merge -c 1437245 from trunk to branch-2 to fix YARN-231. RM Restart - Add FS-based persistent store implementation for RMStateStore. Contributed by Bikas Saha

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1437246 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Hitesh Shah 2013-01-23 00:59:57 +00:00
parent 60230692dc
commit bec2ef4cf7
9 changed files with 552 additions and 5 deletions

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@ -20,6 +20,9 @@ Release 2.0.3-alpha - Unreleased
YARN-328. Use token request messages defined in hadoop common. (suresh)
YARN-231. RM Restart - Add FS-based persistent store implementation for
RMStateStore (Bikas Saha via hitesh)
IMPROVEMENTS
YARN-223. Update process tree instead of getting new process trees.

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@ -38,6 +38,8 @@ import org.apache.hadoop.classification.InterfaceStability.Unstable;
public abstract class ApplicationAttemptId implements
Comparable<ApplicationAttemptId> {
public static final String appAttemptIdStrPrefix = "appattempt_";
/**
* Get the <code>ApplicationId</code> of the <code>ApplicationAttempId</code>.
* @return <code>ApplicationId</code> of the <code>ApplicationAttempId</code>
@ -111,7 +113,7 @@ public abstract class ApplicationAttemptId implements
@Override
public String toString() {
StringBuilder sb = new StringBuilder("appattempt_");
StringBuilder sb = new StringBuilder(appAttemptIdStrPrefix);
sb.append(this.getApplicationId().getClusterTimestamp()).append("_");
sb.append(ApplicationId.appIdFormat.get().format(
this.getApplicationId().getId()));

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@ -38,6 +38,8 @@ import org.apache.hadoop.classification.InterfaceStability.Unstable;
@Stable
public abstract class ApplicationId implements Comparable<ApplicationId> {
public static final String appIdStrPrefix = "application_";
/**
* Get the short integer identifier of the <code>ApplicationId</code>
* which is unique for all applications started by a particular instance
@ -88,7 +90,7 @@ public abstract class ApplicationId implements Comparable<ApplicationId> {
@Override
public String toString() {
return "application_" + this.getClusterTimestamp() + "_"
return appIdStrPrefix + this.getClusterTimestamp() + "_"
+ appIdFormat.get().format(getId());
}

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@ -236,6 +236,10 @@ public class YarnConfiguration extends Configuration {
/** The class to use as the persistent store.*/
public static final String RM_STORE = RM_PREFIX + "store.class";
/** URI for FileSystemRMStateStore */
public static final String FS_RM_STATE_STORE_URI =
RM_PREFIX + "fs.rm-state-store.uri";
/** The maximum number of completed applications RM keeps. */
public static final String RM_MAX_COMPLETED_APPLICATIONS =
RM_PREFIX + "max-completed-applications";

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@ -230,6 +230,17 @@
<property>
<description>The class to use as the persistent store.</description>
<name>yarn.resourcemanager.store.class</name>
<value>org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore</value>
</property>
<property>
<description>URI pointing to the location of the FileSystem path where
RM state will be stored. This must be supplied when using
org.apache.hadoop.yarn.server.resourcemanager.recovery.FileSystemRMStateStore
as the value for yarn.resourcemanager.store.class</description>
<name>yarn.resourcemanager.fs.rm-state-store.uri</name>
<value>${hadoop.tmp.dir}/yarn/system/rmstore</value>
<!--value>hdfs://localhost:9000/rmstore</value-->
</property>
<property>

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@ -41,6 +41,12 @@
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-yarn-server-web-proxy</artifactId>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-hdfs</artifactId>
<type>test-jar</type>
<scope>test</scope>
</dependency>
</dependencies>
<build>

