bookkeeper-server/src/test/java/org/apache/bookkeeper/client/TestLedgerFragmentReplication.java - bookkeeper - Git at Google

 /**
  * 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.bookkeeper.client;

 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.util.ArrayList;
 import java.util.Enumeration;
 import java.util.Set;
 import java.util.SortedMap;
 import java.util.Map.Entry;
 import java.util.concurrent.CountDownLatch;

 import org.apache.bookkeeper.client.BookKeeper.DigestType;
 import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback;
 import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
 import org.junit.Test;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;

 /**
  * Tests BKAdmin that it should be able to replicate the failed bookie fragments
  * to target bookie.
  */
 public class TestLedgerFragmentReplication extends BookKeeperClusterTestCase {

     private static final byte[] TEST_PSSWD = "testpasswd".getBytes();
     private static final DigestType TEST_DIGEST_TYPE = BookKeeper.DigestType.CRC32;
     private static Logger LOG = LoggerFactory
             .getLogger(TestLedgerFragmentReplication.class);

     public TestLedgerFragmentReplication() {
         super(3);
     }

     private static class CheckerCallback implements
             GenericCallback<Set<LedgerFragment>> {
         private Set<LedgerFragment> result = null;
         private CountDownLatch latch = new CountDownLatch(1);

         Set<LedgerFragment> waitAndGetResult() throws InterruptedException {
             latch.await();
             return result;
         }

         @Override
         public void operationComplete(int rc, Set<LedgerFragment> result) {
             this.result = result;
             latch.countDown();
         }
     }

     /**
      * Tests that replicate method should replicate the failed bookie fragments
      * to target bookie passed.
      */
     @Test(timeout=60000)
     public void testReplicateLFShouldCopyFailedBookieFragmentsToTargetBookie()
             throws Exception {
         byte[] data = "TestLedgerFragmentReplication".getBytes();
         LedgerHandle lh = bkc.createLedger(3, 3, TEST_DIGEST_TYPE,
                 TEST_PSSWD);

         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }
         InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
                 .get(0L).get(0);

         LOG.info("Killing Bookie", replicaToKill);
         killBookie(replicaToKill);

         int startNewBookie = startNewBookie();
         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }

         InetSocketAddress newBkAddr = new InetSocketAddress(InetAddress
                 .getLocalHost().getHostAddress(), startNewBookie);
         LOG.info("New Bookie addr :" + newBkAddr);
         Set<LedgerFragment> result = getFragmentsToReplicate(lh);

         BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
         lh.close();
         // 0-9 entries should be copy to new bookie

         for (LedgerFragment lf : result) {
             admin.replicateLedgerFragment(lh, lf, newBkAddr);
         }

         // Killing all bookies except newly replicated bookie
         SortedMap<Long, ArrayList<InetSocketAddress>> allBookiesBeforeReplication = lh
                 .getLedgerMetadata().getEnsembles();
         Set<Entry<Long, ArrayList<InetSocketAddress>>> entrySet = allBookiesBeforeReplication
                 .entrySet();
         for (Entry<Long, ArrayList<InetSocketAddress>> entry : entrySet) {
             ArrayList<InetSocketAddress> bookies = entry.getValue();
             for (InetSocketAddress bookie : bookies) {
                 if (newBkAddr.equals(bookie)) {
                     continue;
                 }
                 killBookie(bookie);
             }
         }

         // Should be able to read the entries from 0-9
         verifyRecoveredLedgers(lh, 0, 9);
     }

     /**
      * Tests that fragment re-replication fails on last unclosed ledger
      * fragments.
      */
     @Test(timeout=60000)
     public void testReplicateLFFailsOnlyOnLastUnClosedFragments()
             throws Exception {
         byte[] data = "TestLedgerFragmentReplication".getBytes();
         LedgerHandle lh = bkc.createLedger(3, 3, TEST_DIGEST_TYPE,
                 TEST_PSSWD);

