Making getInstance call synchronized in order to avoid any problems with multiple threads using it

java/com.sap.sailing.monitoring/src/com/sap/sailing/monitoring/sysinfo/SystemInformationImpl.java

@@ -29,7 +29,7 @@ public class SystemInformationImpl implements SystemInformation {
     private long allocated_tcp_connections = -1;
     private long used_tcp_connections = -1;
     
-    public static SystemInformation getInstance() {
+    public synchronized static SystemInformation getInstance() {
         if (singleton == null)
             singleton = new SystemInformationImpl();
         return singleton;