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@ -0,0 +1,233 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.server.resourcemanager.recovery;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationAttemptStateDataPBImpl;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationStateDataPBImpl;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationAttemptStateDataProto;
import org.apache.hadoop.yarn.proto.YarnProtos.ApplicationStateDataProto;
import org.apache.hadoop.yarn.util.ConverterUtils;
import com.google.common.annotations.VisibleForTesting;
@Private
@Unstable
/**
* A simple class for storing RM state in any storage that implements a basic
* FileSystem interface. Does not use directories so that simple key-value
* stores can be used. The retry policy for the real filesystem client must be
* configured separately to enable retry of filesystem operations when needed.
*/
public class FileSystemRMStateStore extends RMStateStore {
public static final Log LOG = LogFactory.getLog(FileSystemRMStateStore.class);
private static final String ROOT_DIR_NAME = "FSRMStateRoot";
private FileSystem fs;
private Path fsRootDirPath;
@VisibleForTesting
Path fsWorkingPath;
public synchronized void initInternal(Configuration conf)
throws Exception{
fsWorkingPath = new Path(conf.get(YarnConfiguration.FS_RM_STATE_STORE_URI));
fsRootDirPath = new Path(fsWorkingPath, ROOT_DIR_NAME);
// create filesystem
fs = fsWorkingPath.getFileSystem(conf);
fs.mkdirs(fsRootDirPath);
}
@Override
protected synchronized void closeInternal() throws Exception {
fs.close();
}
@Override
public synchronized RMState loadState() throws Exception {
try {
RMState state = new RMState();
FileStatus[] childNodes = fs.listStatus(fsRootDirPath);
List<ApplicationAttemptState> attempts =
new ArrayList<ApplicationAttemptState>();
for(FileStatus childNodeStatus : childNodes) {
assert childNodeStatus.isFile();
String childNodeName = childNodeStatus.getPath().getName();
Path childNodePath = getNodePath(childNodeName);
byte[] childData = readFile(childNodePath, childNodeStatus.getLen());
if(childNodeName.startsWith(ApplicationId.appIdStrPrefix)){
// application
LOG.info("Loading application from node: " + childNodeName);
ApplicationId appId = ConverterUtils.toApplicationId(childNodeName);
ApplicationStateDataPBImpl appStateData =
new ApplicationStateDataPBImpl(
ApplicationStateDataProto.parseFrom(childData));
ApplicationState appState = new ApplicationState(
appStateData.getSubmitTime(),
appStateData.getApplicationSubmissionContext());
// assert child node name is same as actual applicationId
assert appId.equals(appState.context.getApplicationId());
state.appState.put(appId, appState);
} else if(childNodeName.startsWith(
ApplicationAttemptId.appAttemptIdStrPrefix)) {
// attempt
LOG.info("Loading application attempt from node: " + childNodeName);
ApplicationAttemptId attemptId =
ConverterUtils.toApplicationAttemptId(childNodeName);
ApplicationAttemptStateDataPBImpl attemptStateData =
new ApplicationAttemptStateDataPBImpl(
ApplicationAttemptStateDataProto.parseFrom(childData));
ApplicationAttemptState attemptState = new ApplicationAttemptState(
attemptId, attemptStateData.getMasterContainer());
// assert child node name is same as application attempt id
assert attemptId.equals(attemptState.getAttemptId());
attempts.add(attemptState);
} else {