         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }
         InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
                 .get(0L).get(0);

         startNewBookie();
         LOG.info("Killing Bookie", replicaToKill);
         killBookie(replicaToKill);

         // Lets reform ensemble
         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }

         InetSocketAddress replicaToKill2 = lh.getLedgerMetadata()
                 .getEnsembles().get(0L).get(1);

         int startNewBookie2 = startNewBookie();
         LOG.info("Killing Bookie", replicaToKill2);
         killBookie(replicaToKill2);

         InetSocketAddress newBkAddr = new InetSocketAddress(InetAddress
                 .getLocalHost().getHostAddress(), startNewBookie2);
         LOG.info("New Bookie addr :" + newBkAddr);
         Set<LedgerFragment> result = getFragmentsToReplicate(lh);

         BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
         // 0-9 entries should be copy to new bookie

         int unclosedCount = 0;
         for (LedgerFragment lf : result) {
             if (lf.isClosed()) {
                 admin.replicateLedgerFragment(lh, lf, newBkAddr);
             } else {
                 unclosedCount++;
                 try {
                     admin.replicateLedgerFragment(lh, lf, newBkAddr);
                     fail("Shouldn't be able to rereplicate unclosed ledger");
                 } catch (BKException bke) {
                     // correct behaviour
                 }
             }
         }
         assertEquals("Should be only one unclosed fragment", 1, unclosedCount);
     }

     /**
      * Tests that ReplicateLedgerFragment should return false if replication
      * fails
      */
     @Test(timeout=60000)
     public void testReplicateLFShouldReturnFalseIfTheReplicationFails()
             throws Exception {
         byte[] data = "TestLedgerFragmentReplication".getBytes();
         LedgerHandle lh = bkc.createLedger(2, 1, TEST_DIGEST_TYPE,
                 TEST_PSSWD);

         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }

         // Kill the first Bookie
         InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
                 .get(0L).get(0);
         killBookie(replicaToKill);
         LOG.info("Killed Bookie =" + replicaToKill);

         // Write some more entries
         for (int i = 0; i < 10; i++) {
             lh.addEntry(data);
         }
         // Kill the second Bookie
         replicaToKill = lh.getLedgerMetadata().getEnsembles().get(0L).get(0);
         killBookie(replicaToKill);
         LOG.info("Killed Bookie =" + replicaToKill);

         Set<LedgerFragment> fragments = getFragmentsToReplicate(lh);
         BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
         int startNewBookie = startNewBookie();
         InetSocketAddress additionalBK = new InetSocketAddress(InetAddress
                 .getLocalHost().getHostAddress(), startNewBookie);
         for (LedgerFragment lf : fragments) {
             try {
                 admin.replicateLedgerFragment(lh, lf, additionalBK);
             } catch (BKException.BKLedgerRecoveryException e) {
                 // expected
             }
         }
     }

     /**
      * Tests that splitIntoSubFragment should be able to split the original
      * passed fragment into sub fragments at correct boundaries
      */
     @Test(timeout = 30000)
     public void testSplitIntoSubFragmentsWithDifferentFragmentBoundaries()
             throws Exception {
         LedgerMetadata metadata = new LedgerMetadata(3, 3, 3, TEST_DIGEST_TYPE,
                 TEST_PSSWD) {
             @Override
             ArrayList<InetSocketAddress> getEnsemble(long entryId) {
                 return null;
             }

             @Override
             public boolean isClosed() {
                 return true;
             }
         };
         LedgerHandle lh = new LedgerHandle(bkc, 0, metadata, TEST_DIGEST_TYPE,
                 TEST_PSSWD);
         testSplitIntoSubFragments(10, 21, -1, 1, lh);
         testSplitIntoSubFragments(10, 21, 20, 1, lh);
         testSplitIntoSubFragments(0, 0, 10, 1, lh);
         testSplitIntoSubFragments(0, 1, 1, 2, lh);
         testSplitIntoSubFragments(20, 24, 2, 3, lh);
         testSplitIntoSubFragments(21, 32, 3, 4, lh);
         testSplitIntoSubFragments(22, 103, 11, 8, lh);
         testSplitIntoSubFragments(49, 51, 1, 3, lh);
         testSplitIntoSubFragments(11, 101, 3, 31, lh);
     }

