Here are the three easiest ways to fix Java’s “not recognized as an internal or external command” error: Install or reinstall Java and the JDK on your computer Add Java’s bin directory to the computer ...

3] End the MSIEXEC.EXE service. If the above-listed methods did not help you fix the issue, you can try terminating the MSIEXEC.EXE service. Many users have found this method useful.

If you accidentally delete the persistence.xml file, then it’s definitely not going to be found at runtime. If the file has gone missing, check your git repository and perform a restore. You need that ...

In order to run a Java application, a JVM must load compiled .class files into a context, such as a server, where they can be accessed. A JVM depends on its class loader to perform this function.