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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2022/01/21 01:24:13 UTC

[GitHub] [flink] KarmaGYZ opened a new pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

KarmaGYZ opened a new pull request #18434:
URL: https://github.com/apache/flink/pull/18434


   …nk side.
   
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[GitHub] [flink] dawidwys commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
dawidwys commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1021948494


   Sorry for nitpicking. Could we please pay more attention to PRs description? We should serve as an example if we require contributors to fill it in.


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1021955008


   @dawidwys I'll fill that.


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ removed a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ removed a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1033442692


   @flinkbot run azure


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[GitHub] [flink] flinkbot commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018079234


   Thanks a lot for your contribution to the Apache Flink project. I'm the @flinkbot. I help the community
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   ## Automated Checks
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[GitHub] [flink] dawidwys commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
dawidwys commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1021956202


   Thanks @KarmaGYZ ! I know from personal experience it might be daunting at times :sweat_smile: 


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1022775069


   @zentol This PR is an improvement of the job execution for Flink OLAP. In our internal benchmark, the serialization of the `RemoteRpcInvocation` at the Flink side will increase the end-to-end latency of a 1000*1000 `WordCount` for about 100ms.


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1033503027


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[GitHub] [flink] zentol commented on a change in pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
zentol commented on a change in pull request #18434:
URL: https://github.com/apache/flink/pull/18434#discussion_r794364073



##########
File path: flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/rpc/akka/MessageSerializationTest.java
##########
@@ -139,32 +139,6 @@ public void testSerializableRemoteMessageTransfer() throws Exception {
         assertThat(linkedBlockingQueue.take(), Is.<Object>is(expected));
     }
 
-    /**
-     * Tests that a message which exceeds the maximum frame size is detected and a corresponding
-     * exception is thrown.
-     */
-    @Test(expected = IOException.class)
-    public void testMaximumFramesizeRemoteMessageTransfer() throws Exception {

Review comment:
       There should still be a test that checks the behavior if this error case occurs. E.g., that the response future is completed exceptionally.




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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1034329303


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
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URL: https://github.com/apache/flink/pull/18434#issuecomment-1033442692


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ closed pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ closed pull request #18434:
URL: https://github.com/apache/flink/pull/18434


   


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
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[GitHub] [flink] zentol commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
zentol commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1024061854


   > Without this serialization
   
   But things are serialized _anyway_ because of Akka; it just happens later. So where is this performance gain coming from?


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1034493244


   @flinkbot run azure


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1022775069


   @zentol This PR is an improvement of the job execution for Flink OLAP. In the OLAP scenario, most jobs can be finished within 1s(in our internal benchmark, a 1000*1000 WordCount will take nearly 700ms). The serialization of the `RemoteRpcInvocation` at the Flink side will place a heavy burden on JobManager. Without this serialization, We will gain a 20% increase in throughput.


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] KarmaGYZ commented on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1030999706


   @zentol Now, the `RemoteRpcInvocation` are serialized twice, first in Flink and second in Akka. This PR removes the first serialization in Flink.


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] zentol commented on a change in pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
zentol commented on a change in pull request #18434:
URL: https://github.com/apache/flink/pull/18434#discussion_r792578144



##########
File path: flink-rpc/flink-rpc-core/src/main/java/org/apache/flink/runtime/rpc/messages/RemoteRpcInvocation.java
##########
@@ -35,13 +34,12 @@
  * contains a non-serializable object, then an {@link IOException} is thrown.
  */
 public class RemoteRpcInvocation implements RpcInvocation, Serializable {

Review comment:
       javadocs are outdated

##########
File path: flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/rpc/akka/MessageSerializationTest.java
##########
@@ -139,32 +139,6 @@ public void testSerializableRemoteMessageTransfer() throws Exception {
         assertThat(linkedBlockingQueue.take(), Is.<Object>is(expected));
     }
 
-    /**
-     * Tests that a message which exceeds the maximum frame size is detected and a corresponding
-     * exception is thrown.
-     */
-    @Test(expected = IOException.class)
-    public void testMaximumFramesizeRemoteMessageTransfer() throws Exception {

Review comment:
       Which tests now covers the case of oversized messages?




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[GitHub] [flink] KarmaGYZ commented on a change in pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
KarmaGYZ commented on a change in pull request #18434:
URL: https://github.com/apache/flink/pull/18434#discussion_r793223927



##########
File path: flink-rpc/flink-rpc-akka/src/test/java/org/apache/flink/runtime/rpc/akka/MessageSerializationTest.java
##########
@@ -139,32 +139,6 @@ public void testSerializableRemoteMessageTransfer() throws Exception {
         assertThat(linkedBlockingQueue.take(), Is.<Object>is(expected));
     }
 
-    /**
-     * Tests that a message which exceeds the maximum frame size is detected and a corresponding
-     * exception is thrown.
-     */
-    @Test(expected = IOException.class)
-    public void testMaximumFramesizeRemoteMessageTransfer() throws Exception {

Review comment:
       Before this PR, Flink will eagerly check the oversized messages. Now, when there is an oversized message, the job will fail with Akka's `AskTimeoutException` and there will be an error log from Akka which indicates the exact size of that message. As Flink does not take the responsibility to detect oversized messages, I think we don't need such tests anymore.




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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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[GitHub] [flink] flinkbot edited a comment on pull request #18434: [FLINK-25742][akka] Remove the serialization of rpc invocation at Fli…

Posted by GitBox <gi...@apache.org>.
flinkbot edited a comment on pull request #18434:
URL: https://github.com/apache/flink/pull/18434#issuecomment-1018078894


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