     /** assert the sub-fragment boundaries */
     void testSplitIntoSubFragments(final long oriFragmentFirstEntry,
             final long oriFragmentLastEntry, long entriesPerSubFragment,
             long expectedSubFragments, LedgerHandle lh) {
         LedgerFragment fr = new LedgerFragment(lh, oriFragmentFirstEntry,
                 oriFragmentLastEntry, 0) {
             @Override
             public long getLastStoredEntryId() {
                 return oriFragmentLastEntry;
             }

             @Override
             public long getFirstStoredEntryId() {
                 return oriFragmentFirstEntry;
             }
         };
         Set<LedgerFragment> subFragments = LedgerFragmentReplicator
                 .splitIntoSubFragments(lh, fr, entriesPerSubFragment);
         assertEquals(expectedSubFragments, subFragments.size());
         int fullSubFragment = 0;
         int partialSubFragment = 0;
         for (LedgerFragment ledgerFragment : subFragments) {
             if ((ledgerFragment.getLastKnownEntryId()
                     - ledgerFragment.getFirstEntryId() + 1) == entriesPerSubFragment) {
                 fullSubFragment++;
             } else {
                 long totalEntriesToReplicate = oriFragmentLastEntry
                         - oriFragmentFirstEntry + 1;
                 if (entriesPerSubFragment <= 0
                         || totalEntriesToReplicate / entriesPerSubFragment == 0) {
                     assertEquals(
                             "FirstEntryId should be same as original fragment's firstEntryId",
                             fr.getFirstEntryId(), ledgerFragment
                                     .getFirstEntryId());
                     assertEquals(
                             "LastEntryId should be same as original fragment's lastEntryId",
                             fr.getLastKnownEntryId(), ledgerFragment
                                     .getLastKnownEntryId());
                 } else {
                     long partialSplitEntries = totalEntriesToReplicate
                             % entriesPerSubFragment;
                     assertEquals(
                             "Partial fragment with wrong entry boundaries",
                             ledgerFragment.getLastKnownEntryId()
                                     - ledgerFragment.getFirstEntryId() + 1,
                             partialSplitEntries);
                 }
                 partialSubFragment++;
             }
         }
         assertEquals("Unexpected number of sub fargments", fullSubFragment
                 + partialSubFragment, expectedSubFragments);
         assertTrue("There should be only one or zero partial sub Fragment",
                 partialSubFragment == 0 || partialSubFragment == 1);
     }

     private Set<LedgerFragment> getFragmentsToReplicate(LedgerHandle lh)
             throws InterruptedException {
         LedgerChecker checker = new LedgerChecker(bkc);
         CheckerCallback cb = new CheckerCallback();
         checker.checkLedger(lh, cb);
         Set<LedgerFragment> fragments = cb.waitAndGetResult();
         return fragments;
     }

     private void verifyRecoveredLedgers(LedgerHandle lh, long startEntryId,
             long endEntryId) throws BKException, InterruptedException {
         LedgerHandle lhs = bkc.openLedgerNoRecovery(lh.getId(),
                 TEST_DIGEST_TYPE, TEST_PSSWD);
         Enumeration<LedgerEntry> entries = lhs.readEntries(startEntryId,
                 endEntryId);
         assertTrue("Should have the elements", entries.hasMoreElements());
         while (entries.hasMoreElements()) {
             LedgerEntry entry = entries.nextElement();
             assertEquals("TestLedgerFragmentReplication", new String(entry
                     .getEntry()));
         }
     }

