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HDFS-5241. Provide alternate queuing audit logger to reduce logging contention (daryn) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1560761 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Daryn Sharp 2014-01-23 17:15:27 +00:00
parent ff43021946
commit a4e66e09e9
4 changed files with 81 additions and 5 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -511,6 +511,9 @@ Release 2.4.0 - UNRELEASED
HDFS-5681. renewLease should not hold fsn write lock. (daryn via Kihwal)
HDFS-5241. Provide alternate queuing audit logger to reduce logging
contention (daryn)
BUG FIXES
HDFS-5034. Remove debug prints from GetFileLinkInfo (Andrew Wang via Colin

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
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@ -304,6 +304,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final String DFS_NAMENODE_DEFAULT_AUDIT_LOGGER_NAME = "default";
public static final String DFS_NAMENODE_AUDIT_LOG_TOKEN_TRACKING_ID_KEY = "dfs.namenode.audit.log.token.tracking.id";
public static final boolean DFS_NAMENODE_AUDIT_LOG_TOKEN_TRACKING_ID_DEFAULT = false;
public static final String DFS_NAMENODE_AUDIT_LOG_ASYNC_KEY = "dfs.namenode.audit.log.async";
public static final boolean DFS_NAMENODE_AUDIT_LOG_ASYNC_DEFAULT = false;
// Much code in hdfs is not yet updated to use these keys.
public static final String DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY = "dfs.client.block.write.locateFollowingBlock.retries";

32
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -38,6 +38,8 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECI
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AUDIT_LOGGERS_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AUDIT_LOG_TOKEN_TRACKING_ID_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AUDIT_LOG_TOKEN_TRACKING_ID_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AUDIT_LOG_ASYNC_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_AUDIT_LOG_ASYNC_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_TXNS_DEFAULT;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_TXNS_KEY;
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_NAMENODE_DEFAULT_AUDIT_LOGGER_NAME;
@ -122,6 +124,7 @@ import javax.management.StandardMBean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
@ -250,6 +253,9 @@ import org.apache.hadoop.util.DataChecksum;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.util.Time;
import org.apache.hadoop.util.VersionInfo;
import org.apache.log4j.Appender;
import org.apache.log4j.AsyncAppender;
import org.apache.log4j.Logger;
import org.mortbay.util.ajax.JSON;
import com.google.common.annotations.VisibleForTesting;
@ -654,6 +660,11 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
*/
FSNamesystem(Configuration conf, FSImage fsImage, boolean ignoreRetryCache)
throws IOException {
if (conf.getBoolean(DFS_NAMENODE_AUDIT_LOG_ASYNC_KEY,
DFS_NAMENODE_AUDIT_LOG_ASYNC_DEFAULT)) {
LOG.info("Enabling async auditlog");
enableAsyncAuditLog();
}
boolean fair = conf.getBoolean("dfs.namenode.fslock.fair", true);
LOG.info("fsLock is fair:" + fair);
fsLock = new FSNamesystemLock(fair);
@ -7389,5 +7400,26 @@ public class FSNamesystem implements Namesystem, FSClusterStats,
auditLog.info(message);
}
}
private static void enableAsyncAuditLog() {
if (!(auditLog instanceof Log4JLogger)) {
LOG.warn("Log4j is required to enable async auditlog");
return;
}
Logger logger = ((Log4JLogger)auditLog).getLogger();
@SuppressWarnings("unchecked")
List<Appender> appenders = Collections.list(logger.getAllAppenders());
// failsafe against trying to async it more than once
if (!appenders.isEmpty() && !(appenders.get(0) instanceof AsyncAppender)) {
AsyncAppender asyncAppender = new AsyncAppender();
// change logger to have an async appender containing all the
// previously configured appenders
for (Appender appender : appenders) {
logger.removeAppender(appender);
asyncAppender.addAppender(appender);
}
logger.addAppender(asyncAppender);
}
}
}

49
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestAuditLogs.java
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@ -18,16 +18,17 @@
package org.apache.hadoop.hdfs.server.namenode;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assert.*;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.regex.Pattern;
import org.apache.commons.logging.impl.Log4JLogger;
@ -46,6 +47,8 @@ import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
import org.apache.hadoop.security.AccessControlException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.test.PathUtils;
import org.apache.log4j.Appender;
import org.apache.log4j.AsyncAppender;
import org.apache.log4j.Level;
import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
@ -54,13 +57,30 @@ import org.apache.log4j.RollingFileAppender;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
/**
* A JUnit test that audit logs are generated
*/
@RunWith(Parameterized.class)
public class TestAuditLogs {
static final String auditLogFile = PathUtils.getTestDirName(TestAuditLogs.class) + "/TestAuditLogs-audit.log";
boolean useAsyncLog;
@Parameters
public static Collection<Object[]> data() {
Collection<Object[]> params = new ArrayList<Object[]>();
params.add(new Object[]{new Boolean(false)});
params.add(new Object[]{new Boolean(true)});
return params;
}
public TestAuditLogs(boolean useAsyncLog) {
this.useAsyncLog = useAsyncLog;
}
// Pattern for:
// allowed=(true|false) ugi=name ip=/address cmd={cmd} src={path} dst=null perm=null
static final Pattern auditPattern = Pattern.compile(
@ -84,17 +104,28 @@ public class TestAuditLogs {
@Before
public void setupCluster() throws Exception {
// must configure prior to instantiating the namesystem because it
// will reconfigure the logger if async is enabled
configureAuditLogs();
conf = new HdfsConfiguration();
final long precision = 1L;
conf.setLong(DFSConfigKeys.DFS_NAMENODE_ACCESSTIME_PRECISION_KEY, precision);
conf.setLong(DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY, 10000L);
conf.setBoolean(DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY, true);
conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_AUDIT_LOG_ASYNC_KEY, useAsyncLog);
util = new DFSTestUtil.Builder().setName("TestAuditAllowed").
setNumFiles(20).build();
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(4).build();
fs = cluster.getFileSystem();
util.createFiles(fs, fileName);
// make sure the appender is what it's supposed to be
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
@SuppressWarnings("unchecked")
List<Appender> appenders = Collections.list(logger.getAllAppenders());
assertEquals(1, appenders.size());
assertEquals(useAsyncLog, appenders.get(0) instanceof AsyncAppender);
fnames = util.getFileNames(fileName);
util.waitReplication(fs, fileName, (short)3);
userGroupInfo = UserGroupInformation.createUserForTesting(username, groups);
@ -203,6 +234,7 @@ public class TestAuditLogs {
try {
hftpFs = (HftpFileSystem) new Path(hftpUri).getFileSystem(conf);
InputStream istream = hftpFs.open(file);
@SuppressWarnings("unused")
int val = istream.read();
istream.close();
@ -234,6 +266,12 @@ public class TestAuditLogs {
/** Sets up log4j logger for auditlogs */
private void setupAuditLogs() throws IOException {
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
// enable logging now that the test is ready to run
logger.setLevel(Level.INFO);
}
private void configureAuditLogs() throws IOException {
// Shutdown the LogManager to release all logger open file handles.
// Unfortunately, Apache commons logging library does not provide
// means to release underlying loggers. For additional info look up
@ -245,7 +283,8 @@ public class TestAuditLogs {
assertTrue(file.delete());
}
Logger logger = ((Log4JLogger) FSNamesystem.auditLog).getLogger();
logger.setLevel(Level.INFO);
// disable logging while the cluster startup preps files
logger.setLevel(Level.OFF);
PatternLayout layout = new PatternLayout("%m%n");
RollingFileAppender appender = new RollingFileAppender(layout, auditLogFile);
logger.addAppender(appender);