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HDFS-15998. Fix NullPointException In listOpenFiles (#3036) 

Co-authored-by: huhaiyang <huhaiyang@didichuxing.com>
(cherry picked from commit b38b00e528)
This commit is contained in:
huhaiyang 2021-06-01 15:26:47 +08:00 committed by Wei-Chiu Chuang
parent 5cebd02bbe
commit ede03cc35c
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4 changed files with 112 additions and 3 deletions
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8
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
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@ -1953,8 +1953,14 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
continue;
}
Preconditions.checkState(ucFile instanceof INodeFile);
openFileIds.add(ucFileId);
INodeFile inodeFile = ucFile.asFile();
if (!inodeFile.isUnderConstruction()) {
LOG.warn("The file {} is not under construction but has lease.",
inodeFile.getFullPathName());
continue;
}
openFileIds.add(ucFileId);
String fullPathName = inodeFile.getFullPathName();
if (org.apache.commons.lang3.StringUtils.isEmpty(path)

9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/LeaseManager.java
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@ -300,8 +300,13 @@ public class LeaseManager {
Iterator<Long> inodeIdIterator = inodeIds.iterator();
while (inodeIdIterator.hasNext()) {
Long inodeId = inodeIdIterator.next();
final INodeFile inodeFile =
fsnamesystem.getFSDirectory().getInode(inodeId).asFile();
INode ucFile = fsnamesystem.getFSDirectory().getInode(inodeId);
if (ucFile == null) {
//probably got deleted
continue;
}
final INodeFile inodeFile = ucFile.asFile();
if (!inodeFile.isUnderConstruction()) {
LOG.warn("The file {} is not under construction but has lease.",
inodeFile.getFullPathName());

67
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDecommission.java
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@ -37,6 +37,7 @@ import java.util.Scanner;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.regex.Pattern;
import java.util.EnumSet;
import java.util.function.Supplier;
import org.apache.hadoop.thirdparty.com.google.common.collect.Lists;
@ -46,6 +47,7 @@ import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
@ -55,6 +57,8 @@ import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.protocol.OpenFileEntry;
import org.apache.hadoop.hdfs.protocol.OpenFilesIterator;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManager;
import org.apache.hadoop.hdfs.server.blockmanagement.BlockManagerTestUtil;
@ -867,6 +871,69 @@ public class TestDecommission extends AdminStatesBaseTest {
closedFileSet, openFilesMap, 0);
}
/**
* Verify Decommission In Progress with List Open Files
* 1. start decommissioning a node (set LeavingServiceStatus)
* 2. close file with decommissioning
* @throws Exception
*/
@Test(timeout=180000)
public void testDecommissionWithCloseFileAndListOpenFiles()
throws Exception {
LOG.info("Starting test testDecommissionWithCloseFileAndListOpenFiles");
// Disable redundancy monitor check so that open files blocking
// decommission can be listed and verified.
getConf().setInt(
DFSConfigKeys.DFS_NAMENODE_REDUNDANCY_INTERVAL_SECONDS_KEY, 1000);
getConf().setLong(
DFSConfigKeys.DFS_NAMENODE_LIST_OPENFILES_NUM_RESPONSES, 1);
startSimpleCluster(1, 3);
FileSystem fileSys = getCluster().getFileSystem(0);
FSNamesystem ns = getCluster().getNamesystem(0);
Path file = new Path("/openFile");
FSDataOutputStream st = AdminStatesBaseTest.writeIncompleteFile(fileSys,
file, (short)3, (short)(fileSize / blockSize));
for (DataNode d: getCluster().getDataNodes()) {
DataNodeTestUtils.triggerBlockReport(d);
}
LocatedBlocks lbs = NameNodeAdapter.getBlockLocations(
getCluster().getNameNode(0), file.toUri().getPath(),
0, blockSize * 10);
DatanodeInfo dnToDecommission = lbs.getLastLocatedBlock().getLocations()[0];
DatanodeManager dm = ns.getBlockManager().getDatanodeManager();
dnToDecommission = dm.getDatanode(dnToDecommission.getDatanodeUuid());
initExcludeHost(dnToDecommission.getXferAddr());
refreshNodes(0);
BlockManagerTestUtil.recheckDecommissionState(dm);
waitNodeState(dnToDecommission, AdminStates.DECOMMISSION_INPROGRESS);
Thread.sleep(3000);
//Make sure DatanodeAdminMonitor(DatanodeAdminBackoffMonitor) At least twice run.
BatchedEntries<OpenFileEntry> batchedListEntries = getCluster().
getNameNodeRpc(0).listOpenFiles(0,
EnumSet.of(OpenFilesIterator.OpenFilesType.BLOCKING_DECOMMISSION),
OpenFilesIterator.FILTER_PATH_DEFAULT);
assertEquals(1, batchedListEntries.size());
st.close(); //close file
try {
batchedListEntries = getCluster().getNameNodeRpc().listOpenFiles(0,
EnumSet.of(OpenFilesIterator.OpenFilesType.BLOCKING_DECOMMISSION),
OpenFilesIterator.FILTER_PATH_DEFAULT);
assertEquals(0, batchedListEntries.size());
} catch (NullPointerException e) {
Assert.fail("Should not throw NPE when the file is not under " +
"construction but has lease!");
}
initExcludeHost("");
refreshNodes(0);
fileSys.delete(file, false);
}
@Test(timeout = 360000)
public void testDecommissionWithOpenFileAndBlockRecovery()
throws IOException, InterruptedException {

31
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/TestListOpenFiles.java
View File

@ -54,9 +54,11 @@ import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.tools.DFSAdmin;
import org.apache.hadoop.util.ToolRunner;
import org.apache.hadoop.util.ChunkedArrayList;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.Assert;
/**
* Verify open files listing.
@ -321,4 +323,33 @@ public class TestListOpenFiles {
"hdfs://non-cluster/"));
fs.listOpenFiles(EnumSet.of(OpenFilesType.ALL_OPEN_FILES), "/path");
}
@Test
public void testListOpenFilesWithDeletedPath() throws Exception {
HashMap<Path, FSDataOutputStream> openFiles = new HashMap<>();
openFiles.putAll(
DFSTestUtil.createOpenFiles(fs, new Path("/"), "open-1", 1));
BatchedEntries<OpenFileEntry> openFileEntryBatchedEntries = nnRpc
.listOpenFiles(0, EnumSet.of(OpenFilesType.ALL_OPEN_FILES),
OpenFilesIterator.FILTER_PATH_DEFAULT);
assertEquals(1, openFileEntryBatchedEntries.size());
String path = openFileEntryBatchedEntries.get(0).getFilePath();
FSNamesystem fsNamesystem = cluster.getNamesystem();
FSDirectory dir = fsNamesystem.getFSDirectory();
List<INode> removedINodes = new ChunkedArrayList<>();
removedINodes.add(dir.getINode(path));
fsNamesystem.writeLock();
try {
dir.removeFromInodeMap(removedINodes);
openFileEntryBatchedEntries = nnRpc
.listOpenFiles(0, EnumSet.of(OpenFilesType.ALL_OPEN_FILES),
OpenFilesIterator.FILTER_PATH_DEFAULT);
assertEquals(0, openFileEntryBatchedEntries.size());
fsNamesystem.leaseManager.removeLease(dir.getINode(path).getId());
} catch (NullPointerException e) {
Assert.fail("Should not throw NPE when the file is deleted but has lease!");
} finally {
fsNamesystem.writeUnlock();
}
}
}