/** Merge image and edits, and verify consistency with the signature. */
private void doMerge(CheckpointSignature sig, boolean loadImage) throws IOException {
getEditLog().open();
StorageDirectory sdName = null;
StorageDirectory sdEdits = null;
Iterator<StorageDirectory> it = null;
if (loadImage) {
it = dirIterator(NameNodeDirType.IMAGE);
if (it.hasNext()) sdName = it.next();
if (sdName == null) throw new IOException("Could not locate checkpoint fsimage");
}
it = dirIterator(NameNodeDirType.EDITS);
if (it.hasNext()) sdEdits = it.next();
if (sdEdits == null) throw new IOException("Could not locate checkpoint edits");
if (loadImage) {
loadFSImage(FSImage.getImageFile(sdName, NameNodeFile.IMAGE));
}
loadFSEdits(sdEdits);
sig.validateStorageInfo(this);
saveNamespace(false);
}
