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https://issues.apache.org/jira/browse/HDFS-16911?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17704352#comment-17704352
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ASF GitHub Bot commented on HDFS-16911:
---------------------------------------
steveloughran commented on code in PR #5364:
URL: https://github.com/apache/hadoop/pull/5364#discussion_r1146801468
##########
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestDistCpSync.java:
##########
@@ -1303,12 +1303,13 @@ public void testSyncSnapshotDiffWithDummyFileSystem()
throws Exception {
FileSystem dummyFs = FileSystem.get(URI.create("dummy:///"), conf);
Assert.assertTrue(dummyFs instanceof DummyFs);
new DistCp(conf, OptionsParser.parse(args)).execute();
+ } catch (UnsupportedOperationException e) {
+ Assert.fail("Dummy FS supports snapshots," +
Review Comment:
if you just rethrow e here, then the caller gets a full stack.
##########
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/TestDistCpSync.java:
##########
@@ -1276,4 +1283,64 @@ private void snapshotDiffWithPaths(Path sourceFSPath,
verifyCopyByFs(sourceFS, targetFS, sourceFS.getFileStatus(sourceFSPath),
targetFS.getFileStatus(targetFSPath), false);
}
+
+ @Test
+ public void testSyncSnapshotDiffWithLocalFileSystem() throws Exception {
+ String[] args = new String[]{"-update", "-diff", "s1", "s2",
+ "file:///source", "file:///target"};
+ LambdaTestUtils.intercept(
+ UnsupportedOperationException.class,
+ "The source file system file does not support snapshot",
+ () -> new DistCp(conf, OptionsParser.parse(args)).execute());
+ }
+
+ @Test
+ public void testSyncSnapshotDiffWithDummyFileSystem() throws Exception {
+ String[] args =
+ new String[] { "-update", "-diff", "s1", "s2", "dummy:///source",
+ "dummy:///target" };
+ try {
+ FileSystem dummyFs = FileSystem.get(URI.create("dummy:///"), conf);
+ Assert.assertTrue(dummyFs instanceof DummyFs);
Review Comment:
not very informative. I'd prefer an assertJ assertion that the class is an
instance of,
```
assertThat(dummyfs).isInstanceOf()...
```
> Distcp with snapshot diff to support Ozone filesystem.
> ------------------------------------------------------
>
> Key: HDFS-16911
> URL: https://issues.apache.org/jira/browse/HDFS-16911
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: distcp
> Reporter: Sadanand Shenoy
> Priority: Major
> Labels: pull-request-available
>
> Currently in DistcpSync i.e the step which applies the diff b/w 2 provided
> snapshots as arguments to the distcp job with -diff option, only
> DistributedFilesystem and WebHDFS filesytems are supported.
>
> {code:java}
> // currently we require both the source and the target file system are
> // DistributedFileSystem or (S)WebHdfsFileSystem.
> if (!(srcFs instanceof DistributedFileSystem
> || srcFs instanceof WebHdfsFileSystem)) {
> throw new IllegalArgumentException("Unsupported source file system: "
> + srcFs.getScheme() + "://. " +
> "Supported file systems: hdfs://, webhdfs:// and swebhdfs://.");
> }
> if (!(tgtFs instanceof DistributedFileSystem
> || tgtFs instanceof WebHdfsFileSystem)) {
> throw new IllegalArgumentException("Unsupported target file system: "
> + tgtFs.getScheme() + "://. " +
> "Supported file systems: hdfs://, webhdfs:// and swebhdfs://.");
> }{code}
> As Ozone now supports snapshot feature after HDDS-6517, add support to use
> distcp with ozone snapshots.
>
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