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HDFS-12248. SNN will not upload fsimage on IOE and Interrupted exceptions. (Brahma Reddy Battula)

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This commit is contained in:
Brahma Reddy Battula 2017-08-26 13:46:20 +08:00
parent 3bee7046c5
commit bb6a3c8330
3 changed files with 71 additions and 11 deletions
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14
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/CheckpointFaultInjector.java
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@ -24,13 +24,17 @@
* Utility class to faciliate some fault injection tests for the checkpointing
* process.
*/
class CheckpointFaultInjector {
static CheckpointFaultInjector instance = new CheckpointFaultInjector();
public class CheckpointFaultInjector {
public static CheckpointFaultInjector instance =
new CheckpointFaultInjector();
static CheckpointFaultInjector getInstance() {
public static CheckpointFaultInjector getInstance() {
return instance;
}
public static void set(CheckpointFaultInjector instance) {
CheckpointFaultInjector.instance = instance;
}
public void beforeGetImageSetsHeaders() throws IOException {}
public void afterSecondaryCallsRollEditLog() throws IOException {}
public void duringMerge() throws IOException {}
@ -46,4 +50,8 @@ public boolean shouldCorruptAByte(File localfile) {
public void afterMD5Rename() throws IOException {}
public void beforeEditsRename() throws IOException {}
public void duringUploadInProgess() throws InterruptedException, IOException {
}
}

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/StandbyCheckpointer.java
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@ -36,6 +36,7 @@
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.HAUtil;
import org.apache.hadoop.hdfs.server.namenode.CheckpointConf;
import org.apache.hadoop.hdfs.server.namenode.CheckpointFaultInjector;
import org.apache.hadoop.hdfs.server.namenode.FSImage;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeFile;
@ -228,7 +229,9 @@ private void doCheckpoint(boolean sendCheckpoint) throws InterruptedException, I
Future<TransferFsImage.TransferResult> upload =
executor.submit(new Callable<TransferFsImage.TransferResult>() {
@Override
public TransferFsImage.TransferResult call() throws IOException {
public TransferFsImage.TransferResult call()
throws IOException, InterruptedException {
CheckpointFaultInjector.getInstance().duringUploadInProgess();
return TransferFsImage.uploadImageFromStorage(activeNNAddress, conf, namesystem
.getFSImage().getStorage(), imageType, txid, canceler);
}
@ -258,11 +261,12 @@ public TransferFsImage.TransferResult call() throws IOException {
break;
}
}
if (ie == null && ioe == null) {
//Update only when response from remote about success or
lastUploadTime = monotonicNow();
// we are primary if we successfully updated the ANN
this.isPrimaryCheckPointer = success;
}
// cleaner than copying code for multiple catch statements and better than catching all
// exceptions, so we just handle the ones we expect.
if (ie != null || ioe != null) {

48
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestRollingUpgrade.java
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@ -20,6 +20,7 @@
import java.io.File;
import java.io.IOException;
import java.lang.management.ManagementFactory;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ThreadLocalRandom;
import javax.management.AttributeNotFoundException;
@ -46,6 +47,7 @@
import org.apache.hadoop.hdfs.qjournal.MiniQJMHACluster;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.CheckpointFaultInjector;
import org.apache.hadoop.hdfs.server.namenode.FSImage;
import org.apache.hadoop.hdfs.server.namenode.NNStorage;
import org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode;
@ -568,6 +570,52 @@ public void testCheckpointWithMultipleNN() throws IOException, InterruptedExcept
testCheckpoint(3);
}
@Test(timeout = 60000)
public void testRollBackImage() throws Exception {
final Configuration conf = new Configuration();
conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_TXNS_KEY, 10);
conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_CHECK_PERIOD_KEY, 2);
MiniQJMHACluster cluster = null;
CheckpointFaultInjector old = CheckpointFaultInjector.getInstance();
try {
cluster = new MiniQJMHACluster.Builder(conf).setNumNameNodes(2).build();
MiniDFSCluster dfsCluster = cluster.getDfsCluster();
dfsCluster.waitActive();
dfsCluster.transitionToActive(0);
DistributedFileSystem dfs = dfsCluster.getFileSystem(0);
for (int i = 0; i <= 10; i++) {
Path foo = new Path("/foo" + i);
dfs.mkdirs(foo);
}
cluster.getDfsCluster().getNameNodeRpc(0).rollEdits();
CountDownLatch ruEdit = new CountDownLatch(1);
CheckpointFaultInjector.set(new CheckpointFaultInjector() {
@Override
public void duringUploadInProgess()
throws IOException, InterruptedException {
if (ruEdit.getCount() == 1) {
ruEdit.countDown();
Thread.sleep(180000);
}
}
});
ruEdit.await();
RollingUpgradeInfo info = dfs
.rollingUpgrade(RollingUpgradeAction.PREPARE);
Assert.assertTrue(info.isStarted());
FSImage fsimage = dfsCluster.getNamesystem(0).getFSImage();
queryForPreparation(dfs);
// The NN should have a copy of the fsimage in case of rollbacks.
Assert.assertTrue(fsimage.hasRollbackFSImage());
} finally {
CheckpointFaultInjector.set(old);
if (cluster != null) {
cluster.shutdown();
}
}
}
public void testCheckpoint(int nnCount) throws IOException, InterruptedException {
final Configuration conf = new Configuration();
conf.setInt(DFSConfigKeys.DFS_HA_TAILEDITS_PERIOD_KEY, 1);