 }
	/**
	* 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.bookkeeper.client;

	import java.net.InetAddress;
	import java.net.InetSocketAddress;
	import java.util.ArrayList;
	import java.util.Enumeration;
	import java.util.Set;
	import java.util.SortedMap;
	import java.util.Map.Entry;
	import java.util.concurrent.CountDownLatch;

	import org.apache.bookkeeper.client.BookKeeper.DigestType;
	import org.apache.bookkeeper.proto.BookkeeperInternalCallbacks.GenericCallback;
	import org.apache.bookkeeper.test.BookKeeperClusterTestCase;
	import org.junit.Test;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	/**
	* Tests BKAdmin that it should be able to replicate the failed bookie fragments
	* to target bookie.
	*/
	public class TestLedgerFragmentReplication extends BookKeeperClusterTestCase {

	private static final byte[] TEST_PSSWD = "testpasswd".getBytes();
	private static final DigestType TEST_DIGEST_TYPE = BookKeeper.DigestType.CRC32;
	private static Logger LOG = LoggerFactory
	.getLogger(TestLedgerFragmentReplication.class);

	public TestLedgerFragmentReplication() {
	super(3);
	}

	private static class CheckerCallback implements
	GenericCallback<Set<LedgerFragment>> {
	private Set<LedgerFragment> result = null;
	private CountDownLatch latch = new CountDownLatch(1);

	Set<LedgerFragment> waitAndGetResult() throws InterruptedException {
	latch.await();
	return result;
	}

	@Override
	public void operationComplete(int rc, Set<LedgerFragment> result) {
	this.result = result;
	latch.countDown();
	}
	}

	/**
	* Tests that replicate method should replicate the failed bookie fragments
	* to target bookie passed.
	*/
	@Test(timeout=60000)
	public void testReplicateLFShouldCopyFailedBookieFragmentsToTargetBookie()
	throws Exception {
	byte[] data = "TestLedgerFragmentReplication".getBytes();
	LedgerHandle lh = bkc.createLedger(3, 3, TEST_DIGEST_TYPE,
	TEST_PSSWD);

	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}
	InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
	.get(0L).get(0);

	LOG.info("Killing Bookie", replicaToKill);
	killBookie(replicaToKill);

	int startNewBookie = startNewBookie();
	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}

	InetSocketAddress newBkAddr = new InetSocketAddress(InetAddress
	.getLocalHost().getHostAddress(), startNewBookie);
	LOG.info("New Bookie addr :" + newBkAddr);
	Set<LedgerFragment> result = getFragmentsToReplicate(lh);

	BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
	lh.close();
	// 0-9 entries should be copy to new bookie

	for (LedgerFragment lf : result) {
	admin.replicateLedgerFragment(lh, lf, newBkAddr);
	}

	// Killing all bookies except newly replicated bookie
	SortedMap<Long, ArrayList<InetSocketAddress>> allBookiesBeforeReplication = lh
	.getLedgerMetadata().getEnsembles();
	Set<Entry<Long, ArrayList<InetSocketAddress>>> entrySet = allBookiesBeforeReplication
	.entrySet();
	for (Entry<Long, ArrayList<InetSocketAddress>> entry : entrySet) {
	ArrayList<InetSocketAddress> bookies = entry.getValue();
	for (InetSocketAddress bookie : bookies) {
	if (newBkAddr.equals(bookie)) {
	continue;
	}
	killBookie(bookie);
	}
	}

	// Should be able to read the entries from 0-9
	verifyRecoveredLedgers(lh, 0, 9);
	}

	/**
	* Tests that fragment re-replication fails on last unclosed ledger
	* fragments.
	*/
	@Test(timeout=60000)
	public void testReplicateLFFailsOnlyOnLastUnClosedFragments()
	throws Exception {
	byte[] data = "TestLedgerFragmentReplication".getBytes();
	LedgerHandle lh = bkc.createLedger(3, 3, TEST_DIGEST_TYPE,
	TEST_PSSWD);

