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HBASE-8207 Replication could have data loss when machine name contains hyphen "-" (Jeffrey) 

git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1462515 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Zhihong Yu 2013-03-29 16:06:51 +00:00
parent 973d38db30
commit 1babc2abbc
3 changed files with 126 additions and 13 deletions
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5
hbase-client/src/main/java/org/apache/hadoop/hbase/replication/ReplicationZookeeper.java
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@ -810,7 +810,10 @@ public class ReplicationZookeeper implements Closeable {
// check the logs queue for the old peer cluster
String oldClusterZnode = ZKUtil.joinZNode(deadRSZnodePath, peerId);
List<String> hlogs = ZKUtil.listChildrenNoWatch(this.zookeeper, oldClusterZnode);
if (hlogs == null || hlogs.size() == 0) continue; // empty log queue.
if (hlogs == null || hlogs.size() == 0) {
listOfOps.add(ZKUtilOp.deleteNodeFailSilent(oldClusterZnode));
continue; // empty log queue.
}
// create the new cluster znode
SortedSet<String> logQueue = new TreeSet<String>();
queues.put(newPeerId, logQueue);

86
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSource.java
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@ -25,6 +25,7 @@ import java.net.ConnectException;
import java.net.SocketTimeoutException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
@ -124,7 +125,7 @@ public class ReplicationSource extends Thread
// Indicates if this queue is recovered (and will be deleted when depleted)
private boolean queueRecovered;
// List of all the dead region servers that had this queue (if recovered)
private String[] deadRegionServers;
private List<String> deadRegionServers = new ArrayList<String>();
// Maximum number of retries before taking bold actions
private int maxRetriesMultiplier;
// Socket timeouts require even bolder actions since we don't want to DDOS
@ -201,19 +202,83 @@ public class ReplicationSource extends Thread
// The passed znode will be either the id of the peer cluster or
// the handling story of that queue in the form of id-servername-*
private void checkIfQueueRecovered(String peerClusterZnode) {
String[] parts = peerClusterZnode.split("-");
//
// package access for testing
void checkIfQueueRecovered(String peerClusterZnode) {
String[] parts = peerClusterZnode.split("-", 2);
this.queueRecovered = parts.length != 1;
this.peerId = this.queueRecovered ?
parts[0] : peerClusterZnode;
this.peerClusterZnode = peerClusterZnode;
this.deadRegionServers = new String[parts.length-1];
// Extract all the places where we could find the hlogs
for (int i = 1; i < parts.length; i++) {
this.deadRegionServers[i-1] = parts[i];
if (parts.length < 2) {
// not queue recovered situation
return;
}
// extract dead servers
extracDeadServersFromZNodeString(parts[1], this.deadRegionServers);
}
/**
* for tests only
*/
List<String> getDeadRegionServers() {
return Collections.unmodifiableList(this.deadRegionServers);
}
/**
* Parse dead server names from znode string servername can contain "-" such as
* "ip-10-46-221-101.ec2.internal", so we need skip some "-" during parsing for the following
* cases: 2-ip-10-46-221-101.ec2.internal,52170,1364333181125-<server name>-...
*/
private static void
extracDeadServersFromZNodeString(String deadServerListStr, List<String> result) {
if(deadServerListStr == null || result == null || deadServerListStr.isEmpty()) return;
// valid server name delimiter "-" has to be after "," in a server name
int seenCommaCnt = 0;
int startIndex = 0;
int len = deadServerListStr.length();
for (int i = 0; i < len; i++) {
switch (deadServerListStr.charAt(i)) {
case ',':
seenCommaCnt += 1;
break;
case '-':
if(seenCommaCnt>=2) {
if (i > startIndex) {
String serverName = deadServerListStr.substring(startIndex, i);
if(ServerName.isFullServerName(serverName)){
result.add(serverName);
} else {
LOG.error("Found invalid server name:" + serverName);
}
startIndex = i + 1;
}
seenCommaCnt = 0;
}
break;
default:
break;
}
}
// add tail
if(startIndex < len - 1){
String serverName = deadServerListStr.substring(startIndex, len);
if(ServerName.isFullServerName(serverName)){
result.add(serverName);
} else {
LOG.error("Found invalid server name at the end:" + serverName);
}
}
LOG.debug("Found dead servers:" + result);
}
/**
* Select a number of peers at random using the ratio. Mininum 1.
*/
@ -509,11 +574,10 @@ public class ReplicationSource extends Thread
// We didn't find the log in the archive directory, look if it still
// exists in the dead RS folder (there could be a chain of failures
// to look at)
LOG.info("NB dead servers : " + deadRegionServers.length);
for (int i = this.deadRegionServers.length - 1; i >= 0; i--) {
LOG.info("NB dead servers : " + deadRegionServers.size());
for (String curDeadServerName : deadRegionServers) {
Path deadRsDirectory =
new Path(manager.getLogDir().getParent(), this.deadRegionServers[i]);
new Path(manager.getLogDir().getParent(), curDeadServerName);
Path[] locs = new Path[] {
new Path(deadRsDirectory, currentPath.getName()),
new Path(deadRsDirectory.suffix(HLog.SPLITTING_EXT),