LOG.info("Unknown child node with name: " + childNodeName);
}
}
// go through all attempts and add them to their apps
for(ApplicationAttemptState attemptState : attempts) {
ApplicationId appId = attemptState.getAttemptId().getApplicationId();
ApplicationState appState = state.appState.get(appId);
if(appState != null) {
appState.attempts.put(attemptState.getAttemptId(), attemptState);
} else {
// the application node may have been removed when the application
// completed but the RM might have stopped before it could remove the
// application attempt nodes
LOG.info("Application node not found for attempt: "
+ attemptState.getAttemptId());
deleteFile(getNodePath(attemptState.getAttemptId().toString()));
}
}
return state;
} catch (Exception e) {
LOG.error("Failed to load state.", e);
throw e;
}
}
@Override
public synchronized void storeApplicationState(String appId,
ApplicationStateDataPBImpl appStateDataPB)
throws Exception {
Path nodeCreatePath = getNodePath(appId);
LOG.info("Storing info for app: " + appId + " at: " + nodeCreatePath);
byte[] appStateData = appStateDataPB.getProto().toByteArray();
try {
// currently throw all exceptions. May need to respond differently for HA
// based on whether we have lost the right to write to FS
writeFile(nodeCreatePath, appStateData);
} catch (Exception e) {
LOG.info("Error storing info for app: " + appId, e);
throw e;
}
}
@Override
public synchronized void storeApplicationAttemptState(String attemptId,
ApplicationAttemptStateDataPBImpl attemptStateDataPB)
throws Exception {
Path nodeCreatePath = getNodePath(attemptId);
LOG.info("Storing info for attempt: " + attemptId
+ " at: " + nodeCreatePath);
byte[] attemptStateData = attemptStateDataPB.getProto().toByteArray();
try {
// currently throw all exceptions. May need to respond differently for HA
// based on whether we have lost the right to write to FS
writeFile(nodeCreatePath, attemptStateData);
} catch (Exception e) {
LOG.info("Error storing info for attempt: " + attemptId, e);
throw e;
}
}
@Override
public synchronized void removeApplicationState(ApplicationState appState)
throws Exception {
String appId = appState.getAppId().toString();
Path nodeRemovePath = getNodePath(appId);
LOG.info("Removing info for app: " + appId + " at: " + nodeRemovePath);
deleteFile(nodeRemovePath);
for(ApplicationAttemptId attemptId : appState.attempts.keySet()) {
removeApplicationAttemptState(attemptId.toString());
}
}
public synchronized void removeApplicationAttemptState(String attemptId)
throws Exception {
Path nodeRemovePath = getNodePath(attemptId);
LOG.info("Removing info for attempt: " + attemptId
+ " at: " + nodeRemovePath);
deleteFile(nodeRemovePath);
}
// FileSystem related code
private void deleteFile(Path deletePath) throws Exception {
if(!fs.delete(deletePath, true)) {
throw new Exception("Failed to delete " + deletePath);
}
}
private byte[] readFile(Path inputPath, long len) throws Exception {
FSDataInputStream fsIn = fs.open(inputPath);
// state data will not be that "long"
byte[] data = new byte[(int)len];
fsIn.readFully(data);
return data;
}
private void writeFile(Path outputPath, byte[] data) throws Exception {
FSDataOutputStream fsOut = fs.create(outputPath, false);
fsOut.write(data);
fsOut.flush();
fsOut.close();
}
@VisibleForTesting
Path getNodePath(String nodeName) {
return new Path(fsRootDirPath, nodeName);
}
}

