public Path getTempTableSpace() {
    Preconditions.checkNotNull(this.hdfsTmpTableSpace,
        "Temp table path expected to be non-null");
    return this.hdfsTmpTableSpace;
  }
Create a given path if it doesn't exist.

@param conf
@param path
@param permission
@param isLocal
@param isCleanUp
@return
@throws IOException
ql/src/java/org/apache/hadoop/hive/ql/session/SessionState.java