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19 package org.apache.hadoop.hbase.master.procedure;
20
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.io.OutputStream;
24 import java.security.PrivilegedExceptionAction;
25 import java.util.ArrayList;
26 import java.util.List;
27 import java.util.concurrent.atomic.AtomicBoolean;
28
29 import org.apache.commons.logging.Log;
30 import org.apache.commons.logging.LogFactory;
31 import org.apache.hadoop.fs.FileSystem;
32 import org.apache.hadoop.fs.Path;
33 import org.apache.hadoop.hbase.HRegionInfo;
34 import org.apache.hadoop.hbase.HTableDescriptor;
35 import org.apache.hadoop.hbase.MetaTableAccessor;
36 import org.apache.hadoop.hbase.TableExistsException;
37 import org.apache.hadoop.hbase.TableName;
38 import org.apache.hadoop.hbase.TableStateManager;
39 import org.apache.hadoop.hbase.classification.InterfaceAudience;
40 import org.apache.hadoop.hbase.client.RegionReplicaUtil;
41 import org.apache.hadoop.hbase.exceptions.HBaseException;
42 import org.apache.hadoop.hbase.master.AssignmentManager;
43 import org.apache.hadoop.hbase.master.MasterCoprocessorHost;
44 import org.apache.hadoop.hbase.master.MasterFileSystem;
45 import org.apache.hadoop.hbase.procedure2.StateMachineProcedure;
46 import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos;
47 import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos;
48 import org.apache.hadoop.hbase.protobuf.generated.MasterProcedureProtos.CreateTableState;
49 import org.apache.hadoop.hbase.protobuf.generated.ZooKeeperProtos;
50 import org.apache.hadoop.hbase.util.FSTableDescriptors;
51 import org.apache.hadoop.hbase.util.FSUtils;
52 import org.apache.hadoop.hbase.util.ModifyRegionUtils;
53 import org.apache.hadoop.hbase.util.ServerRegionReplicaUtil;
54 import org.apache.hadoop.security.UserGroupInformation;
55
56 import com.google.common.collect.Lists;
57
58 @InterfaceAudience.Private
59 public class CreateTableProcedure
60 extends StateMachineProcedure<MasterProcedureEnv, CreateTableState>
61 implements TableProcedureInterface {
62 private static final Log LOG = LogFactory.getLog(CreateTableProcedure.class);
63
64 private final AtomicBoolean aborted = new AtomicBoolean(false);
65
66
67 private final ProcedurePrepareLatch syncLatch;
68
69 private HTableDescriptor hTableDescriptor;
70 private List<HRegionInfo> newRegions;
71 private UserGroupInformation user;
72
73 public CreateTableProcedure() {
74
75 syncLatch = null;
76 }
77
78 public CreateTableProcedure(final MasterProcedureEnv env,
79 final HTableDescriptor hTableDescriptor, final HRegionInfo[] newRegions)
80 throws IOException {
81 this(env, hTableDescriptor, newRegions, null);
82 }
83
84 public CreateTableProcedure(final MasterProcedureEnv env,
85 final HTableDescriptor hTableDescriptor, final HRegionInfo[] newRegions,
86 final ProcedurePrepareLatch syncLatch)
87 throws IOException {
88 this.hTableDescriptor = hTableDescriptor;
89 this.newRegions = newRegions != null ? Lists.newArrayList(newRegions) : null;
90 this.user = env.getRequestUser().getUGI();
91 this.setOwner(this.user.getShortUserName());
92
93
94
95 this.syncLatch = syncLatch;
96 }
97
98 @Override
99 protected Flow executeFromState(final MasterProcedureEnv env, final CreateTableState state)
100 throws InterruptedException {
101 if (LOG.isTraceEnabled()) {
102 LOG.trace(this + " execute state=" + state);
103 }
104 try {
105 switch (state) {
106 case CREATE_TABLE_PRE_OPERATION:
107
108 boolean exists = !prepareCreate(env);
109 ProcedurePrepareLatch.releaseLatch(syncLatch, this);
110
111 if (exists) {
112 assert isFailed() : "the delete should have an exception here";
113 return Flow.NO_MORE_STATE;
114 }
115
116 preCreate(env);
117 setNextState(CreateTableState.CREATE_TABLE_WRITE_FS_LAYOUT);
118 break;
119 case CREATE_TABLE_WRITE_FS_LAYOUT:
120 newRegions = createFsLayout(env, hTableDescriptor, newRegions);
121 setNextState(CreateTableState.CREATE_TABLE_ADD_TO_META);
