Upgrade from 6.4.0 to 6.4.2 failed with error:
./upgrade.sh: line 85: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64/bin/java: No such file or directory
Release : 6.4.0
Component :
It appeared to be an issue with the wrong JAVA_HOME variable.
Advised for them to verify the java path was correct and they were able to move past this error.
Verify JAVA_HOME is set correctly by checking
echo $JAVA_HOME
java -version
ls -l /usr/lib/jvm/
Once set correctly