How to run commads from Spring boot webapp - spring

Question

I have Spring boot web application where I want to call some commands in command line. When I use ProcessBuilder and Process class after I run the process, ExecutorService is shut down.
Method where I run the process:
public void runTestsInProject(String projectPath){
System.out.println("Starting runTestsInProject() ------");
try{
ProcessBuilder builder = new ProcessBuilder(
"cmd.exe", "/c", "cd \"" + projectPath + "\" && mvn clean test");
builder.redirectErrorStream(true);
Process p = builder.start();
BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line;
while (true) {
line = r.readLine();
if (line == null) { break; }
}
} catch (IOException e){e.printStackTrace();}
}
Error log:
2020-07-27 20:33:20.246 INFO 7248 --- [ Thread-4] o.s.s.concurrent.ThreadPoolTaskExecutor : Shutting down ExecutorService 'applicationTaskExecutor'
2020-07-27 20:33:20.250 INFO 7248 --- [ Thread-4] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2020-07-27 20:33:20.254 INFO 7248 --- [ Thread-4] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...
2020-07-27 20:33:20.270 INFO 7248 --- [ Thread-4] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.
Spring starts again ...
2020-07-27 20:33:29.778 INFO 7248 --- [nio-8080-exec-9] o.a.c.loader.WebappClassLoaderBase : Illegal access: this web application instance has been stopped already. Could not load [META-INF/services/javax.xml.bind.JAXBContext]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [META-INF/services/javax.xml.bind.JAXBContext]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.

Answer 1

You probably have added spring-boot-devtools in your dependencies. Devtools restarts the application whenever it finds a change in the classpath of the project.
The process you are running(mvn-clean) is causing a change in the classpath of the project and hence your application is restarting.
If you run ordinary processes that don't interfere with the project's classpath, you will not face the restart or executor shutdown problem.
Look at this snapshot from spring dev tools documentation:
As DevTools monitors classpath resources, the only way to trigger a restart is to update the classpath. The way in which you cause the classpath to be updated depends on the IDE that you are using. In Eclipse, saving a modified file will cause the classpath to be updated and trigger a restart. In IntelliJ IDEA, building the project (Build -> Build Project) will have the same effect.

Answer 2

1) First problem is in command
ProcessBuilder builder = new ProcessBuilder(
"cmd.exe", "/c", "c: && cd \"" + projectPath + "\" && mvn clean test");
instead of
ProcessBuilder builder = new ProcessBuilder(
"cmd.exe", "/c", "cd \"" + projectPath + "\" && mvn clean test");
Windows cmd propably is not always at the same starting point, so when cmd is started and points on D: disc and your command si for example cd C:\smt\doc is pointing then it doesnt work. So it needs to be sayed on which disc to operate at the beginning of the command.
2) Second problem could be that maven used by IDE to build and run the application is being shut down by maven command that I make by ProcessBuilder. So the solution is to build the application jar file and run it from cmd.