/** Remove specified regions from the file-system, using the archiver. */
private void removeHdfsRegions(final List<HRegionInfo> regions) throws IOException {
if (regions != null && regions.size() > 0) {
for (HRegionInfo hri : regions) {
HFileArchiver.archiveRegion(conf, fs, hri);
}
}
}
/**
* Remove the region from the table directory, archiving the region's hfiles.
*
* @param conf the {@link Configuration} to use
* @param fs {@link FileSystem} from which to remove the region
* @param tableDir {@link Path} to where the table is being stored
* @param regionInfo {@link HRegionInfo} for region to be deleted
* @throws IOException if the request cannot be completed
*/
public static void deleteRegionFromFileSystem(
final Configuration conf,
final FileSystem fs,
final Path tableDir,
final HRegionInfo regionInfo)
throws IOException {
HRegionFileSystem regionFs = new HRegionFileSystem(conf, fs, tableDir, regionInfo);
Path regionDir = regionFs.getRegionDir();
if (!fs.exists(regionDir)) {
LOG.warn("Trying to delete a region that do not exists on disk: " + regionDir);
return;
}
if (LOG.isDebugEnabled()) {
LOG.debug("DELETING region " + regionDir);
}
// Archive region
Path rootDir = FSUtils.getRootDir(conf);
HFileArchiver.archiveRegion(fs, rootDir, tableDir, regionDir);
// Delete empty region dir
if (!fs.delete(regionDir, true)) {
LOG.warn("Failed delete of " + regionDir);
}
}
/**
* Make sure the hbase temp directory exists and is empty.
* NOTE that this method is only executed once just after the master becomes the active one.
*/
private void checkTempDir(final Path tmpdir, final Configuration c, final FileSystem fs)
throws IOException {
// If the temp directory exists, clear the content (left over, from the previous run)
if (fs.exists(tmpdir)) {
// Archive table in temp, maybe left over from failed deletion,
// if not the cleaner will take care of them.
for (Path tabledir: FSUtils.getTableDirs(fs, tmpdir)) {
for (Path regiondir: FSUtils.getRegionDirs(fs, tabledir)) {
HFileArchiver.archiveRegion(fs, this.rootdir, tabledir, regiondir);
}
}
if (!fs.delete(tmpdir, true)) {
throw new IOException("Unable to clean the temp directory: " + tmpdir);
}
}
// Create the temp directory
if (!fs.mkdirs(tmpdir)) {
throw new IOException("HBase temp directory '" + tmpdir + "' creation failure.");
}
}
/** Removes the table from hbase:meta and archives the HDFS files. */
protected void removeTableData(final List<HRegionInfo> regions)
throws IOException, CoordinatedStateException {
try {
// 1. Remove regions from META
LOG.debug("Deleting regions from META");
MetaTableAccessor.deleteRegions(this.server.getConnection(), regions);
// -----------------------------------------------------------------------
// NOTE: At this point we still have data on disk, but nothing in hbase:meta
// if the rename below fails, hbck will report an inconsistency.
// -----------------------------------------------------------------------
// 2. Move the table in /hbase/.tmp
MasterFileSystem mfs = this.masterServices.getMasterFileSystem();
Path tempTableDir = mfs.moveTableToTemp(tableName);
// 3. Archive regions from FS (temp directory)
FileSystem fs = mfs.getFileSystem();
for (HRegionInfo hri : regions) {
LOG.debug("Archiving region " + hri.getRegionNameAsString() + " from FS");
HFileArchiver.archiveRegion(
fs,
mfs.getRootDir(),
tempTableDir,
HRegion.getRegionDir(tempTableDir, hri.getEncodedName()));
}
// 4. Delete table directory from FS (temp directory)
if (!fs.delete(tempTableDir, true)) {
LOG.error("Couldn't delete " + tempTableDir);
}
LOG.debug("Table '" + tableName + "' archived!");
} finally {
cleanupTableState();
}
}
public void deleteRegion(HRegionInfo region) throws IOException {
HFileArchiver.archiveRegion(conf, fs, region);
}