mukund-thakur commented on a change in pull request #1404: HDFS-13660 Copy file
till the source file length during distcp
URL: https://github.com/apache/hadoop/pull/1404#discussion_r323290794
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File path:
hadoop-tools/hadoop-distcp/src/test/java/org/apache/hadoop/tools/mapred/TestCopyMapper.java
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@@ -444,6 +449,54 @@ private void testCopyingExistingFiles(FileSystem fs,
CopyMapper copyMapper,
}
}
+ @Test
+ public void testCopyWhileAppend() throws Exception {
+ deleteState();
+ mkdirs(SOURCE_PATH + "/1");
+ touchFile(SOURCE_PATH + "/1/3");
+ CopyMapper copyMapper = new CopyMapper();
+ StubContext stubContext = new StubContext(getConfiguration(), null, 0);
+ Mapper<Text, CopyListingFileStatus, Text, Text>.Context context =
+ stubContext.getContext();
+ copyMapper.setup(context);
+ final Path path = new Path(SOURCE_PATH + "/1/3");
+ int manyBytes = 100000000;
+ appendFile(path, manyBytes);
+ ScheduledExecutorService scheduledExecutorService =
Executors.newSingleThreadScheduledExecutor();
+ Runnable task = new Runnable() {
+ public void run() {
+ try {
+ int maxAppendAttempts = 20;
+ int appendCount = 0;
+ while (appendCount < maxAppendAttempts) {
+ appendFile(path, 1000);
+ Thread.sleep(200);
+ appendCount++;
+ }
+ } catch (IOException | InterruptedException e) {
+ e.printStackTrace();
+ }
+ }
+ };
+ scheduledExecutorService.schedule(task, 10, TimeUnit.MILLISECONDS);
+ boolean isFileMismatchErrorPresent = false;
+ try {
Review comment:
I may be wrong but as per my understanding of intercept() method it should
be used when we are expecting some Exception but in our scenario what we want
is copy should run successfully without any exception. If there is any
exception we should fail the test.
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