JobClient creates submitJobDir with SYSTEM_DIR_PERMISSION ( rwx-wx-wx)

JobClient creates submitJobDir with SYSTEM_DIR_PERMISSION ( rwx-wx-wx ) which causes problem while sharing a cluster.
Consider the case where userA starts jobtracker/tasktrackers and userB submits a job to this cluster. When userB creates submitJobDir it is created with rwx-wx-wx which cannot be read by tasktracker started by userA