122 break;
123 case CREATE_TABLE_ADD_TO_META:
124 newRegions = addTableToMeta(env, hTableDescriptor, newRegions);
125 setNextState(CreateTableState.CREATE_TABLE_ASSIGN_REGIONS);
126 break;
127 case CREATE_TABLE_ASSIGN_REGIONS:
128 assignRegions(env, getTableName(), newRegions);
129 setNextState(CreateTableState.CREATE_TABLE_UPDATE_DESC_CACHE);
130 break;
131 case CREATE_TABLE_UPDATE_DESC_CACHE:
132 updateTableDescCache(env, getTableName());
133 setNextState(CreateTableState.CREATE_TABLE_POST_OPERATION);
134 break;
135 case CREATE_TABLE_POST_OPERATION:
136 postCreate(env);
137 return Flow.NO_MORE_STATE;
138 default:
139 throw new UnsupportedOperationException("unhandled state=" + state);
140 }
141 } catch (HBaseException|IOException e) {
142 LOG.error("Error trying to create table=" + getTableName() + " state=" + state, e);
143 setFailure("master-create-table", e);
144 }
145 return Flow.HAS_MORE_STATE;
146 }
147
148 @Override
149 protected void rollbackState(final MasterProcedureEnv env, final CreateTableState state)
150 throws IOException {
151 if (LOG.isTraceEnabled()) {
152 LOG.trace(this + " rollback state=" + state);
153 }
154 try {
155 switch (state) {
156 case CREATE_TABLE_POST_OPERATION:
157 break;
158 case CREATE_TABLE_UPDATE_DESC_CACHE:
159 DeleteTableProcedure.deleteTableDescriptorCache(env, getTableName());
160 break;
161 case CREATE_TABLE_ASSIGN_REGIONS:
162 DeleteTableProcedure.deleteAssignmentState(env, getTableName());
163 break;
164 case CREATE_TABLE_ADD_TO_META:
165 DeleteTableProcedure.deleteFromMeta(env, getTableName(), newRegions);
166 break;
167 case CREATE_TABLE_WRITE_FS_LAYOUT:
168 DeleteTableProcedure.deleteFromFs(env, getTableName(), newRegions, false);
169 break;
170 case CREATE_TABLE_PRE_OPERATION:
171 DeleteTableProcedure.deleteTableStates(env, getTableName());
172
173 ProcedurePrepareLatch.releaseLatch(syncLatch, this);
174 break;
175 default:
176 throw new UnsupportedOperationException("unhandled state=" + state);
177 }
178 } catch (HBaseException e) {
179 LOG.warn("Failed rollback attempt step=" + state + " table=" + getTableName(), e);
180 throw new IOException(e);
181 } catch (IOException e) {
182
183
184 LOG.warn("Failed rollback attempt step=" + state + " table=" + getTableName(), e);
185 throw e;
186 }
187 }
188
189 @Override
190 protected CreateTableState getState(final int stateId) {
191 return CreateTableState.valueOf(stateId);
192 }
193
194 @Override
195 protected int getStateId(final CreateTableState state) {
196 return state.getNumber();
197 }
198
199 @Override
200 protected CreateTableState getInitialState() {
201 return CreateTableState.CREATE_TABLE_PRE_OPERATION;
202 }
203
204 @Override
205 protected void setNextState(final CreateTableState state) {
206 if (aborted.get()) {
207 setAbortFailure("create-table", "abort requested");
208 } else {
209 super.setNextState(state);
210 }
211 }
212
213 @Override
214 public TableName getTableName() {
215 return hTableDescriptor.getTableName();
216 }
217
218 @Override
219 public TableOperationType getTableOperationType() {
220 return TableOperationType.CREATE;
221 }
222
223 @Override
224 public boolean abort(final MasterProcedureEnv env) {
225 aborted.set(true);
226 return true;
227 }
228
229 @Override
230 public void toStringClassDetails(StringBuilder sb) {
231 sb.append(getClass().getSimpleName());
232 sb.append(" (table=");
233 sb.append(getTableName());
234 sb.append(")");
235 }
236
237 @Override
238 public void serializeStateData(final OutputStream stream) throws IOException {
239 super.serializeStateData(stream);
240
241 MasterProcedureProtos.CreateTableStateData.Builder state =
242 MasterProcedureProtos.CreateTableStateData.newBuilder()
243 .setUserInfo(MasterProcedureUtil.toProtoUserInfo(this.user))
244 .setTableSchema(hTableDescriptor.convert());
245 if (newRegions != null) {
246 for (HRegionInfo hri: newRegions) {
247 state.addRegionInfo(HRegionInfo.convert(hri));
