- the 100% cpu was from forever running user programs ... p.waitFor won't kill the process!!

src/Main.java

@@ -133,13 +133,8 @@ public class Main {
     static String DefaultCGroupName = "syndrom";
 
 
-
-
     public static void main(String[] myArgs) throws IOException {
 
-
-
-
         if (isDebug) {
             System.out.println(Arrays.toString(myArgs));
         }
@@ -437,7 +432,6 @@ public class Main {
             }
         }
 
-
         List<String> cmdToEx = transformCommandWithSpecialStrings(directoryFile, mainFile,
                 mainFileNameWithExtension, executeTestCmd, timeoutInMs, memoryLimitInKb, diskLimitInKb,
                 sourceFileExtensionsWithoutDot);
@@ -452,7 +446,6 @@ public class Main {
             cmdToEx.addAll(_arguments);
         }
 
-
         if (isDebug) {
             System.out.println(Arrays.toString(cmdToEx.toArray()));
         }
@@ -695,6 +688,12 @@ public class Main {
             futureResult = -100;
         }
 
+
+        //p.waitFor will NOT TERMINATE the process in any way...
+        //... so finally kill the process (if it's not already finished)
+        //else an infinitely loop would run forever
+        p.destroy();
+
         if (isDebug) {
             timer.end();
             System.out.println("time for running process in ms :"  + timer.getTotalTimeInMs());