Program: 104003
Project: 104003
Buggy source:
public SipStackProperties(){
  super();
  String logDir=SipActivator.getConfigurationService().getScHomeDirLocation() + System.getProperty("String_Node_Str") + SipActivator.getConfigurationService().getScHomeDirName()+ System.getProperty("String_Node_Str");
  if (!NSPVALUE_DEBUG_LOG.startsWith(logDir))   NSPVALUE_DEBUG_LOG=logDir + NSPVALUE_DEBUG_LOG;
  if (!NSPVALUE_SERVER_LOG.startsWith(logDir))   NSPVALUE_SERVER_LOG=logDir + NSPVALUE_SERVER_LOG;
  this.setProperty(JSPNAME_STACK_NAME,"String_Node_Str");
  this.setProperty(NSPNAME_DEBUG_LOG,NSPVALUE_DEBUG_LOG);
  this.setProperty(NSPNAME_DEBUG_LOG_OVERWRITE,NSPVALUE_DEBUG_LOG_OVERWRITE);
  this.setProperty(NSPNAME_SERVER_LOG_OVERWRITE,NSPVALUE_SERVER_LOG_OVERWRITE);
  this.setProperty(NSPNAME_CACHE_CLIENT_CONNECTIONS,NSPVALUE_CACHE_CLIENT_CONNECTIONS);
  this.setProperty(NSPNAME_DELIVER_UNSOLICITED_NOTIFY,NSPVALUE_DELIVER_UNSOLICITED_NOTIFY);
  this.setProperty(NSPNAME_USE_ROUTER_FOR_ALL_URIS,NSPVALUE_USE_ROUTER_FOR_ALL_URIS);
  this.setProperty(NSPNAME_ROUTER_PATH,NSPVALUE_ROUTER_PATH);
  System.setProperty("String_Node_Str","String_Node_Str");
  String logLevel=LogManager.getLogManager().getProperty("String_Node_Str");
  String jainSipTraceLevel=null;
  if (logLevel == null) {
    jainSipTraceLevel=NSPVALUE_DEFAULT_TRACE_LEVEL;
  }
 else   if (logLevel.equals(Level.FINEST.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.FINER.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.FINE.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.WARNING.getName()) || logLevel.equals(Level.SEVERE.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.OFF)) {
    jainSipTraceLevel="String_Node_Str";
  }
 else {
    jainSipTraceLevel=logLevel;
  }
  this.setProperty(NSPNAME_TRACE_LEVEL,jainSipTraceLevel);
}

Fixed version (ground truth):
public SipStackProperties(){
  super();
  String logDir=SipActivator.getConfigurationService().getScHomeDirLocation() + System.getProperty("String_Node_Str") + SipActivator.getConfigurationService().getScHomeDirName()+ System.getProperty("String_Node_Str");
  if (!NSPVALUE_DEBUG_LOG.startsWith(logDir))   NSPVALUE_DEBUG_LOG=logDir + NSPVALUE_DEBUG_LOG;
  if (!NSPVALUE_SERVER_LOG.startsWith(logDir))   NSPVALUE_SERVER_LOG=logDir + NSPVALUE_SERVER_LOG;
  this.setProperty(JSPNAME_STACK_NAME,"String_Node_Str");
  this.setProperty(NSPNAME_DEBUG_LOG,NSPVALUE_DEBUG_LOG);
  this.setProperty(NSPNAME_DEBUG_LOG_OVERWRITE,NSPVALUE_DEBUG_LOG_OVERWRITE);
  this.setProperty(NSPNAME_SERVER_LOG_OVERWRITE,NSPVALUE_SERVER_LOG_OVERWRITE);
  this.setProperty(NSPNAME_CACHE_CLIENT_CONNECTIONS,NSPVALUE_CACHE_CLIENT_CONNECTIONS);
  this.setProperty(NSPNAME_DELIVER_UNSOLICITED_NOTIFY,NSPVALUE_DELIVER_UNSOLICITED_NOTIFY);
  this.setProperty(NSPNAME_USE_ROUTER_FOR_ALL_URIS,NSPVALUE_USE_ROUTER_FOR_ALL_URIS);
  this.setProperty(NSPNAME_ROUTER_PATH,NSPVALUE_ROUTER_PATH);
  System.setProperty("String_Node_Str","String_Node_Str");
  String logLevel=LogManager.getLogManager().getProperty("String_Node_Str");
  String jainSipTraceLevel=null;
  if (logLevel == null) {
    jainSipTraceLevel=NSPVALUE_DEFAULT_TRACE_LEVEL;
  }
 else   if (logLevel.equals(Level.FINEST.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.FINER.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.FINE.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.WARNING.getName()) || logLevel.equals(Level.SEVERE.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else   if (logLevel.equals(Level.OFF.getName())) {
    jainSipTraceLevel="String_Node_Str";
  }
 else {
    jainSipTraceLevel=logLevel;
  }
  this.setProperty(NSPNAME_TRACE_LEVEL,jainSipTraceLevel);
}