void removeTaskEntry(String taskid) {
// taskid --> tracker
String tracker = (String) taskidToTrackerMap.remove(taskid);
// tracker --> taskid
TreeSet trackerSet = (TreeSet) trackerToTaskMap.get(tracker);
if (trackerSet != null) {
trackerSet.remove(taskid);
}
// taskid --> TIP
taskidToTIPMap.remove(taskid);
}