	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}
	InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
	.get(0L).get(0);

	startNewBookie();
	LOG.info("Killing Bookie", replicaToKill);
	killBookie(replicaToKill);

	// Lets reform ensemble
	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}

	InetSocketAddress replicaToKill2 = lh.getLedgerMetadata()
	.getEnsembles().get(0L).get(1);

	int startNewBookie2 = startNewBookie();
	LOG.info("Killing Bookie", replicaToKill2);
	killBookie(replicaToKill2);

	InetSocketAddress newBkAddr = new InetSocketAddress(InetAddress
	.getLocalHost().getHostAddress(), startNewBookie2);
	LOG.info("New Bookie addr :" + newBkAddr);
	Set<LedgerFragment> result = getFragmentsToReplicate(lh);

	BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
	// 0-9 entries should be copy to new bookie

	int unclosedCount = 0;
	for (LedgerFragment lf : result) {
	if (lf.isClosed()) {
	admin.replicateLedgerFragment(lh, lf, newBkAddr);
	} else {
	unclosedCount++;
	try {
	admin.replicateLedgerFragment(lh, lf, newBkAddr);
	fail("Shouldn't be able to rereplicate unclosed ledger");
	} catch (BKException bke) {
	// correct behaviour
	}
	}
	}
	assertEquals("Should be only one unclosed fragment", 1, unclosedCount);
	}

	/**
	* Tests that ReplicateLedgerFragment should return false if replication
	* fails
	*/
	@Test(timeout=60000)
	public void testReplicateLFShouldReturnFalseIfTheReplicationFails()
	throws Exception {
	byte[] data = "TestLedgerFragmentReplication".getBytes();
	LedgerHandle lh = bkc.createLedger(2, 1, TEST_DIGEST_TYPE,
	TEST_PSSWD);

	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}

	// Kill the first Bookie
	InetSocketAddress replicaToKill = lh.getLedgerMetadata().getEnsembles()
	.get(0L).get(0);
	killBookie(replicaToKill);
	LOG.info("Killed Bookie =" + replicaToKill);

	// Write some more entries
	for (int i = 0; i < 10; i++) {
	lh.addEntry(data);
	}
	// Kill the second Bookie
	replicaToKill = lh.getLedgerMetadata().getEnsembles().get(0L).get(0);
	killBookie(replicaToKill);
	LOG.info("Killed Bookie =" + replicaToKill);

	Set<LedgerFragment> fragments = getFragmentsToReplicate(lh);
	BookKeeperAdmin admin = new BookKeeperAdmin(baseClientConf);
	int startNewBookie = startNewBookie();
	InetSocketAddress additionalBK = new InetSocketAddress(InetAddress
	.getLocalHost().getHostAddress(), startNewBookie);
	for (LedgerFragment lf : fragments) {
	try {
	admin.replicateLedgerFragment(lh, lf, additionalBK);
	} catch (BKException.BKLedgerRecoveryException e) {
	// expected
	}
	}
	}

	/**
	* Tests that splitIntoSubFragment should be able to split the original
	* passed fragment into sub fragments at correct boundaries
	*/
	@Test(timeout = 30000)
	public void testSplitIntoSubFragmentsWithDifferentFragmentBoundaries()
	throws Exception {
	LedgerMetadata metadata = new LedgerMetadata(3, 3, 3, TEST_DIGEST_TYPE,
	TEST_PSSWD) {
	@Override
	ArrayList<InetSocketAddress> getEnsemble(long entryId) {
	return null;
	}

