I am working on a project where I need to install the Spring Boot application Pet Clinic onto an Ubuntu 22 server using SSM Documents. I have attached the Systems Manager Run Document. The error below comes from the command sudo journalctl -u spring-petclinic.service. I tried giving any and all access, running as root, and it still isn't working.
Any idea on how to get this application to stay running?
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Failed with result 'exit-code'.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Scheduled restart job, restart counter is at 3.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: Stopped Spring PetClinic Application.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: Started Spring PetClinic Application.
May 17 21:52:36 ip-10-0-4-141 java[7076]: Error: Unable to access jarfile /clinic/spring-petclinic/target/*.jar
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Main process exited, code=exited, status=1/FAILURE
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Failed with result 'exit-code'.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Scheduled restart job, restart counter is at 4.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: Stopped Spring PetClinic Application.
May 17 21:52:36 ip-10-0-4-141 systemd[1]: Started Spring PetClinic Application.
May 17 21:52:36 ip-10-0-4-141 java[7077]: Error: Unable to access jarfile /clinic/spring-petclinic/target/*.jar
May 17 21:52:36 ip-10-0-4-141 systemd[1]: spring-petclinic.service: Main process exited, code=exited, status=1/FA
---
schemaVersion: '2.2'
description: Install Java 17 and run the Spring PetClinic application
parameters: {}
mainSteps:
- name: InstallJava17
action: aws:runShellScript
inputs:
runCommand:
- |
#!/bin/bash
# Check if Java is installed
if java -version > /dev/null 2>&1; then
echo "Java is installed. No need to restart"
else
echo "Java is not installed. Restarting after install...."
# Update package lists
sudo apt-get update
# Install OpenJDK 17
sudo apt-get install -y openjdk-17-jdk
# Verify Java installation
java -version
exit 194
fi
- name: DownloadApplication
action: aws:runShellScript
inputs:
runCommand:
- |
#!/bin/bash
# clean the environment file
cat /dev/null > /etc/environment
# set the full path
echo "PATH=\"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:\$JAVA_HOME/bin\"" | sudo tee -a /etc/environment
# grab the java home and set it in the environment
JAVA_HOME=$(sudo update-alternatives --config java | grep -o -E '/usr/lib/jvm/[a-zA-Z0-9-]+')
echo "JAVA_HOME=\"$JAVA_HOME\"" | sudo tee -a /etc/environment
# update the variables
source /etc/environment
echo "whoami?"
sudo whoami
# Create and move into new folder
sudo mkdir /clinic
cd /clinic
# Download the repository
echo "# Download the repository"
sudo git clone https://github.com/spring-projects/spring-petclinic.git
# Move into the folder
echo "# Move into the folder"
cd spring-petclinic
# Start the Maven build
echo "# Start the Maven build"
./mvnw package
- name: CreateSystemdService
action: aws:runShellScript
inputs:
runCommand:
- |
#!/bin/bash
# clean the environment file
cat /dev/null > /etc/environment
# set the full path
echo "PATH=\"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:\$JAVA_HOME/bin\"" | sudo tee -a /etc/environment
# grab the java home and set it in the environment
JAVA_HOME=$(sudo update-alternatives --config java | grep -o -E '/usr/lib/jvm/[a-zA-Z0-9-]+')
echo "JAVA_HOME=\"$JAVA_HOME\"" | sudo tee -a /etc/environment
# update the variables
source /etc/environment
# Create systemd service unit
echo "# Create systemd service unit"
sudo tee /etc/systemd/system/spring-petclinic.service <<EOF
[Unit]
Description=Spring PetClinic Application
After=network.target
echo "THIS IS THE PATH"
echo $PATH
echo "THIS IS THE JAVA_HOME"
echo $JAVA_HOME
[Service]
ExecStart=/usr/lib/jvm/java-17-openjdk-amd64/bin/java -jar /clinic/spring-petclinic/target/*.jar
Restart=always
User=root
[Install]
WantedBy=multi-user.target
EOF
echo "whoami?"
sudo whoami
# Reload systemd and start the service
echo "# Reload systemd and start the service"
echo "whoami?"
sudo whoami
echo "daemon is reloading"
sudo systemctl daemon-reload
echo "whoami?"
sudo whoami
echo "enabling spring-petclinic"
sudo systemctl enable spring-petclinic
echo "whoami?"
sudo whoami
echo "starting spring-petclinic"
sudo systemctl start spring-petclinic
I think the problems are in this line:
ExecStart=/usr/lib/jvm/java-17-openjdk-amd64/bin/java
-jar /clinic/spring-petclinic/target/*.jar
(I have split it for readability.)
Lets start with:
java -jar /clinic/spring-petclinic/target/*.jar
The -jar option requires one JAR file. But on the face of it, the * could expand to pathnames for multiple JARs. That doesn't work. The second and subsequent JARs would be passed as command line arguments; i.e. in the "arg list". And they wouldn't be on the classpath.
Furthermore, if your application does consist of multiple JAR files, the -jar option is not the correct way to run it. Instead, you need to specify a classpath (e.g. using a -cp argument) and give the entrypoint classname. It would looks something like this:
java -cp /somepath/part1.jar:/somepath/part2.jar com.example.FooCommand ...
(It is also possible to use wildcards in the classpath, but there is a java specific syntax for doing that. Check the java command manual entry for your version of Java.)
But the actual explanation is simpler than that. The file you have there is a systemd unit configuration file; see https://www.freedesktop.org/software/systemd/man/255/systemd.service.html. The manual entry explains that an ExecStart string is NOT full shell syntax. Some aspects of shell syntax are supported, but * wildcards are NOT supported. (Refer to the systemd.service manual entry for details.)
Therefore ... the ExecStart you have specified is specifying a JAR file with a literal * character in its pathname. Apparently, it doesn't exist; the java command error message is telling you that.