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HBASE-17460 enable_table_replication can not perform cyclic replication of a table (NITIN VERMA)

This commit is contained in:
tedyu 2017-02-10 14:54:05 -08:00
parent 054acec840
commit d51e287877
4 changed files with 128 additions and 15 deletions
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2
hbase-client/src/main/java/org/apache/hadoop/hbase/HColumnDescriptor.java
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@ -1076,7 +1076,7 @@ public class HColumnDescriptor implements Comparable<HColumnDescriptor> {
public int compareTo(HColumnDescriptor o) {
int result = Bytes.compareTo(this.name, o.getName());
if (result == 0) {
// punt on comparison for ordering, just calculate difference
// punt on comparison for ordering, just calculate difference.
result = this.values.hashCode() - o.values.hashCode();
if (result < 0)
result = -1;

102
hbase-client/src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java
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@ -40,9 +40,9 @@ import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.client.Durability;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.exceptions.DeserializationException;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.HBaseProtos.TableSchema;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.util.Bytes;
/**
@ -1041,6 +1041,106 @@ public class HTableDescriptor implements Comparable<HTableDescriptor> {
return compareTo((HTableDescriptor)obj) == 0;
}
/**
* Detects whether replication has been already enabled on any of the column families of this
* table descriptor.
* @return true if any of the column families has replication enabled.
*/
public boolean isReplicationEnabled() {
// Go through each Column-Family descriptor and check if the
// Replication has been enabled already.
// Return 'true' if replication has been enabled on any CF,
// otherwise return 'false'.
//
boolean result = false;
Iterator<HColumnDescriptor> it = this.families.values().iterator();
while (it.hasNext()) {
HColumnDescriptor tempHcd = it.next();
if (tempHcd.getScope() != HConstants.REPLICATION_SCOPE_LOCAL) {
result = true;
break;
}
}
return result;
}
/**
* Compare the contents of the descriptor with another one passed as a parameter for replication
* purpose. The REPLICATION_SCOPE field is ignored during comparison.
* @param obj descriptor on source cluster which needs to be replicated.
* @return true if the contents of the two descriptors match (ignoring just REPLICATION_SCOPE).
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean compareForReplication(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (!(obj instanceof HTableDescriptor)) {
return false;
}
boolean result = false;
// Create a copy of peer HTD as we need to change its replication
// scope to match with the local HTD.
HTableDescriptor peerHtdCopy = new HTableDescriptor(this);
// Copy the replication scope of local Htd to remote Htd.
HTableDescriptor localHtd = (HTableDescriptor) obj;
result = (peerHtdCopy.copyReplicationScope(localHtd) == 0);
// If copy was successful, compare the two tables now.
if (result == true) {
result = (peerHtdCopy.compareTo(localHtd) == 0);
}
return result;
}
/**
* Copies the REPLICATION_SCOPE of table descriptor passed as an argument. Before copy, the method
* ensures that the name of table and column-families should match.
* @param localHtd - The HTableDescriptor of table from source cluster.
* @return 0 If the name of table and column families match and REPLICATION_SCOPE copied
* successfully. 1 If there is any mismatch in the names.
*/
public int copyReplicationScope(final HTableDescriptor localHtd)
{
// Copy the REPLICATION_SCOPE only when table names and the names of
// Column-Families are same.
int result = this.name.compareTo(localHtd.name);
if (result == 0) {
Iterator<HColumnDescriptor> remoteHCDIter = families.values().iterator();
Iterator<HColumnDescriptor> localHCDIter = localHtd.families.values().iterator();
while (remoteHCDIter.hasNext() && localHCDIter.hasNext()) {
HColumnDescriptor remoteHCD = remoteHCDIter.next();
HColumnDescriptor localHCD = localHCDIter.next();
String remoteHCDName = remoteHCD.getNameAsString();
String localHCDName = localHCD.getNameAsString();
if (remoteHCDName.equals(localHCDName))
{
remoteHCD.setScope(localHCD.getScope());
}
else {
result = -1;
break;
}
}
}
return result;
}
/**
* @see java.lang.Object#hashCode()
*/

31
hbase-client/src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java
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@ -29,7 +29,6 @@ import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
@ -4087,7 +4086,9 @@ public class HBaseAdmin implements Admin {
* Connect to peer and check the table descriptor on peer:
* <ol>
* <li>Create the same table on peer when not exist.</li>
* <li>Throw exception if the table exists on peer cluster but descriptors are not same.</li>
* <li>Throw an exception if the table already has replication enabled on any of the column
* families.</li>
* <li>Throw an exception if the table exists on peer cluster but descriptors are not same.</li>
* </ol>
* @param tableName name of the table to sync to the peer
* @param splits table split keys
@ -4105,20 +4106,32 @@ public class HBaseAdmin implements Admin {
Configuration peerConf = getPeerClusterConfiguration(peerDesc);
try (Connection conn = ConnectionFactory.createConnection(peerConf);
Admin repHBaseAdmin = conn.getAdmin()) {
HTableDescriptor htd = getTableDescriptor(tableName);
HTableDescriptor localHtd = getTableDescriptor(tableName);
HTableDescriptor peerHtd = null;
if (!repHBaseAdmin.tableExists(tableName)) {
repHBaseAdmin.createTable(htd, splits);
repHBaseAdmin.createTable(localHtd, splits);
} else {
peerHtd = repHBaseAdmin.getTableDescriptor(tableName);
if (peerHtd == null) {
throw new IllegalArgumentException("Failed to get table descriptor for table "
+ tableName.getNameAsString() + " from peer cluster " + peerDesc.getPeerId());
} else if (!peerHtd.equals(htd)) {
throw new IllegalArgumentException("Table " + tableName.getNameAsString()
+ " exists in peer cluster " + peerDesc.getPeerId()
+ ", but the table descriptors are not same when compared with source cluster."
+ " Thus can not enable the table's replication switch.");
} else {
// To support cyclic replication (HBASE-17460), we need to match the
// REPLICATION_SCOPE of table on both the clusters. We should do this
// only when the replication is not already enabled on local HTD (local
// table on this cluster).
//
if (localHtd.isReplicationEnabled()) {
throw new IllegalArgumentException("Table " + tableName.getNameAsString()
+ " has replication already enabled for atleast one Column Family.");
} else {
if (!peerHtd.compareForReplication(localHtd)) {
throw new IllegalArgumentException("Table " + tableName.getNameAsString()
+ " exists in peer cluster " + peerDesc.getPeerId()
+ ", but the table descriptors are not same when compared with source cluster."
+ " Thus can not enable the table's replication switch.");
}
}
}
}
}

8
hbase-client/src/main/java/org/apache/hadoop/hbase/client/replication/ReplicationAdmin.java
View File

@ -18,9 +18,6 @@
*/
package org.apache.hadoop.hbase.client.replication;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayList;
@ -29,9 +26,9 @@ import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@ -62,6 +59,9 @@ import org.apache.hadoop.hbase.replication.ReplicationQueuesClientArguments;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
/**
* <p>
* This class provides the administrative interface to HBase cluster