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@ -18,10 +18,12 @@
package org.apache.hadoop.yarn.server.resourcemanager.recovery;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationAttemptStateDataPBImpl;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationStateDataPBImpl;
@Unstable
public class NullRMStateStore extends RMStateStore {
@Override
@ -36,7 +38,7 @@ public class NullRMStateStore extends RMStateStore {
@Override
public RMState loadState() throws Exception {
return null;
throw new UnsupportedOperationException("Cannot load state from null store");
}
@Override

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@ -0,0 +1,284 @@
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.server.resourcemanager.recovery;
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.util.HashMap;
import java.util.Map;
import org.junit.Test;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
import org.apache.hadoop.yarn.api.records.Container;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.impl.pb.ApplicationSubmissionContextPBImpl;
import org.apache.hadoop.yarn.api.records.impl.pb.ContainerPBImpl;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.event.Dispatcher;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.ApplicationAttemptState;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.ApplicationState;
import org.apache.hadoop.yarn.server.resourcemanager.recovery.RMStateStore.RMState;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.RMApp;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.RMAppAttempt;
import org.apache.hadoop.yarn.server.resourcemanager.rmapp.attempt.event.RMAppAttemptStoredEvent;
import org.apache.hadoop.yarn.util.ConverterUtils;
public class TestRMStateStore {
public static final Log LOG = LogFactory.getLog(TestRMStateStore.class);
class TestDispatcher implements Dispatcher, EventHandler<RMAppAttemptStoredEvent> {
ApplicationAttemptId attemptId;
Exception storedException;
boolean notified = false;
@SuppressWarnings("rawtypes")
@Override
public void register(Class<? extends Enum> eventType, EventHandler handler) {
}
@Override
public void handle(RMAppAttemptStoredEvent event) {
assertEquals(attemptId, event.getApplicationAttemptId());
assertEquals(storedException, event.getStoredException());
notified = true;
synchronized (this) {
notifyAll();
}
}
@SuppressWarnings("rawtypes")
@Override
public EventHandler getEventHandler() {
return this;
}
}
interface RMStateStoreHelper {
RMStateStore getRMStateStore() throws Exception;
void addOrphanAttemptIfNeeded(RMStateStore testStore,
TestDispatcher dispatcher) throws Exception;
boolean isFinalStateValid() throws Exception;
}
@Test
public void testFSRMStateStore() throws Exception {
HdfsConfiguration conf = new HdfsConfiguration();
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
try {
TestFSRMStateStoreTester fsTester = new TestFSRMStateStoreTester(cluster);
testRMStateStore(fsTester);
} finally {
cluster.shutdown();
}
}
class TestFSRMStateStoreTester implements RMStateStoreHelper {
Path workingDirPathURI;
FileSystemRMStateStore store;
MiniDFSCluster cluster;
class TestFileSystemRMStore extends FileSystemRMStateStore {
TestFileSystemRMStore(Configuration conf) throws Exception {
init(conf);
assertTrue(workingDirPathURI.equals(fsWorkingPath));
}
}
public TestFSRMStateStoreTester(MiniDFSCluster cluster) throws Exception {
Path workingDirPath = new Path("/Test");
this.cluster = cluster;
FileSystem fs = cluster.getFileSystem();
fs.mkdirs(workingDirPath);
Path clusterURI = new Path(cluster.getURI());
workingDirPathURI = new Path(clusterURI, workingDirPath);
fs.close();
}
@Override
public RMStateStore getRMStateStore() throws Exception {
YarnConfiguration conf = new YarnConfiguration();
conf.set(YarnConfiguration.FS_RM_STATE_STORE_URI, workingDirPathURI.toString());
this.store = new TestFileSystemRMStore(conf);
return store;
}
@Override
public void addOrphanAttemptIfNeeded(RMStateStore testStore,
TestDispatcher dispatcher) throws Exception {
ApplicationAttemptId attemptId = ConverterUtils.toApplicationAttemptId(
"appattempt_1352994193343_0003_000001");
storeAttempt(testStore, attemptId,
"container_1352994193343_0003_01_000001", dispatcher);
}
@Override
public boolean isFinalStateValid() throws Exception {
FileSystem fs = cluster.getFileSystem();
FileStatus[] files = fs.listStatus(workingDirPathURI);
if(files.length == 1) {
// only store root directory should exist
return true;
}
return false;
}
}
void waitNotify(TestDispatcher dispatcher) {
long startTime = System.currentTimeMillis();
while(!dispatcher.notified) {
