flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-10827) Add test for duplicate() to SerializerTestBase
Date Fri, 09 Nov 2018 13:18:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-10827?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16681415#comment-16681415
] 

ASF GitHub Bot commented on FLINK-10827:
----------------------------------------

StefanRRichter commented on a change in pull request #7061: [FLINK-10827][tests] Add test
for duplicate() to SerializerTestBase
URL: https://github.com/apache/flink/pull/7061#discussion_r232249327
 
 

 ##########
 File path: flink-core/src/main/java/org/apache/flink/api/java/typeutils/runtime/PojoSerializer.java
 ##########
 @@ -181,11 +181,13 @@ public boolean isImmutableType() {
 			}
 		}
 
-		if (stateful) {
-			return new PojoSerializer<T>(clazz, duplicateFieldSerializers, fields, executionConfig);
-		} else {
-			return this;
+		if (!stateful) {
+			// as a small memory optimization, we can share the same object between instances
+			duplicateFieldSerializers = fieldSerializers;
 		}
+
+		// we must create a new instance, otherwise the subclassSerializerCache can create concurrency
problems
 
 Review comment:
   The point is that the Kryo serializer is not coming at all from the `fieldSerializers`
that we duplicate. It comes from `subclassSerializerCache` and nothing is duplicated from
there, which it also should not.

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


> Add test for duplicate() to SerializerTestBase
> ----------------------------------------------
>
>                 Key: FLINK-10827
>                 URL: https://issues.apache.org/jira/browse/FLINK-10827
>             Project: Flink
>          Issue Type: Test
>          Components: Tests
>            Reporter: Stefan Richter
>            Assignee: Stefan Richter
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.7.0
>
>
> In the past, we had many bugs from type serializers that have not properly implemented
the {{duplicate()}} method in a proper way. A very common error is to forget about creating
a deep copy of some fields that can lead to concurrency problems in the backend.
> We should add a test case for that tests duplicated serializer from different threads
to expose concurrency problems.



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

Mime
View raw message