48
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/TestReplicationSourceManager.java
View File

@ -19,6 +19,7 @@
package org.apache.hadoop.hbase.replication.regionserver;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.net.URLEncoder;
import java.util.ArrayList;
@ -266,6 +267,51 @@ public class TestReplicationSourceManager {
server.abort("", null);
}
@Test
public void testNodeFailoverDeadServerParsing() throws Exception {
LOG.debug("testNodeFailoverDeadServerParsing");
conf.setBoolean(HConstants.ZOOKEEPER_USEMULTI, true);
final Server server = new DummyServer("ec2-54-234-230-108.compute-1.amazonaws.com");
AtomicBoolean replicating = new AtomicBoolean(true);
ReplicationZookeeper rz = new ReplicationZookeeper(server, replicating);
// populate some znodes in the peer znode
files.add("log1");
files.add("log2");
for (String file : files) {
rz.addLogToList(file, "1");
}
// create 3 DummyServers
Server s1 = new DummyServer("ip-10-8-101-114.ec2.internal");
Server s2 = new DummyServer("ec2-107-20-52-47.compute-1.amazonaws.com");
Server s3 = new DummyServer("ec2-23-20-187-167.compute-1.amazonaws.com");
// simulate three servers fail sequentially
ReplicationZookeeper rz1 = new ReplicationZookeeper(s1, new AtomicBoolean(true));
SortedMap<String, SortedSet<String>> testMap =
rz1.copyQueuesFromRSUsingMulti(server.getServerName().getServerName());
rz1.close();
ReplicationZookeeper rz2 = new ReplicationZookeeper(s2, new AtomicBoolean(true));
testMap = rz2.copyQueuesFromRSUsingMulti(s1.getServerName().getServerName());
rz2.close();
ReplicationZookeeper rz3 = new ReplicationZookeeper(s3, new AtomicBoolean(true));
testMap = rz3.copyQueuesFromRSUsingMulti(s2.getServerName().getServerName());
rz3.close();
ReplicationSource s = new ReplicationSource();
s.checkIfQueueRecovered(testMap.firstKey());
List<String> result = s.getDeadRegionServers();
// verify
assertTrue(result.contains(server.getServerName().getServerName()));
assertTrue(result.contains(s1.getServerName().getServerName()));
assertTrue(result.contains(s2.getServerName().getServerName()));
// close out the resources.
rz.close();
server.abort("", null);
}
static class DummyNodeFailoverWorker extends Thread {
private SortedMap<String, SortedSet<String>> logZnodesMap;
Server server;
@ -341,7 +387,7 @@ public class TestReplicationSourceManager {
@Override
public ServerName getServerName() {
return new ServerName(hostname, 1234, -1L);
return new ServerName(hostname, 1234, 1L);
}
@Override