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Posted to commits@hudi.apache.org by GitBox <gi...@apache.org> on 2022/10/22 01:58:21 UTC

[GitHub] [hudi] alexeykudinkin opened a new pull request, #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

alexeykudinkin opened a new pull request, #7024:
URL: https://github.com/apache/hudi/pull/7024

   ### Change Logs
   
   _Describe context and summary for this change. Highlight if any code was copied._
   
   ### Impact
   
   Currently `Utf8` is being serialized as generic object by implicitly generated serializer (based on FieldSerializer), essentially serializing all of its fields. 
   
   This is inefficient and causes some friction in some exotic setups when (as described in the attached issue) version of Avro used on the Write Path might be diverging from the one used on the Read Path (this occurs, b/c since b/w 1.8.2 and 1.10.2, `Utf8` acquired one more field and therefore its payload couldn't be deserialized by implicitly gen'd serializer).
   
   ### Risk level (write none, low medium or high below)
   
   Low
   
   ### Documentation Update
   
   N/A
   
   ### Contributor's checklist
   
   - [ ] Read through [contributor's guide](https://hudi.apache.org/contribute/how-to-contribute)
   - [ ] Change Logs and Impact were stated clearly
   - [ ] Adequate tests were added if applicable
   - [ ] CI passed
   


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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1287588524

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   ## CI report:
   
   * 14a07bcbbd49b394fd755679c2aac5c89dd1de12 Azure: [PENDING](https://dev.azure.com/apache-hudi-ci-org/785b6ef4-2f42-4a89-8f0e-5f0d7039a0cc/_build/results?buildId=12446) 
   
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[GitHub] [hudi] Zouxxyy commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by "Zouxxyy (via GitHub)" <gi...@apache.org>.
Zouxxyy commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1635339384

   Tables with delete blocks written after this PR will not be readable by lower versions, such as 0.12.x. @alexeykudinkin


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[GitHub] [hudi] alexeykudinkin commented on a diff in pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
alexeykudinkin commented on code in PR #7024:
URL: https://github.com/apache/hudi/pull/7024#discussion_r1003865640


##########
hudi-common/src/test/java/org/apache/hudi/common/util/TestSerializationUtils.java:
##########
@@ -52,12 +58,33 @@ public void testSerDeser() throws IOException {
     verifyObject(new LinkedList<>(Arrays.asList(2, 3, 5)));
   }
 
+  @Test
+  public void testAvroUtf8SerDe() throws IOException {
+    byte[] firstBytes = SerializationUtils.serialize(new Utf8("test"));
+    // 4 byte string + 3 bytes length (Kryo uses variable-length encoding)
+    assertEquals(firstBytes.length, 7);
+  }
+
+  @Test
+  public void testClassFullyQualifiedNameSerialization() throws IOException {
+    DeleteRecord deleteRecord = DeleteRecord.create(new HoodieKey("key", "partition"));
+    HoodieDeleteBlock deleteBlock = new HoodieDeleteBlock(new DeleteRecord[]{deleteRecord}, Collections.emptyMap());
+
+    byte[] firstBytes = SerializationUtils.serialize(deleteBlock);
+    byte[] secondBytes = SerializationUtils.serialize(deleteBlock);
+
+    assertNotSame(firstBytes, secondBytes);
+    // NOTE: Here we assert that Kryo doesn't optimize out the fully-qualified class-name
+    //       and always writes it out
+    assertEquals(ByteBuffer.wrap(firstBytes), ByteBuffer.wrap(secondBytes));

Review Comment:
   It wasn't. This is a litmus test to make sure this doesn't happen



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[GitHub] [hudi] nsivabalan commented on a diff in pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
nsivabalan commented on code in PR #7024:
URL: https://github.com/apache/hudi/pull/7024#discussion_r1003849983


