Spring boot on openshift 503 Service Temporarily Unavailable - spring

Question

I want to deploy Spring boot App on openshift
I've
.openshift/action_hooks/deploy file as
#!/bin/bash
set -x
if [ ! -d $OPENSHIFT_DATA_DIR/m2/repository ]
then
mkdir -p $OPENSHIFT_DATA_DIR/m2/repository
fi
if [ ! -d $OPENSHIFT_DATA_DIR/logs ]
then
mkdir -p $OPENSHIFT_DATA_DIR/logs
fi
if [ ! -d $OPENSHIFT_DATA_DIR/apache-maven-3.3.9 ]
then
wget -P $OPENSHIFT_DATA_DIR http://mirror.cc.columbia.edu/pub/software/apache/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz
tar xvf $OPENSHIFT_DATA_DIR/apache-maven*.tar.gz --directory $OPENSHIFT_DATA_DIR
rm -f $OPENSHIFT_DATA_DIR/apache-maven*.tar.gz
fi
export JAVA_HOME=/etc/alternatives/java_sdk_1.8.0
export M2=$OPENSHIFT_DATA_DIR/apache-maven-3.3.9/bin
export MAVEN_OPTS="-Xms384m -Xmx412m"
export PATH=$JAVA_HOME/bin:$PATH
cd $OPENSHIFT_REPO_DIR
$M2/mvn --version
$M2/mvn -s settings.xml clean install
# if you get error then un comment the following line
#$M2/mvn -s settings.xml package
nohup java -Xms384m -Xmx412m -jar target/*.jar --server.port=${OPENSHIFT_DIY_PORT} --server.address=${OPENSHIFT_DIY_IP} --spring.profiles.active=openshift &
and .openshift/action_hooks/start file as
#!/bin/bash
source $OPENSHIFT_CARTRIDGE_SDK_BASH
set -x
export JAVA_HOME=/etc/alternatives/java_sdk_1.8.0
export PATH=$JAVA_HOME/bin:$PATH
cd $OPENSHIFT_REPO_DIR
nohup java -Xms384m -Xmx412m -jar target/*.jar --server.port=${OPENSHIFT_DIY_PORT} --server.address=${OPENSHIFT_DIY_IP} --spring.profiles.active=openshift &
and .openshift/action_hooks/stop file as
#!/bin/bash
source $OPENSHIFT_CARTRIDGE_SDK_BASH
# The logic to stop your application should be put in this script.
if [ -z "$(ps -ef | grep testrubyserver.rb | grep -v grep)" ]
then
client_result "Application is already stopped"
else
kill `ps -ef | grep testrubyserver.rb | grep -v grep | awk '{ print $2 }'` > /dev/null 2>&1
fi
after deploying to openshift I get
Service Temporarily Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.
Apache/2.2.15 (Red Hat) Server at myapp-mydomain.rhcloud.com Port 80
how to resolve this problem???