001 /** 002 * Copyright (c) 2010 Yahoo! Inc. All rights reserved. 003 * Licensed under the Apache License, Version 2.0 (the "License"); 004 * you may not use this file except in compliance with the License. 005 * You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software 010 * distributed under the License is distributed on an "AS IS" BASIS, 011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 * See the License for the specific language governing permissions and 013 * limitations under the License. See accompanying LICENSE file. 014 */ 015 package org.apache.oozie.command.coord; 016 017 import java.io.IOException; 018 import java.io.StringReader; 019 import java.util.Date; 020 import java.util.List; 021 022 import org.apache.hadoop.conf.Configuration; 023 import org.apache.hadoop.fs.Path; 024 import org.apache.oozie.CoordinatorActionBean; 025 import org.apache.oozie.ErrorCode; 026 import org.apache.oozie.client.CoordinatorAction; 027 import org.apache.oozie.client.OozieClient; 028 import org.apache.oozie.command.CommandException; 029 import org.apache.oozie.coord.CoordELEvaluator; 030 import org.apache.oozie.coord.CoordELFunctions; 031 import org.apache.oozie.service.HadoopAccessorException; 032 import org.apache.oozie.service.HadoopAccessorService; 033 import org.apache.oozie.service.Services; 034 import org.apache.oozie.store.CoordinatorStore; 035 import org.apache.oozie.store.StoreException; 036 import org.apache.oozie.util.DateUtils; 037 import org.apache.oozie.util.ELEvaluator; 038 import org.apache.oozie.util.Instrumentation; 039 import org.apache.oozie.util.ParamChecker; 040 import org.apache.oozie.util.XConfiguration; 041 import org.apache.oozie.util.XLog; 042 import org.apache.oozie.util.XmlUtils; 043 import org.jdom.Element; 044 045 public class CoordActionInputCheckCommand extends CoordinatorCommand<Void> { 046 047 private String actionId; 048 private final XLog log = XLog.getLog(getClass()); 049 private int COMMAND_REQUEUE_INTERVAL = 60000; // 1 minute 050 private CoordinatorActionBean coordAction = null; 051 052 public CoordActionInputCheckCommand(String actionId) { 053 super("coord_action_input", "coord_action_input", 1, XLog.STD); 054 this.actionId = actionId; 055 } 056 057 @Override 058 protected Void call(CoordinatorStore store) throws StoreException, CommandException { 059 log.debug("After store.get() for action ID " + actionId + " : " + coordAction.getStatus()); 060 // this action should only get processed if current time > 061 // materialization time 062 // otherwise, requeue this action after 30 seconds 063 Date nominalTime = coordAction.getNominalTime(); 064 Date currentTime = new Date(); 065 if (nominalTime.compareTo(currentTime) > 0) { 066 log.info("[" + actionId 067 + "]::ActionInputCheck:: nominal Time is newer than current time, so requeue and wait. Current=" 068 + currentTime + ", nominal=" + nominalTime); 069 queueCallable(new CoordActionInputCheckCommand(coordAction.getId()), Math.max( 070 (nominalTime.getTime() - currentTime.getTime()), COMMAND_REQUEUE_INTERVAL)); 071 // update lastModifiedTime 072 store.updateCoordinatorAction(coordAction); 073 return null; 074 } 075 if (coordAction.getStatus() == CoordinatorActionBean.Status.WAITING) { 076 log.info("[" + actionId + "]::ActionInputCheck:: Action is in WAITING state."); 077 StringBuilder actionXml = new StringBuilder(coordAction.getActionXml());// job.getXml(); 078 Instrumentation.Cron cron = new Instrumentation.Cron(); 079 try { 080 Configuration actionConf = new XConfiguration(new StringReader(coordAction.getRunConf())); 081 cron.start(); 082 StringBuilder existList = new StringBuilder(); 083 StringBuilder nonExistList = new StringBuilder(); 084 StringBuilder nonResolvedList = new StringBuilder(); 085 CoordCommandUtils.getResolvedList(coordAction.getMissingDependencies(), nonExistList, 086 nonResolvedList); 087 088 log.info("[" + actionId + "]::ActionInputCheck:: Missing deps:" + nonExistList.toString() + " " 089 + nonResolvedList.toString()); 090 Date actualTime = new Date(); 091 boolean status = checkInput(actionXml, existList, nonExistList, actionConf, actualTime); 