/**
* @param snapshot descriptor of the snapshot to take
* @param masterServices master services provider
*/
public TakeSnapshotHandler(SnapshotDescription snapshot, final MasterServices masterServices) {
super(masterServices, EventType.C_M_SNAPSHOT_TABLE);
assert snapshot != null : "SnapshotDescription must not be nul1";
assert masterServices != null : "MasterServices must not be nul1";
this.master = masterServices;
this.snapshot = snapshot;
this.snapshotTable = TableName.valueOf(snapshot.getTable());
this.conf = this.master.getConfiguration();
this.fs = this.master.getMasterFileSystem().getFileSystem();
this.rootDir = this.master.getMasterFileSystem().getRootDir();
this.snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshot, rootDir);
this.workingDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
this.monitor = new ForeignExceptionDispatcher(snapshot.getName());
this.snapshotManifest = SnapshotManifest.create(conf, fs, workingDir, snapshot, monitor);
this.tableLockManager = master.getTableLockManager();
this.tableLock =
this.tableLockManager.writeLock(snapshotTable, EventType.C_M_SNAPSHOT_TABLE.toString());
// prepare the verify
this.verifier = new MasterSnapshotVerifier(masterServices, snapshot, rootDir);
// update the running tasks
this.status =
TaskMonitor.get()
.createStatus("Taking " + snapshot.getType() + " snapshot on table: " + snapshotTable);
}
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
FServer fs = (FServer) getServletContext().getAttribute(FServer.FSERVER);
assert fs != null : "No FS in context!";
Configuration hrsconf = (Configuration) getServletContext().getAttribute(FServer.FSERVER_CONF);
assert hrsconf != null : "No FS conf in context";
response.setContentType("text/plain");
OutputStream os = response.getOutputStream();
PrintWriter out = new PrintWriter(os);
out.println("Master status for " + fs.getServerName() + " as of " + new Date());
out.println("\n\nVersion Info:");
out.println(LINE);
dumpVersionInfo(out);
out.println("\n\nTasks:");
out.println(LINE);
TaskMonitor.get().dumpAsText(out);
out.println("\n\nExecutors:");
out.println(LINE);
dumpExecutors(fs.getExecutorService(), out);
out.println("\n\nStacks:");
out.println(LINE);
ReflectionUtils.printThreadInfo(out, "");
out.println("\n\nFS Configuration:");
out.println(LINE);
Configuration conf = fs.getConfiguration();
out.flush();
conf.writeXml(os);
os.flush();
out.println("\n\nLogs");
out.println(LINE);
long tailKb = getTailKbParam(request);
LogMonitoring.dumpTailOfLogs(out, tailKb);
out.println("\n\nFS Queue:");
out.println(LINE);
if (isShowQueueDump(hrsconf)) {
dumpQueue(fs, out);
}
out.flush();
}