About DAGAppMaster working directory

[Chen He]

In the DAGAppMaster ServiceInit() method, If user runs in session mode.
DAGAM will load localResource into sessionResources. Here are the code

if (isSession) {
        FileInputStream sessionResourcesStream = null;
        try {
          sessionResourcesStream = new FileInputStream(
              TezConfiguration.TEZ_SESSION_LOCAL_RESOURCES_PB_FILE_NAME);
          PlanLocalResourcesProto localResourcesProto =
              PlanLocalResourcesProto.parseFrom(sessionResourcesStream);

sessionResources.putAll(DagTypeConverters.convertFromPlanLocalResources(
              localResourcesProto));
        } finally {
          if (sessionResourcesStream != null) {
            sessionResourcesStream.close();
          }
        }
    }

However, TezConfiguration.TEZ_SESSION_LOCAL_RESOURCES_PB_FILE_NAME is just
a string. It must specify the relative path. Anyone know where can I get
the absolute path?

Regards!

Chen