ayushtkn commented on a change in pull request #2305:
URL: https://github.com/apache/hadoop/pull/2305#discussion_r489137266
##########
File path:
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestViewDistributedFileSystemWithMountLinks.java
##########
@@ -61,4 +64,55 @@ public void testCreateOnRoot() throws Exception {
public void testMountLinkWithNonExistentLink() throws Exception {
testMountLinkWithNonExistentLink(false);
}
+
+ @Test
+ public void testRenameOnInternalDirWithFallback() throws Exception {
+ Configuration conf = getConf();
+ URI defaultFSURI =
+ URI.create(conf.get(CommonConfigurationKeys.FS_DEFAULT_NAME_KEY));
+ final Path hdfsTargetPath1 = new Path(defaultFSURI + "/HDFSUser");
+ final Path hdfsTargetPath2 = new Path(defaultFSURI + "/NewHDFSUser/next");
+ ViewFsTestSetup.addMountLinksToConf(defaultFSURI.getAuthority(),
+ new String[] {"/HDFSUser", "/NewHDFSUser/next"},
+ new String[] {hdfsTargetPath1.toUri().toString(),
+ hdfsTargetPath2.toUri().toString()}, conf);
+ //Making sure parent dir structure as mount points available in fallback.
+ try (DistributedFileSystem dfs = new DistributedFileSystem()) {
+ dfs.initialize(defaultFSURI, conf);
+ dfs.mkdirs(hdfsTargetPath1);
+ dfs.mkdirs(hdfsTargetPath2);
+ }
+
+ try (FileSystem fs = FileSystem.get(conf)) {
+ Path src = new Path("/newFileOnRoot");
+ Path dst = new Path("/newFileOnRoot1");
+ fs.create(src).close();
+ verifyRename(fs, src, dst);
+
+ src = new Path("/newFileOnRoot1");
+ dst = new Path("/NewHDFSUser/newFileOnRoot");
+ fs.mkdirs(dst.getParent());
+ verifyRename(fs, src, dst);
+
+ src = new Path("/NewHDFSUser/newFileOnRoot");
+ dst = new Path("/NewHDFSUser/newFileOnRoot1");
+ verifyRename(fs, src, dst);
+
+ src = new Path("/NewHDFSUser/newFileOnRoot1");
+ dst = new Path("/newFileOnRoot");
+ verifyRename(fs, src, dst);
+
+ src = new Path("/HDFSUser/newFileOnRoot1");
+ dst = new Path("/HDFSUser/newFileOnRoot");
+ fs.create(src).close();
+ verifyRename(fs, src, dst);
+ }
+ }
+
+ private void verifyRename(FileSystem fs, Path src, Path dst)
+ throws IOException {
+ fs.rename(src, dst);
+ Assert.assertFalse(fs.exists(src));
+ Assert.assertTrue(fs.exists(dst));
+ }
Review comment:
I tried a couple of cases of rename. Can you give a check once.
``` Test
public void testRenameOnInternalDirWithFallback() throws Exception {
Configuration conf = getConf();
URI defaultFSURI =
URI.create(conf.get(CommonConfigurationKeys.FS_DEFAULT_NAME_KEY));
final Path hdfsTargetPath1 = new Path(defaultFSURI + "/HDFSUser");
final Path hdfsTargetPath2 = new Path(defaultFSURI + "/dstNewHDFSUser"
+ "/next");
ViewFsTestSetup.addMountLinksToConf(defaultFSURI.getAuthority(),
new String[] {"/HDFSUser", "/NewHDFSUser/next/next1"},
new String[] {hdfsTargetPath1.toUri().toString(),
hdfsTargetPath2.toUri().toString()}, conf);
//Making sure parent dir structure as mount points available in fallback.
try (DistributedFileSystem dfs = new DistributedFileSystem()) {
dfs.initialize(defaultFSURI, conf);
dfs.mkdirs(hdfsTargetPath1);
dfs.mkdirs(hdfsTargetPath2);
}
try (FileSystem fs = FileSystem.get(conf)) {
// Case : 1
Path src = new Path("/newFileOnRoot");
Path dst = new Path("/NewHDFSUser/next");
fs.create(src).close();
verifyRename(fs, src, dst); // Fails. Shouldn't it move to
// /NewHDFSUser/next/newFileOnRoot ?
src = new Path("/newFileOnRoot");
dst = new Path("/NewHDFSUser/next/file");
verifyRename(fs, src, dst); // Fails. Guess since the parent structure
// isn't there at fallback?```
I couldn't check more, but
CASE 1: if the destination is a directory, shouldn't it move src inside it?
CASE:2 Seems due to parent structure isn't there in fallback?
I didn't try with ViewFs, maybe something similar there as well
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