jlowe commented on a change in pull request #1920: MAPREDUCE-7241.
FileInputFormat listStatus with less memory footprint
URL: https://github.com/apache/hadoop/pull/1920#discussion_r399693801
##########
File path:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/lib/input/TestFileInputFormat.java
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@@ -238,6 +238,44 @@ public void testListStatusErrorOnNonExistantDir() throws
IOException {
}
}
+ @Test
+ public void testShrinkStatus() throws IOException {
+ Configuration conf = getConfiguration();
+ MockFileSystem mockFs =
+ (MockFileSystem) new Path("test:///").getFileSystem(conf);
+ Path dir1 = new Path("test:/a1");
+ RemoteIterator<LocatedFileStatus> statuses =
mockFs.listLocatedStatus(dir1);
Review comment:
This test doesn't test what we care about in this change. `MockFileSystem`
doesn't return a derived class of `BlockLocation` so nothing shrinks. This
test passes if `shrinkStatus` simply returned the original status, showing it
really isn't a useful test for verifying we don't regress and start caching
large location statuses again.
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