	@Override
	public boolean isClosed() {
	return true;
	}
	};
	LedgerHandle lh = new LedgerHandle(bkc, 0, metadata, TEST_DIGEST_TYPE,
	TEST_PSSWD);
	testSplitIntoSubFragments(10, 21, -1, 1, lh);
	testSplitIntoSubFragments(10, 21, 20, 1, lh);
	testSplitIntoSubFragments(0, 0, 10, 1, lh);
	testSplitIntoSubFragments(0, 1, 1, 2, lh);
	testSplitIntoSubFragments(20, 24, 2, 3, lh);
	testSplitIntoSubFragments(21, 32, 3, 4, lh);
	testSplitIntoSubFragments(22, 103, 11, 8, lh);
	testSplitIntoSubFragments(49, 51, 1, 3, lh);
	testSplitIntoSubFragments(11, 101, 3, 31, lh);
	}

	/** assert the sub-fragment boundaries */
	void testSplitIntoSubFragments(final long oriFragmentFirstEntry,
	final long oriFragmentLastEntry, long entriesPerSubFragment,
	long expectedSubFragments, LedgerHandle lh) {
	LedgerFragment fr = new LedgerFragment(lh, oriFragmentFirstEntry,
	oriFragmentLastEntry, 0) {
	@Override
	public long getLastStoredEntryId() {
	return oriFragmentLastEntry;
	}

	@Override
	public long getFirstStoredEntryId() {
	return oriFragmentFirstEntry;
	}
	};
	Set<LedgerFragment> subFragments = LedgerFragmentReplicator
	.splitIntoSubFragments(lh, fr, entriesPerSubFragment);
	assertEquals(expectedSubFragments, subFragments.size());
	int fullSubFragment = 0;
	int partialSubFragment = 0;
	for (LedgerFragment ledgerFragment : subFragments) {
	if ((ledgerFragment.getLastKnownEntryId()
	- ledgerFragment.getFirstEntryId() + 1) == entriesPerSubFragment) {
	fullSubFragment++;
	} else {
	long totalEntriesToReplicate = oriFragmentLastEntry
	- oriFragmentFirstEntry + 1;
	if (entriesPerSubFragment <= 0
	\|\| totalEntriesToReplicate / entriesPerSubFragment == 0) {
	assertEquals(
	"FirstEntryId should be same as original fragment's firstEntryId",
	fr.getFirstEntryId(), ledgerFragment
	.getFirstEntryId());
	assertEquals(
	"LastEntryId should be same as original fragment's lastEntryId",
	fr.getLastKnownEntryId(), ledgerFragment
	.getLastKnownEntryId());
	} else {
	long partialSplitEntries = totalEntriesToReplicate
	% entriesPerSubFragment;
	assertEquals(
	"Partial fragment with wrong entry boundaries",
	ledgerFragment.getLastKnownEntryId()
	- ledgerFragment.getFirstEntryId() + 1,
	partialSplitEntries);
	}
	partialSubFragment++;
	}
	}
	assertEquals("Unexpected number of sub fargments", fullSubFragment
	+ partialSubFragment, expectedSubFragments);
	assertTrue("There should be only one or zero partial sub Fragment",
	partialSubFragment == 0 \|\| partialSubFragment == 1);
	}

	private Set<LedgerFragment> getFragmentsToReplicate(LedgerHandle lh)
	throws InterruptedException {
	LedgerChecker checker = new LedgerChecker(bkc);
	CheckerCallback cb = new CheckerCallback();
	checker.checkLedger(lh, cb);
	Set<LedgerFragment> fragments = cb.waitAndGetResult();
	return fragments;
	}

	private void verifyRecoveredLedgers(LedgerHandle lh, long startEntryId,
	long endEntryId) throws BKException, InterruptedException {
	LedgerHandle lhs = bkc.openLedgerNoRecovery(lh.getId(),
	TEST_DIGEST_TYPE, TEST_PSSWD);
	Enumeration<LedgerEntry> entries = lhs.readEntries(startEntryId,
	endEntryId);
	assertTrue("Should have the elements", entries.hasMoreElements());
	while (entries.hasMoreElements()) {
	LedgerEntry entry = entries.nextElement();
	assertEquals("TestLedgerFragmentReplication", new String(entry
	.getEntry()));
	}
	}

	}