Program: 79769
Project: 79769
Buggy source:
/** 
 * Updates the static module instance table for the specified service in the realm.
 * @param realm The realm in which the operation is processed.
 * @param serviceName the service for which the table is built.
 */
public static synchronized void buildModuleInstanceForService(String realm,String serviceName){
  if (DEBUG.messageEnabled()) {
    DEBUG.message("String_Node_Str" + MODULE_INSTANCE_TABLE + "String_Node_Str"+ realm+ "String_Node_Str"+ serviceName);
  }
  try {
    String moduleName=getModuleName(serviceName);
    if (DEBUG.messageEnabled()) {
      DEBUG.message("String_Node_Str" + moduleName);
    }
    if ((moduleName != null) && (moduleName.length() != 0)) {
      ServiceConfigManager scm=new ServiceConfigManager(serviceName,getAdminToken());
      ServiceConfig config=scm.getOrganizationConfig(realm,null);
      if (config == null) {
        if (DEBUG.messageEnabled()) {
          DEBUG.message("String_Node_Str" + "String_Node_Str" + serviceName + "String_Node_Str"+ realm);
        }
      }
      realm=com.sun.identity.sm.DNMapper.orgNameToDN(realm);
synchronized (MODULE_INSTANCE_TABLE) {
        Map<String,Set<String>> moduleMap=MODULE_INSTANCE_TABLE.remove(realm);
        if (moduleMap != null) {
          Map<String,Set<String>> newMap=new HashMap<String,Set<String>>(moduleMap);
          newMap.remove(moduleName);
          moduleMap=newMap;
        }
        Set<String> instanceSet=new HashSet<String>();
        Map<String,Set<String>> defaultAttrs=null;
        if (config != null) {
          defaultAttrs=config.getAttributesWithoutDefaults();
        }
        if (defaultAttrs != null && !defaultAttrs.isEmpty()) {
          instanceSet.add(moduleName);
        }
        Set<String> instances=null;
        if (config != null) {
          instances=config.getSubConfigNames();
        }
        if (instances != null) {
          instanceSet.addAll(instances);
        }
        if (!instanceSet.isEmpty()) {
          if (moduleMap == null) {
            moduleMap=new HashMap<String,Set<String>>();
          }
          moduleMap.put(moduleName,instanceSet);
        }
        if (moduleMap != null && !moduleMap.isEmpty()) {
          MODULE_INSTANCE_TABLE.put(realm,moduleMap);
        }
      }
    }
  }
 catch (  Exception e) {
    if (DEBUG.messageEnabled()) {
      DEBUG.message("String_Node_Str",e);
    }
  }
  if (DEBUG.messageEnabled()) {
    DEBUG.message("String_Node_Str" + MODULE_INSTANCE_TABLE);
  }
}

Fixed version (ground truth):
/** 
 * Updates the static module instance table for the specified service in the realm.
 * @param realm The realm in which the operation is processed.
 * @param serviceName the service for which the table is built.
 */
private static synchronized void buildModuleInstanceForService(String realm,String serviceName){
  if (DEBUG.messageEnabled()) {
    DEBUG.message("String_Node_Str" + MODULE_INSTANCE_TABLE + "String_Node_Str"+ realm+ "String_Node_Str"+ serviceName);
  }
  try {
    String moduleName=getModuleName(serviceName);
    if (DEBUG.messageEnabled()) {
      DEBUG.message("String_Node_Str" + moduleName);
    }
    if ((moduleName != null) && (moduleName.length() != 0)) {
      ServiceConfigManager scm=new ServiceConfigManager(serviceName,getAdminToken());
      ServiceConfig config=scm.getOrganizationConfig(realm,null);
      if (config == null) {
        if (DEBUG.messageEnabled()) {
          DEBUG.message("String_Node_Str" + "String_Node_Str" + serviceName + "String_Node_Str"+ realm);
        }
      }
      realm=com.sun.identity.sm.DNMapper.orgNameToDN(realm);
synchronized (MODULE_INSTANCE_TABLE) {
        Map<String,Set<String>> moduleMap=MODULE_INSTANCE_TABLE.remove(realm);
        if (moduleMap != null) {
          Map<String,Set<String>> newMap=new HashMap<String,Set<String>>(moduleMap);
          newMap.remove(moduleName);
          moduleMap=newMap;
        }
        Set<String> instanceSet=new HashSet<String>();
        Map<String,Set<String>> defaultAttrs=null;
        if (config != null) {
          defaultAttrs=config.getAttributesWithoutDefaults();
        }
        if (defaultAttrs != null && !defaultAttrs.isEmpty()) {
          instanceSet.add(moduleName);
        }
        Set<String> instances=null;
        if (config != null) {
          instances=config.getSubConfigNames();
        }
        if (instances != null) {
          instanceSet.addAll(instances);
        }
        if (!instanceSet.isEmpty()) {
          if (moduleMap == null) {
            moduleMap=new HashMap<String,Set<String>>();
          }
          moduleMap.put(moduleName,instanceSet);
        }
        if (moduleMap != null && !moduleMap.isEmpty()) {
          MODULE_INSTANCE_TABLE.put(realm,moduleMap);
        }
      }
    }
  }
 catch (  Exception e) {
    if (DEBUG.messageEnabled()) {
      DEBUG.message("String_Node_Str",e);
    }
  }
  if (DEBUG.messageEnabled()) {
    DEBUG.message("String_Node_Str" + MODULE_INSTANCE_TABLE);
  }
}