092 coordAction.setLastModifiedTime(actualTime); 093 coordAction.setActionXml(actionXml.toString()); 094 if (nonResolvedList.length() > 0 && status == false) { 095 nonExistList.append(CoordCommandUtils.RESOLVED_UNRESOLVED_SEPARATOR).append( 096 nonResolvedList); 097 } 098 coordAction.setMissingDependencies(nonExistList.toString()); 099 if (status == true) { 100 coordAction.setStatus(CoordinatorAction.Status.READY); 101 // pass jobID to the ReadyCommand 102 queueCallable(new CoordActionReadyCommand(coordAction.getJobId()), 100); 103 } 104 else { 105 long waitingTime = (actualTime.getTime() - coordAction.getNominalTime().getTime()) / (60 * 1000); 106 int timeOut = coordAction.getTimeOut(); 107 if ((timeOut >= 0) && (waitingTime > timeOut)) { 108 queueCallable(new CoordActionTimeOut(coordAction), 100); 109 coordAction.setStatus(CoordinatorAction.Status.TIMEDOUT); 110 } 111 else { 112 queueCallable(new CoordActionInputCheckCommand(coordAction.getId()), COMMAND_REQUEUE_INTERVAL); 113 } 114 } 115 store.updateCoordActionMin(coordAction); 116 } 117 catch (Exception e) { 118 log.warn(actionId + ": Exception occurs: " + e + " STORE is active " + store.isActive(), e); 119 throw new CommandException(ErrorCode.E1005, e.getMessage(), e); 120 } 121 cron.stop(); 122 } 123 else { 124 log.info("[" + actionId + "]::ActionInputCheck:: Ignoring action. Should be in WAITING state, but state=" 125 + coordAction.getStatus()); 126 } 127 return null; 128 } 129 130 protected boolean checkInput(StringBuilder actionXml, StringBuilder existList, StringBuilder nonExistList, 131 Configuration conf, Date actualTime) throws Exception { 132 Element eAction = XmlUtils.parseXml(actionXml.toString()); 133 boolean allExist = checkResolvedUris(eAction, existList, nonExistList, conf); 134 if (allExist) { 135 log.debug("[" + actionId + "]::ActionInputCheck:: Checking Latest/future"); 136 allExist = checkUnresolvedInstances(eAction, conf, actualTime); 137 } 138 if (allExist == true) { 139 materializeDataProperties(eAction, conf); 140 actionXml.replace(0, actionXml.length(), XmlUtils.prettyPrint(eAction).toString()); 141 } 142 return allExist; 143 } 144 145 /** 146 * Materialize data properties defined in <action> tag. it includes dataIn(<DS>) and dataOut(<DS>) it creates a list 147 * of files that will be needed. 148 * 149 * @param eAction 150 * @param conf 151 * @throws Exception 152 * @update modify 'Action' element with appropriate list of files. 153 */ 154 private void materializeDataProperties(Element eAction, Configuration conf) throws Exception { 155 ELEvaluator eval = CoordELEvaluator.createDataEvaluator(eAction, conf, actionId); 156 Element configElem = eAction.getChild("action", eAction.getNamespace()).getChild("workflow", 157 eAction.getNamespace()).getChild("configuration", eAction.getNamespace()); 158 if (configElem != null) { 159 for (Element propElem : (List<Element>) configElem.getChildren("property", configElem.getNamespace())) { 160 resolveTagContents("value", propElem, eval); 161 } 162 } 163 } 164 165 private void resolveTagContents(String tagName, Element elem, ELEvaluator eval) throws Exception { 166 if (elem == null) { 167 return; 168 } 169 Element tagElem = elem.getChild(tagName, elem.getNamespace()); 170 if (tagElem != null) { 171 String updated = CoordELFunctions.evalAndWrap(eval, tagElem.getText()); 172 tagElem.removeContent(); 173 tagElem.addContent(updated); 174 } 175 else { 176 log.warn(" Value NOT FOUND " + tagName); 177 } 178 } 179 180 private boolean checkUnresolvedInstances(Element eAction, Configuration actionConf, Date actualTime) 181 throws Exception { 182 String strAction = XmlUtils.prettyPrint(eAction).toString(); 183 Date nominalTime = DateUtils.parseDateUTC(eAction.getAttributeValue("action-nominal-time")); 184 StringBuffer resultedXml = new StringBuffer(); 185 186 boolean ret; 187 Element inputList = eAction.getChild("input-events", eAction.getNamespace()); 188 if (inputList != null) { 189 ret = materializeUnresolvedEvent(inputList.getChildren("data-in", eAction.getNamespace()), 190 nominalTime, actualTime, actionConf); 191 if (ret == false) { 192 resultedXml.append(strAction); 193 return false; 194 } 195 } 196 197 // Using latest() or future() in output-event is not intuitive. 