Issues when splitting regions

[jiangwen w]

    The following code is from execute method in SplitTransaction class
    If the region server shut down when the following code is executing.
    Some files may be left in HDFS forever?

    this.journal.add(JournalEntry.STARTED_REGION_A_CREATION);
    HRegion a = createDaughterRegion(this.hri_a, this.parent.rsServices);

    // Ditto
    this.journal.add(JournalEntry.STARTED_REGION_B_CREATION);
    HRegion b = createDaughterRegion(this.hri_b, this.parent.rsServices);

    // Edit parent in meta
    if (!testing) {
      MetaEditor.offlineParentInMeta(server.getCatalogTracker(),
        this.parent.getRegionInfo(), a.getRegionInfo(), b.getRegionInfo());
    }