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HDFS-16923. [SBN read] getlisting RPC to observer will throw NPE if path does not exist (#5400) 

Signed-off-by: Erik Krogen <xkrogen@apache.org>

(cherry picked from commit 6bd2444815)
This commit is contained in:
ZanderXu 2023-03-02 08:18:38 +08:00 committed by Erik Krogen
parent 91ce13ea01
commit a7c1fad0c9
2 changed files with 13 additions and 1 deletions
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2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSNamesystem.java
View File

@ -4090,7 +4090,7 @@ public class FSNamesystem implements Namesystem, FSNamesystemMBean,
logAuditEvent(false, operationName, src);
throw e;
}
if (needLocation && isObserver()) {
if (dl != null && needLocation && isObserver()) {
for (HdfsFileStatus fs : dl.getPartialListing()) {
if (fs instanceof HdfsLocatedFileStatus) {
LocatedBlocks lbs = ((HdfsLocatedFileStatus) fs).getLocatedBlocks();

12
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/ha/TestObserverNode.java
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@ -64,6 +64,7 @@ import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
import org.apache.hadoop.hdfs.server.namenode.TestFsck;
import org.apache.hadoop.hdfs.tools.GetGroups;
import org.apache.hadoop.ipc.ObserverRetryOnActiveException;
import org.apache.hadoop.test.LambdaTestUtils;
import org.apache.hadoop.util.Time;
import org.apache.hadoop.util.concurrent.HadoopExecutors;
import org.junit.After;
@ -608,6 +609,17 @@ public class TestObserverNode {
}
}
@Test
public void testGetListingForDeletedDir() throws Exception {
Path path = new Path("/dir1/dir2/testFile");
dfs.create(path).close();
assertTrue(dfs.delete(new Path("/dir1/dir2"), true));
LambdaTestUtils.intercept(FileNotFoundException.class,
() -> dfs.listLocatedStatus(new Path("/dir1/dir2")));
}
@Test
public void testSimpleReadEmptyDirOrFile() throws IOException {
// read empty dir