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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2021/10/26 15:13:33 UTC

[GitHub] [flink] akalash opened a new pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

akalash opened a new pull request #17573:
URL: https://github.com/apache/flink/pull/17573


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   ## What is the purpose of the change
   
   *This PR forbid splitting the first record into two buffers if it physically fits one*
   
   
   ## Brief change log
   
     - *Min buffer size is max between desirable buffer size and the first record size for both unicast and broadcast*
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
     - *Added new tests into ResultPartitionTest*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes / **no**)
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: (yes / **no**)
     - The serializers: (yes / **no** / don't know)
     - The runtime per-record code paths (performance sensitive): (yes / **no** / don't know)
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / **no** / don't know)
     - The S3 file system connector: (yes / **no** / don't know)
   
   ## Documentation
   
     - Does this pull request introduce a new feature? (yes / **no**)
     - If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)
   


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[GitHub] [flink] flinkbot commented on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] pnowojski merged pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
pnowojski merged pull request #17573:
URL: https://github.com/apache/flink/pull/17573


   


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] akalash commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
akalash commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r737626916



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
##########
@@ -346,7 +346,8 @@ void announceBufferSize(int newBufferSize) {
 
     @Override
     int getBuffersInUseCount() {
-        return subpartitionView.getNumberOfQueuedBuffers();
+        ResultSubpartitionView view = subpartitionView;
+        return view == null ? 0 : view.getNumberOfQueuedBuffers();

Review comment:
       It is exactly what I wanted to ask - does it make sense or not to create a separate ticket for this. 
   But the point about the backport is the answer to it. so I will create the new ticket and move these changes into it.




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[GitHub] [flink] pnowojski commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
pnowojski commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r738335950



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/BufferWritingResultPartition.java
##########
@@ -270,20 +270,24 @@ private BufferBuilder appendUnicastDataForNewRecord(
     }
 
     private void addToSubpartition(
-            BufferBuilder buffer, int targetSubpartition, int partialRecordLength)
+            BufferBuilder buffer,
+            int targetSubpartition,
+            int partialRecordLength,
+            int minAllowedBufferSize)
             throws IOException {
         int desirableBufferSize =
                 subpartitions[targetSubpartition].add(
                         buffer.createBufferConsumerFromBeginning(), partialRecordLength);
 
-        resizeBuffer(buffer, desirableBufferSize);
+        resizeBuffer(buffer, desirableBufferSize, minAllowedBufferSize);
     }
 
-    private void resizeBuffer(BufferBuilder buffer, int desirableBufferSize) {
+    private void resizeBuffer(
+            BufferBuilder buffer, int desirableBufferSize, int minAllowedBufferSize) {

Review comment:
       nit: rename `minAllowedBufferSize` -> `minDesirableBufferSize`? Or even better `remainingRecordSize`? 
   
   Almost for sure that's not min allowed size, as we are allowing for smaller buffer sizes, for example if recordSize > 32KB.




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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] pnowojski commented on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
pnowojski commented on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952927633


   (there are also some test failures)


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[GitHub] [flink] flinkbot commented on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952044174


   Thanks a lot for your contribution to the Apache Flink project. I'm the @flinkbot. I help the community
   to review your pull request. We will use this comment to track the progress of the review.
   
   
   ## Automated Checks
   Last check on commit 0c03f9744353ae2b4140d334bc00649d311ee142 (Tue Oct 26 15:16:30 UTC 2021)
   
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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] pnowojski commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
pnowojski commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r737460618



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/BufferWritingResultPartition.java
##########
@@ -327,12 +331,13 @@ private BufferBuilder appendBroadcastDataForRecordContinuation(
         // with a complete record.
         // !! The next two lines can not change order.
         final int partialRecordBytes = buffer.appendAndCommit(remainingRecordBytes);
-        createBroadcastBufferConsumers(buffer, partialRecordBytes);
+        createBroadcastBufferConsumers(buffer, partialRecordBytes, 0);

Review comment:
       ditto

##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/BufferWritingResultPartition.java
##########
@@ -298,7 +302,7 @@ private BufferBuilder appendUnicastDataForRecordContinuation(
         // with a complete record.
         // !! The next two lines can not change order.
         final int partialRecordBytes = buffer.appendAndCommit(remainingRecordBytes);
-        addToSubpartition(buffer, targetSubpartition, partialRecordBytes);
+        addToSubpartition(buffer, targetSubpartition, partialRecordBytes, 0);

Review comment:
       why not `addToSubpartition(buffer, targetSubpartition, partialRecordBytes, partialRecordBytes);`? (and if so add a test coverage)

##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
##########
@@ -346,7 +346,8 @@ void announceBufferSize(int newBufferSize) {
 
     @Override
     int getBuffersInUseCount() {
-        return subpartitionView.getNumberOfQueuedBuffers();
+        ResultSubpartitionView view = subpartitionView;
+        return view == null ? 0 : view.getNumberOfQueuedBuffers();

Review comment:
       1. is this change related to this ticket? How did you find this issue?
   2. it sounds like this might deserve an independent bug ticket and might has to be backported to 1.14.x.
   3. test coverage?




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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] akalash commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
akalash commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r737633413



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/consumer/LocalInputChannel.java
##########
@@ -346,7 +346,8 @@ void announceBufferSize(int newBufferSize) {
 
     @Override
     int getBuffersInUseCount() {
-        return subpartitionView.getNumberOfQueuedBuffers();
+        ResultSubpartitionView view = subpartitionView;
+        return view == null ? 0 : view.getNumberOfQueuedBuffers();

Review comment:
       https://issues.apache.org/jira/browse/FLINK-24671




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[GitHub] [flink] akalash commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
akalash commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r737622601



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/BufferWritingResultPartition.java
##########
@@ -327,12 +331,13 @@ private BufferBuilder appendBroadcastDataForRecordContinuation(
         // with a complete record.
         // !! The next two lines can not change order.
         final int partialRecordBytes = buffer.appendAndCommit(remainingRecordBytes);
-        createBroadcastBufferConsumers(buffer, partialRecordBytes);
+        createBroadcastBufferConsumers(buffer, partialRecordBytes, 0);

Review comment:
       ditto :)




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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] akalash commented on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
akalash commented on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-953098679


   I updated the commit in place. I just made changes in PartitionRequestQueueTest and replaced maxAllowedBUfferSize for partial record from 0 to partialRecordSize


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] akalash commented on a change in pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
akalash commented on a change in pull request #17573:
URL: https://github.com/apache/flink/pull/17573#discussion_r737621857



##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/io/network/partition/BufferWritingResultPartition.java
##########
@@ -298,7 +302,7 @@ private BufferBuilder appendUnicastDataForRecordContinuation(
         // with a complete record.
         // !! The next two lines can not change order.
         final int partialRecordBytes = buffer.appendAndCommit(remainingRecordBytes);
-        addToSubpartition(buffer, targetSubpartition, partialRecordBytes);
+        addToSubpartition(buffer, targetSubpartition, partialRecordBytes, 0);

Review comment:
       in this case, it doesn't matter because both of them will work the same since we anyway never split the partial record. But as I can see now, perhaps you are right and `partialRecordBytes` looks more intuitive here
   I have the test coverage for this.




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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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[GitHub] [flink] flinkbot edited a comment on pull request #17573: [FLINK-24190][runtime] Forbid to split the first record in the buffer if it physically fit it.

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #17573:
URL: https://github.com/apache/flink/pull/17573#issuecomment-952043255


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