Upstart service in start/killed state - bash

Question

I have a python application that needs to run as a service on Ubuntu 14.04. This application needs to have the following capabilities:
When then service is started, a cron entry is created in the crontab, which will periodically run the application.
When the service is stopped, the crontab entry is removed.
When the system/server is rebooted, the service needs to be started.
I have the following upstart script to run my service:
start on [2345]
stop on [!2345]
script
LOGDIR=/usr/local/etc/myservice/logs/
CFGFILE=/usr/local/etc/myservice/myservice.conf
echo $$ > /var/run/myservice.pid
# If there is no cronjob by the name myservice, then add a cronjob to the crontab
set -x
exec bash -c '
if (( $(crontab -l | grep -c myservice) == 0 )); then
(crontab -l ; echo "1 * * * * myservice) | crontab -
fi'
end script
pre-start script
set -x
echo "[`date`] Starting myservice Service" >> /var/log/myservice.log
# Testing to see if myservice has been installed, else exit
[ -x /usr/local/bin/myservice ] || exit 0
mkdir -p /usr/local/etc/myservice/logs/
end script
pre-stop script
set -x
echo "[`date`] Stopping myservice Service" >> /var/log/myservice.log
end script
post-stop script
set -x
rm /var/run/myservice.pid
# If there is at least 1 cronjob by the name myservice, remove all such entries from crontab
exec bash -c '
if (( $(crontab -l | grep -c myservice) >= 0 )); then
(crontab -l | grep -v myservice) | crontab -
fi'
pkill -f myservice
end script
However, when I try to run the service, it hangs and I have to hit ctrl+c to get back the command line. Similarly with the stopping of the service. Am I missing something here? Any help will be appreciated!