}
@Override
protected void handleTableOperation(List<HRegionInfo> regions)
throws IOException, KeeperException {
MasterCoprocessorHost cpHost = ((HMaster) this.server)
.getCoprocessorHost();
if (cpHost != null) {
cpHost.preDeleteTableHandler(this.tableName);
}
// 1. Wait because of region in transition
AssignmentManager am = this.masterServices.getAssignmentManager();
RegionStates states = am.getRegionStates();
long waitTime = server.getConfiguration().
getLong("hbase.master.wait.on.region", 5 * 60 * 1000);
for (HRegionInfo region : regions) {
long done = System.currentTimeMillis() + waitTime;
while (System.currentTimeMillis() < done) {
if (states.isRegionFailedToOpen(region)) {
am.regionOffline(region);
}
if (!states.isRegionInTransition(region)) break;
Threads.sleep(waitingTimeForEvents);
LOG.debug("Waiting on region to clear regions in transition; "
+ am.getRegionStates().getRegionTransitionState(region));
}
if (states.isRegionInTransition(region)) {
throw new IOException("Waited hbase.master.wait.on.region (" +
waitTime + "ms) for region to leave region " +
region.getRegionNameAsString() + " in transitions");
}
}
// 2. Remove regions from META
LOG.debug("Deleting regions from META");
MetaEditor.deleteRegions(this.server.getCatalogTracker(), regions);
// 3. Move the table in /hbase/.tmp
MasterFileSystem mfs = this.masterServices.getMasterFileSystem();
Path tempTableDir = mfs.moveTableToTemp(tableName);
try {
// 4. Delete 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, new Path(tempTableDir, hri.getEncodedName()));
}
// 5. Delete table from FS (temp directory)
if (!fs.delete(tempTableDir, true)) {
LOG.error("Couldn't delete " + tempTableDir);
}
LOG.debug("Table '" + Bytes.toString(tableName) + "' archived!");
} finally {
String tableNameStr = Bytes.toString(tableName);
// 6. Update table descriptor cache
LOG.debug("Removing '" + tableNameStr + "' descriptor.");
this.masterServices.getTableDescriptors().remove(Bytes.toString(tableName));
// 7. If entry for this table in zk, and up in AssignmentManager, remove it.
LOG.debug("Marking '" + tableNameStr + "' as deleted.");
am.getZKTable().setDeletedTable(tableNameStr);
}
if (cpHost != null) {
cpHost.postDeleteTableHandler(this.tableName);
}
}