the next run of the script to use the version. I did not mean

Answer 1

I'm not sure if things have changed since mob's answer, which has been accepted, but in bash 4.3.46 (such as comes with ubuntu 16.04), it is true that bash monitors the script file for changes, but this is broken if the file is deleted.

So a slight modification to his script does the 'right' thing:

# If you modify a script, will it change the behavior of
# processes that are currently running that script?
# Does this script print "Foo" or "Bar"?

cat >foo.sh <foo.sh <

This now prints Foo.