synchronized (dispatcher) {
try {
dispatcher.wait(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
if(System.currentTimeMillis() - startTime > 1000*60) {
fail("Timed out attempt store notification");
}
}
dispatcher.notified = false;
}
void storeApp(RMStateStore store, ApplicationId appId, long time)
throws Exception {
ApplicationSubmissionContext context = new ApplicationSubmissionContextPBImpl();
context.setApplicationId(appId);
RMApp mockApp = mock(RMApp.class);
when(mockApp.getApplicationId()).thenReturn(appId);
when(mockApp.getSubmitTime()).thenReturn(time);
when(mockApp.getApplicationSubmissionContext()).thenReturn(context);
store.storeApplication(mockApp);
}
ContainerId storeAttempt(RMStateStore store, ApplicationAttemptId attemptId,
String containerIdStr, TestDispatcher dispatcher)
throws Exception {
Container container = new ContainerPBImpl();
container.setId(ConverterUtils.toContainerId(containerIdStr));
RMAppAttempt mockAttempt = mock(RMAppAttempt.class);
when(mockAttempt.getAppAttemptId()).thenReturn(attemptId);
when(mockAttempt.getMasterContainer()).thenReturn(container);
dispatcher.attemptId = attemptId;
dispatcher.storedException = null;
store.storeApplicationAttempt(mockAttempt);
waitNotify(dispatcher);
return container.getId();
}
void testRMStateStore(RMStateStoreHelper stateStoreHelper) throws Exception {
long submitTime = System.currentTimeMillis();
RMStateStore store = stateStoreHelper.getRMStateStore();
TestDispatcher dispatcher = new TestDispatcher();
store.setDispatcher(dispatcher);
ApplicationAttemptId attemptId1 = ConverterUtils
.toApplicationAttemptId("appattempt_1352994193343_0001_000001");
ApplicationId appId1 = attemptId1.getApplicationId();
storeApp(store, appId1, submitTime);
ContainerId containerId1 = storeAttempt(store, attemptId1,
"container_1352994193343_0001_01_000001", dispatcher);
String appAttemptIdStr2 = "appattempt_1352994193343_0001_000002";
ApplicationAttemptId attemptId2 =
ConverterUtils.toApplicationAttemptId(appAttemptIdStr2);
ContainerId containerId2 = storeAttempt(store, attemptId2,
"container_1352994193343_0001_02_000001", dispatcher);
ApplicationAttemptId attemptIdRemoved = ConverterUtils
.toApplicationAttemptId("appattempt_1352994193343_0002_000001");
ApplicationId appIdRemoved = attemptIdRemoved.getApplicationId();
storeApp(store, appIdRemoved, submitTime);
storeAttempt(store, attemptIdRemoved,
"container_1352994193343_0002_01_000001", dispatcher);
RMApp mockRemovedApp = mock(RMApp.class);
HashMap<ApplicationAttemptId, RMAppAttempt> attempts =
new HashMap<ApplicationAttemptId, RMAppAttempt>();
ApplicationSubmissionContext context = new ApplicationSubmissionContextPBImpl();
context.setApplicationId(appIdRemoved);
when(mockRemovedApp.getSubmitTime()).thenReturn(submitTime);
when(mockRemovedApp.getApplicationSubmissionContext()).thenReturn(context);
when(mockRemovedApp.getAppAttempts()).thenReturn(attempts);
RMAppAttempt mockRemovedAttempt = mock(RMAppAttempt.class);
when(mockRemovedAttempt.getAppAttemptId()).thenReturn(attemptIdRemoved);
attempts.put(attemptIdRemoved, mockRemovedAttempt);
store.removeApplication(mockRemovedApp);
// add orphan attempt file to simulate incomplete removal of app state
stateStoreHelper.addOrphanAttemptIfNeeded(store, dispatcher);
// let things settle down
Thread.sleep(1000);
store.close();
// load state
store = stateStoreHelper.getRMStateStore();
RMState state = store.loadState();
Map<ApplicationId, ApplicationState> rmAppState = state.getApplicationState();
// removed app or orphan attempt is not loaded
assertEquals(1, rmAppState.size());
ApplicationState appState = rmAppState.get(appId1);
// app is loaded
assertNotNull(appState);
// app is loaded correctly
assertEquals(submitTime, appState.getSubmitTime());
// submission context is loaded correctly
assertEquals(appId1,
appState.getApplicationSubmissionContext().getApplicationId());
ApplicationAttemptState attemptState = appState.getAttempt(attemptId1);
// attempt1 is loaded correctly
assertNotNull(attemptState);
assertEquals(attemptId1, attemptState.getAttemptId());
// attempt1 container is loaded correctly
assertEquals(containerId1, attemptState.getMasterContainer().getId());
attemptState = appState.getAttempt(attemptId2);
// attempt2 is loaded correctly
assertNotNull(attemptState);
assertEquals(attemptId2, attemptState.getAttemptId());
// attempt2 container is loaded correctly
assertEquals(containerId2, attemptState.getMasterContainer().getId());
// assert store is in expected state after everything is cleaned
assertTrue(stateStoreHelper.isFinalStateValid());
store.close();
}
}