Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-03-08 Thread via GitHub


steveloughran merged PR #6465:
URL: https://github.com/apache/hadoop/pull/6465


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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-02-07 Thread via GitHub


steveloughran commented on PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#issuecomment-1932193942

   Ready to go in; reviews welcome.
   
   @ahmarsuhail @mukund-thakur @HarshitGupta11 


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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-21 Thread via GitHub


hadoop-yetus commented on PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#issuecomment-1902752372

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-21 Thread via GitHub


steveloughran commented on PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#issuecomment-1902727835

   applied my own review comments; tested against s3 express in usw2 with and 
without -prefetch


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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-19 Thread via GitHub


steveloughran commented on code in PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#discussion_r1459580119


##
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:
##
@@ -161,7 +171,11 @@ public void testOpenFileWithStatusOfOtherFS() throws 
Throwable {
   @Test
   public void testStreamIsNotChecksummed() throws Throwable {
 describe("Verify that an opened stream is not checksummed");
+
+// if prefetching is enabled, skip this test
+assumeNoPrefetching();
 S3AFileSystem fs = getFileSystem();
+

Review Comment:
   cut just to reduce diff



##
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/performance/ITestS3AOpenCost.java:
##
@@ -420,31 +443,56 @@ public void testVectorReadPastEOF() throws Throwable {
 TimeUnit.SECONDS,
 range.getData());
 assertS3StreamClosed(in);
-return "vector read past EOF";
+return "vector read past EOF with " + in;
   }
 },
-with(Statistic.ACTION_HTTP_GET_REQUEST, 1));
+always(),
+probe(!prefetching, Statistic.ACTION_HTTP_GET_REQUEST, 1));
+  }
+
+  /**
+   * Probe the FS for supporting prefetching.
+   * @return true if the fs has prefetching enabled.
+   */
+  private boolean prefetching()  {
+return getFileSystem().getConf().getBoolean(
+PREFETCH_ENABLED_KEY, PREFETCH_ENABLED_DEFAULT);
+  }
+
+  /**
+   * Skip the test if prefetching is enabled.
+   */
+  private void assumeNoPrefetching(){
+if (prefetching) {
+  skip("Prefetching is enabled");
+}
   }
 
   /**
* Assert that the inner S3 Stream is closed.
* @param in input stream
*/
   private static void assertS3StreamClosed(final FSDataInputStream in) {
-S3AInputStream s3ain = (S3AInputStream) in.getWrappedStream();
-Assertions.assertThat(s3ain.isObjectStreamOpen())
-.describedAs("stream is open")
-.isFalse();
+final InputStream wrapped = in.getWrappedStream();
+if (wrapped instanceof S3AInputStream) {
+  S3AInputStream s3ain = (S3AInputStream) wrapped;
+  Assertions.assertThat(s3ain.isObjectStreamOpen())
+  .describedAs("stream is open")

Review Comment:
   should put the string value of the stream in the exception text here; same 
below



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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-18 Thread via GitHub


hadoop-yetus commented on PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#issuecomment-1898531150

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-18 Thread via GitHub


hadoop-yetus commented on PR #6465:
URL: https://github.com/apache/hadoop/pull/6465#issuecomment-1898520977

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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Re: [PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-17 Thread via GitHub


hadoop-yetus commented on PR #6460:
URL: https://github.com/apache/hadoop/pull/6460#issuecomment-1896682323

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
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[PR] HADOOP-19043. S3A: Regression: ITestS3AOpenCost fails on prefetch test runs [hadoop]

2024-01-17 Thread via GitHub


steveloughran opened a new pull request, #6460:
URL: https://github.com/apache/hadoop/pull/6460

   
   
   This is actually trickier than it seems as we will need to go deep into the 
implementation of caching.
   
   Specifically: the prefetcher knows the file length and if you open a file 
shorter than that, but less than one block, the read is considered a failure 
and the whole block is skipped, so read() of the nominally in-range data 
returns -1.
   
   This fix has to be considered a PoC and should be combined with the other 
big PR for prefetching, #5832 as that is where changes should go.
   
   Here is just test tuning and some differentiation of channel problems from 
other EOFs.
   
   ### How was this patch tested?
   
   ```
   mvn verify -Dtest=none -Dit.test=ITestS3AOpenCost -Dprefetch
   ```
   
   
   ### For code changes:
   
   - [X] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the 
endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, 
`NOTICE-binary` files?
   
   


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