248 }
249 }
250 state.build().writeDelimitedTo(stream);
251 }
252
253 @Override
254 public void deserializeStateData(final InputStream stream) throws IOException {
255 super.deserializeStateData(stream);
256
257 MasterProcedureProtos.CreateTableStateData state =
258 MasterProcedureProtos.CreateTableStateData.parseDelimitedFrom(stream);
259 user = MasterProcedureUtil.toUserInfo(state.getUserInfo());
260 hTableDescriptor = HTableDescriptor.convert(state.getTableSchema());
261 if (state.getRegionInfoCount() == 0) {
262 newRegions = null;
263 } else {
264 newRegions = new ArrayList<HRegionInfo>(state.getRegionInfoCount());
265 for (HBaseProtos.RegionInfo hri: state.getRegionInfoList()) {
266 newRegions.add(HRegionInfo.convert(hri));
267 }
268 }
269 }
270
271 @Override
272 protected boolean acquireLock(final MasterProcedureEnv env) {
273 if (!getTableName().isSystemTable() && env.waitInitialized(this)) {
274 return false;
275 }
276 return env.getProcedureQueue().tryAcquireTableExclusiveLock(this, getTableName());
277 }
278
279 @Override
280 protected void releaseLock(final MasterProcedureEnv env) {
281 env.getProcedureQueue().releaseTableExclusiveLock(this, getTableName());
282 }
283
284 private boolean prepareCreate(final MasterProcedureEnv env) throws IOException {
285 final TableName tableName = getTableName();
286 if (MetaTableAccessor.tableExists(env.getMasterServices().getConnection(), tableName)) {
287 setFailure("master-create-table", new TableExistsException(getTableName()));
288 return false;
289 }
290
291
292
293 boolean skipTableStateCheck =
294 !(env.getMasterServices().isInitialized()) && tableName.isSystemTable();
295 if (!skipTableStateCheck) {
296 TableStateManager tsm = env.getMasterServices().getAssignmentManager().getTableStateManager();
297 if (tsm.isTableState(tableName, true, ZooKeeperProtos.Table.State.ENABLING,
298 ZooKeeperProtos.Table.State.ENABLED)) {
299 LOG.warn("The table " + tableName + " does not exist in meta but has a znode. " +
300 "run hbck to fix inconsistencies.");
301 setFailure("master-create-table", new TableExistsException(getTableName()));
302 return false;
303 }
304 }
305 return true;
306 }
307
308 private void preCreate(final MasterProcedureEnv env)
309 throws IOException, InterruptedException {
310 if (!getTableName().isSystemTable()) {
311 ProcedureSyncWait.getMasterQuotaManager(env)
312 .checkNamespaceTableAndRegionQuota(getTableName(), newRegions.size());
313 }
314
315 final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();
316 if (cpHost != null) {
317 final HRegionInfo[] regions = newRegions == null ? null :
318 newRegions.toArray(new HRegionInfo[newRegions.size()]);
319 user.doAs(new PrivilegedExceptionAction<Void>() {
320 @Override
321 public Void run() throws Exception {
322 cpHost.preCreateTableHandler(hTableDescriptor, regions);
323 return null;
324 }
325 });
326 }
327 }
328
329 private void postCreate(final MasterProcedureEnv env)
330 throws IOException, InterruptedException {
331 final MasterCoprocessorHost cpHost = env.getMasterCoprocessorHost();
332 if (cpHost != null) {
333 final HRegionInfo[] regions = (newRegions == null) ? null :
334 newRegions.toArray(new HRegionInfo[newRegions.size()]);
335 user.doAs(new PrivilegedExceptionAction<Void>() {
336 @Override
337 public Void run() throws Exception {
338 cpHost.postCreateTableHandler(hTableDescriptor, regions);
339 return null;
340 }
341 });
342 }
343 }
344
345 protected interface CreateHdfsRegions {
346 List<HRegionInfo> createHdfsRegions(final MasterProcedureEnv env,
347 final Path tableRootDir, final TableName tableName,
348 final List<HRegionInfo> newRegions) throws IOException;
349 }
350
351 protected static List<HRegionInfo> createFsLayout(final MasterProcedureEnv env,
352 final HTableDescriptor hTableDescriptor, final List<HRegionInfo> newRegions)
353 throws IOException {
354 return createFsLayout(env, hTableDescriptor, newRegions, new CreateHdfsRegions() {