198 // We need to make 199 // sure, this assumption is correct. 200 Element outputList = eAction.getChild("output-events", eAction.getNamespace()); 201 if (outputList != null) { 202 for (Element dEvent : (List<Element>) outputList.getChildren("data-out", eAction.getNamespace())) { 203 if (dEvent.getChild("unresolved-instances", dEvent.getNamespace()) != null) { 204 throw new CommandException(ErrorCode.E1006, "coord:latest()/future()", 205 " not permitted in output-event "); 206 } 207 } 208 /* 209 * ret = materializeUnresolvedEvent( (List<Element>) 210 * outputList.getChildren("data-out", eAction.getNamespace()), 211 * actualTime, nominalTime, actionConf); if (ret == false) { 212 * resultedXml.append(strAction); return false; } 213 */ 214 } 215 return true; 216 } 217 218 private boolean materializeUnresolvedEvent(List<Element> eDataEvents, Date nominalTime, Date actualTime, 219 Configuration conf) throws Exception { 220 for (Element dEvent : eDataEvents) { 221 if (dEvent.getChild("unresolved-instances", dEvent.getNamespace()) == null) { 222 continue; 223 } 224 ELEvaluator eval = CoordELEvaluator.createLazyEvaluator(actualTime, nominalTime, dEvent, conf); 225 String uresolvedInstance = dEvent.getChild("unresolved-instances", dEvent.getNamespace()).getTextTrim(); 226 String unresolvedList[] = uresolvedInstance.split(CoordELFunctions.INSTANCE_SEPARATOR); 227 StringBuffer resolvedTmp = new StringBuffer(); 228 for (int i = 0; i < unresolvedList.length; i++) { 229 String ret = CoordELFunctions.evalAndWrap(eval, unresolvedList[i]); 230 Boolean isResolved = (Boolean) eval.getVariable("is_resolved"); 231 if (isResolved == false) { 232 log.info("[" + actionId + "]::Cannot resolve: " + ret); 233 return false; 234 } 235 if (resolvedTmp.length() > 0) { 236 resolvedTmp.append(CoordELFunctions.INSTANCE_SEPARATOR); 237 } 238 resolvedTmp.append((String) eval.getVariable("resolved_path")); 239 } 240 if (resolvedTmp.length() > 0) { 241 if (dEvent.getChild("uris", dEvent.getNamespace()) != null) { 242 resolvedTmp.append(CoordELFunctions.INSTANCE_SEPARATOR).append( 243 dEvent.getChild("uris", dEvent.getNamespace()).getTextTrim()); 244 dEvent.removeChild("uris", dEvent.getNamespace()); 245 } 246 Element uriInstance = new Element("uris", dEvent.getNamespace()); 247 uriInstance.addContent(resolvedTmp.toString()); 248 dEvent.getContent().add(1, uriInstance); 249 } 250 dEvent.removeChild("unresolved-instances", dEvent.getNamespace()); 251 } 252 253 return true; 254 } 255 256 private boolean checkResolvedUris(Element eAction, StringBuilder existList, StringBuilder nonExistList, 257 Configuration conf) throws IOException { 258 259 log.info("[" + actionId + "]::ActionInputCheck:: In checkResolvedUris..."); 260 Element inputList = eAction.getChild("input-events", eAction.getNamespace()); 261 if (inputList != null) { 262 // List<Element> eDataEvents = inputList.getChildren("data-in", 263 // eAction.getNamespace()); 264 // for (Element event : eDataEvents) { 265 // Element uris = event.getChild("uris", event.getNamespace()); 266 if (nonExistList.length() > 0) { 267 checkListOfPaths(existList, nonExistList, conf); 268 } 269 // } 270 return nonExistList.length() == 0; 271 } 272 return true; 273 } 274 275 private boolean checkListOfPaths(StringBuilder existList, StringBuilder nonExistList, Configuration conf) 276 throws IOException { 277 278 log.info("[" + actionId + "]::ActionInputCheck:: In checkListOfPaths for: " + nonExistList.toString()); 279 280 String[] uriList = nonExistList.toString().split(CoordELFunctions.INSTANCE_SEPARATOR); 281 nonExistList.delete(0, nonExistList.length()); 282 boolean allExists = true; 283 String existSeparator = "", nonExistSeparator = ""; 284 for (int i = 0; i < uriList.length; i++) { 285 if (allExists) { 286 allExists = pathExists(uriList[i], conf); 287 log.info("[" + actionId + "]::ActionInputCheck:: File:" + uriList[i] + ", Exists? :" + allExists); 