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HDFS-6715. Webhdfs wont fail over when it gets java.io.IOException: Namenode is in startup mode. Contributed by Jing Zhao. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1613237 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jing Zhao 2014-07-24 18:28:00 +00:00
parent a7855e1c33
commit 8c6e172a0a
4 changed files with 112 additions and 9 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -367,6 +367,9 @@ Release 2.6.0 - UNRELEASED
HDFS-6455. NFS: Exception should be added in NFS log for invalid separator in
nfs.exports.allowed.hosts. (Abhiraj Butala via brandonli)
HDFS-6715. Webhdfs wont fail over when it gets java.io.IOException: Namenode
is in startup mode. (jing9)
Release 2.5.0 - UNRELEASED
INCOMPATIBLE CHANGES

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
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@ -113,6 +113,7 @@ import org.apache.hadoop.hdfs.web.resources.XAttrNameParam;
import org.apache.hadoop.hdfs.web.resources.XAttrSetFlagParam;
import org.apache.hadoop.hdfs.web.resources.XAttrValueParam;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.RetriableException;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.NetworkTopology.InvalidTopologyException;
import org.apache.hadoop.net.Node;
@ -190,7 +191,7 @@ public class NamenodeWebHdfsMethods {
throws IOException {
final NamenodeProtocols np = namenode.getRpcServer();
if (np == null) {
throw new IOException("Namenode is in startup mode");
throw new RetriableException("Namenode is in startup mode");
}
return np;
}

39
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFS.java
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@ -39,14 +39,18 @@ import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.TestDFSClientRetries;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.snapshot.SnapshotTestHelper;
import org.apache.hadoop.hdfs.server.namenode.web.resources.NamenodeWebHdfsMethods;
import org.apache.hadoop.hdfs.TestDFSClientRetries;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.ipc.RetriableException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.test.GenericTestUtils;
import org.apache.log4j.Level;
import org.junit.Assert;
import org.junit.Test;
import org.mockito.internal.util.reflection.Whitebox;
/** Test WebHDFS */
public class TestWebHDFS {
@ -445,4 +449,37 @@ public class TestWebHDFS {
}
}
}
/**
* Make sure a RetriableException is thrown when rpcServer is null in
* NamenodeWebHdfsMethods.
*/
@Test
public void testRaceWhileNNStartup() throws Exception {
MiniDFSCluster cluster = null;
final Configuration conf = WebHdfsTestUtil.createConf();
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0).build();
cluster.waitActive();
final NameNode namenode = cluster.getNameNode();
final NamenodeProtocols rpcServer = namenode.getRpcServer();
Whitebox.setInternalState(namenode, "rpcServer", null);
final Path foo = new Path("/foo");
final FileSystem webHdfs = WebHdfsTestUtil.getWebHdfsFileSystem(conf,
WebHdfsFileSystem.SCHEME);
try {
webHdfs.mkdirs(foo);
fail("Expected RetriableException");
} catch (RetriableException e) {
GenericTestUtils.assertExceptionContains("Namenode is in startup mode",
e);
}
Whitebox.setInternalState(namenode, "rpcServer", rpcServer);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}

76
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFSForHA.java
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@ -18,6 +18,15 @@
package org.apache.hadoop.hdfs.web;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
@ -29,18 +38,14 @@ import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.ha.HATestUtil;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.security.token.Token;
import org.junit.Assert;
import org.junit.Test;
import java.io.IOException;
import java.net.URI;
import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.verify;
import org.mockito.internal.util.reflection.Whitebox;
public class TestWebHDFSForHA {
private static final String LOGICAL_NAME = "minidfs";
@ -182,4 +187,61 @@ public class TestWebHDFSForHA {
}
}
}
/**
* Make sure the WebHdfsFileSystem will retry based on RetriableException when
* rpcServer is null in NamenodeWebHdfsMethods while NameNode starts up.
*/
@Test (timeout=120000)
public void testRetryWhileNNStartup() throws Exception {
final Configuration conf = DFSTestUtil.newHAConfiguration(LOGICAL_NAME);
MiniDFSCluster cluster = null;
final Map<String, Boolean> resultMap = new HashMap<String, Boolean>();
try {
cluster = new MiniDFSCluster.Builder(conf).nnTopology(topo)
.numDataNodes(0).build();
HATestUtil.setFailoverConfigurations(cluster, conf, LOGICAL_NAME);
cluster.waitActive();
cluster.transitionToActive(0);
final NameNode namenode = cluster.getNameNode(0);
final NamenodeProtocols rpcServer = namenode.getRpcServer();
Whitebox.setInternalState(namenode, "rpcServer", null);
new Thread() {
@Override
public void run() {
boolean result = false;
FileSystem fs = null;
try {
fs = FileSystem.get(WEBHDFS_URI, conf);
final Path dir = new Path("/test");
result = fs.mkdirs(dir);
} catch (IOException e) {
result = false;
} finally {
IOUtils.cleanup(null, fs);
}
synchronized (TestWebHDFSForHA.this) {
resultMap.put("mkdirs", result);
TestWebHDFSForHA.this.notifyAll();
}
}
}.start();
Thread.sleep(1000);
Whitebox.setInternalState(namenode, "rpcServer", rpcServer);
synchronized (this) {
while (!resultMap.containsKey("mkdirs")) {
this.wait();
}
Assert.assertTrue(resultMap.get("mkdirs"));
}
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}