##########
hudi-common/src/test/java/org/apache/hudi/common/util/TestSerializationUtils.java:
##########
@@ -52,12 +58,33 @@ public void testSerDeser() throws IOException {
     verifyObject(new LinkedList<>(Arrays.asList(2, 3, 5)));
   }
 
+  @Test
+  public void testAvroUtf8SerDe() throws IOException {
+    byte[] firstBytes = SerializationUtils.serialize(new Utf8("test"));
+    // 4 byte string + 3 bytes length (Kryo uses variable-length encoding)
+    assertEquals(firstBytes.length, 7);
+  }
+
+  @Test
+  public void testClassFullyQualifiedNameSerialization() throws IOException {
+    DeleteRecord deleteRecord = DeleteRecord.create(new HoodieKey("key", "partition"));
+    HoodieDeleteBlock deleteBlock = new HoodieDeleteBlock(new DeleteRecord[]{deleteRecord}, Collections.emptyMap());
+
+    byte[] firstBytes = SerializationUtils.serialize(deleteBlock);
+    byte[] secondBytes = SerializationUtils.serialize(deleteBlock);
+
+    assertNotSame(firstBytes, secondBytes);
+    // NOTE: Here we assert that Kryo doesn't optimize out the fully-qualified class-name
+    //       and always writes it out
+    assertEquals(ByteBuffer.wrap(firstBytes), ByteBuffer.wrap(secondBytes));

Review Comment:
   was this throwing exception before? 



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[GitHub] [hudi] alexeykudinkin commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
alexeykudinkin commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1289249654

   @hudi-bot run azure


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[GitHub] [hudi] xushiyan merged pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
xushiyan merged PR #7024:
URL: https://github.com/apache/hudi/pull/7024


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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1287644802

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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1289273021

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   ## CI report:
   
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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1291197750

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   ## CI report:
   
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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1289798352

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   ## CI report:
   
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[GitHub] [hudi] alexeykudinkin commented on a diff in pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
alexeykudinkin commented on code in PR #7024:
URL: https://github.com/apache/hudi/pull/7024#discussion_r1004704573


##########
hudi-common/src/test/java/org/apache/hudi/common/util/TestSerializationUtils.java:
##########
@@ -52,12 +58,33 @@ public void testSerDeser() throws IOException {
     verifyObject(new LinkedList<>(Arrays.asList(2, 3, 5)));
   }
 
+  @Test
+  public void testAvroUtf8SerDe() throws IOException {
+    byte[] firstBytes = SerializationUtils.serialize(new Utf8("test"));
+    // 4 byte string + 3 bytes length (Kryo uses variable-length encoding)
+    assertEquals(firstBytes.length, 7);

Review Comment:
   Ah, fixing this for existing tests, and fallen prey for this myself



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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1291201635

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[GitHub] [hudi] xushiyan commented on a diff in pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
xushiyan commented on code in PR #7024:
URL: https://github.com/apache/hudi/pull/7024#discussion_r1004574193


##########
hudi-common/src/test/java/org/apache/hudi/common/util/TestSerializationUtils.java:
##########
@@ -52,12 +58,33 @@ public void testSerDeser() throws IOException {
     verifyObject(new LinkedList<>(Arrays.asList(2, 3, 5)));
   }
 
+  @Test
+  public void testAvroUtf8SerDe() throws IOException {
+    byte[] firstBytes = SerializationUtils.serialize(new Utf8("test"));
+    // 4 byte string + 3 bytes length (Kryo uses variable-length encoding)
+    assertEquals(firstBytes.length, 7);

Review Comment:
   /nit expected value goes first



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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1291491681

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[GitHub] [hudi] hudi-bot commented on pull request #7024: [HUDI-4959] Fixing Avro's `Utf8` serialization in Kryo

Posted by GitBox <gi...@apache.org>.
hudi-bot commented on PR #7024:
URL: https://github.com/apache/hudi/pull/7024#issuecomment-1287583214

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   ## CI report:
   
   * 14a07bcbbd49b394fd755679c2aac5c89dd1de12 UNKNOWN
   
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