288 } 289 if (allExists) { 290 existList.append(existSeparator).append(uriList[i]); 291 existSeparator = CoordELFunctions.INSTANCE_SEPARATOR; 292 } 293 else { 294 nonExistList.append(nonExistSeparator).append(uriList[i]); 295 nonExistSeparator = CoordELFunctions.INSTANCE_SEPARATOR; 296 } 297 } 298 return allExists; 299 } 300 301 private boolean pathExists(String sPath, Configuration actionConf) throws IOException { 302 log.debug("checking for the file " + sPath); 303 Path path = new Path(sPath); 304 String user = ParamChecker.notEmpty(actionConf.get(OozieClient.USER_NAME), OozieClient.USER_NAME); 305 String group = ParamChecker.notEmpty(actionConf.get(OozieClient.GROUP_NAME), OozieClient.GROUP_NAME); 306 try { 307 return Services.get().get(HadoopAccessorService.class).createFileSystem(user, group, path.toUri(), 308 new Configuration()).exists(path); 309 } 310 catch (HadoopAccessorException e) { 311 throw new IOException(e); 312 } 313 } 314 315 /** 316 * The function create a list of URIs separated by "," using the instances time stamp and URI-template 317 * 318 * @param event : <data-in> event 319 * @param instances : List of time stamp seprated by "," 320 * @param unresolvedInstances : list of instance with latest/future function 321 * @return : list of URIs separated by ",". 322 * @throws Exception 323 */ 324 private String createURIs(Element event, String instances, StringBuilder unresolvedInstances) throws Exception { 325 if (instances == null || instances.length() == 0) { 326 return ""; 327 } 328 String[] instanceList = instances.split(CoordELFunctions.INSTANCE_SEPARATOR); 329 StringBuilder uris = new StringBuilder(); 330 331 for (int i = 0; i < instanceList.length; i++) { 332 int funcType = CoordCommandUtils.getFuncType(instanceList[i]); 333 if (funcType == CoordCommandUtils.LATEST || funcType == CoordCommandUtils.FUTURE) { 334 if (unresolvedInstances.length() > 0) { 335 unresolvedInstances.append(CoordELFunctions.INSTANCE_SEPARATOR); 336 } 337 unresolvedInstances.append(instanceList[i]); 338 continue; 339 } 340 ELEvaluator eval = CoordELEvaluator.createURIELEvaluator(instanceList[i]); 341 // uris.append(eval.evaluate(event.getChild("dataset", 342 // event.getNamespace()).getChild("uri-template", 343 // event.getNamespace()).getTextTrim(), String.class)); 344 if (uris.length() > 0) { 345 uris.append(CoordELFunctions.INSTANCE_SEPARATOR); 346 } 347 uris.append(CoordELFunctions.evalAndWrap(eval, event.getChild("dataset", event.getNamespace()).getChild( 348 "uri-template", event.getNamespace()).getTextTrim())); 349 } 350 return uris.toString(); 351 } 352 353 @Override 354 protected Void execute(CoordinatorStore store) throws StoreException, CommandException { 355 log.info("STARTED CoordActionInputCheckCommand for actionid=" + actionId); 356 try { 357 coordAction = store.getEntityManager().find(CoordinatorActionBean.class, actionId); 358 setLogInfo(coordAction); 359 if (lock(coordAction.getJobId())) { 360 call(store); 361 } 362 else { 363 queueCallable(new CoordActionInputCheckCommand(actionId), LOCK_FAILURE_REQUEUE_INTERVAL); 364 log.warn("CoordActionInputCheckCommand lock was not acquired - failed jobId=" + coordAction.getJobId() 365 + ", actionId=" + actionId + ". Requeing the same."); 366 } 367 } 368 catch (InterruptedException e) { 369 queueCallable(new CoordActionInputCheckCommand(actionId), LOCK_FAILURE_REQUEUE_INTERVAL); 370 log.warn("CoordActionInputCheckCommand lock acquiring failed with exception " + e.getMessage() + " for jobId=" 371 + coordAction.getJobId() + ", actionId=" + actionId + " Requeing the same."); 372 } 373 finally { 374 log.info("ENDED CoordActionInputCheckCommand for actionid=" + actionId); 375 } 376 return null; 377 } 378 379 /** 380 * @param args 381 * @throws Exception 382 */ 383 public static void main(String[] args) throws Exception { 384 new Services().init(); 385 String actionId = "0000000-091221141623042-oozie-dani-C@4"; 386 try { 387 new CoordActionInputCheckCommand(actionId).call(); 388 Thread.sleep(10000); 389 } 390 finally { 391 new Services().destroy(); 392 } 393 } 394 395 }