355 @Override
356 public List<HRegionInfo> createHdfsRegions(final MasterProcedureEnv env,
357 final Path tableRootDir, final TableName tableName,
358 final List<HRegionInfo> newRegions) throws IOException {
359 HRegionInfo[] regions = newRegions != null ?
360 newRegions.toArray(new HRegionInfo[newRegions.size()]) : null;
361 return ModifyRegionUtils.createRegions(env.getMasterConfiguration(),
362 tableRootDir, hTableDescriptor, regions, null);
363 }
364 });
365 }
366
367 protected static List<HRegionInfo> createFsLayout(final MasterProcedureEnv env,
368 final HTableDescriptor hTableDescriptor, List<HRegionInfo> newRegions,
369 final CreateHdfsRegions hdfsRegionHandler) throws IOException {
370 final MasterFileSystem mfs = env.getMasterServices().getMasterFileSystem();
371 final Path tempdir = mfs.getTempDir();
372
373
374
375 final Path tempTableDir = FSUtils.getTableDir(tempdir, hTableDescriptor.getTableName());
376 new FSTableDescriptors(env.getMasterConfiguration()).createTableDescriptorForTableDirectory(
377 tempTableDir, hTableDescriptor, false);
378
379
380 newRegions = hdfsRegionHandler.createHdfsRegions(env, tempdir,
381 hTableDescriptor.getTableName(), newRegions);
382
383
384 final Path tableDir = FSUtils.getTableDir(mfs.getRootDir(), hTableDescriptor.getTableName());
385 FileSystem fs = mfs.getFileSystem();
386 if (!fs.delete(tableDir, true) && fs.exists(tableDir)) {
387 throw new IOException("Couldn't delete " + tableDir);
388 }
389 if (!fs.rename(tempTableDir, tableDir)) {
390 throw new IOException("Unable to move table from temp=" + tempTableDir +
391 " to hbase root=" + tableDir);
392 }
393 return newRegions;
394 }
395
396 protected static List<HRegionInfo> addTableToMeta(final MasterProcedureEnv env,
397 final HTableDescriptor hTableDescriptor,
398 final List<HRegionInfo> regions) throws IOException {
399 if (regions != null && regions.size() > 0) {
400 ProcedureSyncWait.waitMetaRegions(env);
401
402
403 addRegionsToMeta(env, hTableDescriptor, regions);
404
405 List<HRegionInfo> newRegions = addReplicas(env, hTableDescriptor, regions);
406
407
408 if (hTableDescriptor.getRegionReplication() > 1) {
409 ServerRegionReplicaUtil.setupRegionReplicaReplication(env.getMasterConfiguration());
410 }
411 return newRegions;
412 }
413 return regions;
414 }
415
416
417
418
419
420
421
422
423 private static List<HRegionInfo> addReplicas(final MasterProcedureEnv env,
424 final HTableDescriptor hTableDescriptor,
425 final List<HRegionInfo> regions) {
426 int numRegionReplicas = hTableDescriptor.getRegionReplication() - 1;
427 if (numRegionReplicas <= 0) {
428 return regions;
429 }
430 List<HRegionInfo> hRegionInfos =
431 new ArrayList<HRegionInfo>((numRegionReplicas+1)*regions.size());
432 for (int i = 0; i < regions.size(); i++) {
433 for (int j = 1; j <= numRegionReplicas; j++) {
434 hRegionInfos.add(RegionReplicaUtil.getRegionInfoForReplica(regions.get(i), j));
435 }
436 }
437 hRegionInfos.addAll(regions);
438 return hRegionInfos;
439 }
440
441 protected static void assignRegions(final MasterProcedureEnv env,
442 final TableName tableName, final List<HRegionInfo> regions)
443 throws HBaseException, IOException {
444 ProcedureSyncWait.waitRegionServers(env);
445
446 final AssignmentManager assignmentManager = env.getMasterServices().getAssignmentManager();
447
448
449 assignmentManager.getTableStateManager().setTableState(tableName,
450 ZooKeeperProtos.Table.State.ENABLING);
451
452
453 ModifyRegionUtils.assignRegions(assignmentManager, regions);
454
455
456 assignmentManager.getTableStateManager()
457 .setTableState(tableName, ZooKeeperProtos.Table.State.ENABLED);
458 }
459
460
461
462
463 protected static void addRegionsToMeta(final MasterProcedureEnv env,
464 final HTableDescriptor hTableDescriptor,
465 final List<HRegionInfo> regionInfos) throws IOException {
466 MetaTableAccessor.addRegionsToMeta(env.getMasterServices().getConnection(),
467 regionInfos, hTableDescriptor.getRegionReplication());
468 }
469
470 protected static void updateTableDescCache(final MasterProcedureEnv env,
471 final TableName tableName) throws IOException {
472 env.getMasterServices().getTableDescriptors().get(tableName);
473 }
474
475 @Override
476 protected boolean shouldWaitClientAck(MasterProcedureEnv env) {
477
478
479 return !getTableName().isSystemTable();
480 }
481 }