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https://issues.apache.org/jira/browse/FLINK-8802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398256#comment-16398256
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ASF GitHub Bot commented on FLINK-8802:
---------------------------------------
Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/5691#discussion_r174380744
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/heap/AbstractHeapMergingState.java
---
@@ -28,18 +28,19 @@
import java.util.Collection;
/**
- * Base class for {@link MergingState} ({@link
org.apache.flink.runtime.state.internal.InternalMergingState})
- * that is stored on the heap.
+ * Base class for {@link MergingState} ({@link InternalMergingState}) that
is stored on the heap.
*
- * @param <K> The type of the key.
- * @param <N> The type of the namespace.
- * @param <SV> The type of the values in the state.
- * @param <S> The type of State
- * @param <SD> The type of StateDescriptor for the State S
+ * @param <K> The type of the key.
+ * @param <N> The type of the namespace.
+ * @param <IN> The type of the input elements.
+ * @param <SV> The type of the values in the state.
+ * @param <OUT> The type of the output elements.
--- End diff --
indentation
> Concurrent serialization without duplicating serializers in state server.
> -------------------------------------------------------------------------
>
> Key: FLINK-8802
> URL: https://issues.apache.org/jira/browse/FLINK-8802
> Project: Flink
> Issue Type: Bug
> Components: Queryable State
> Affects Versions: 1.5.0
> Reporter: Kostas Kloudas
> Assignee: Kostas Kloudas
> Priority: Blocker
> Fix For: 1.5.0
>
>
> The `getSerializedValue()` may be called by multiple threads but serializers
> are not duplicated, which may lead to exceptions thrown when a serializer is
> stateful.
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