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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-8802) Concurrent serialization without duplicating serializers in state server.
Date Wed, 14 Mar 2018 08:47:02 GMT

    [ https://issues.apache.org/jira/browse/FLINK-8802?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16398263#comment-16398263
] 

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_r174380400
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/state/internal/InternalAppendingState.java
---
    @@ -24,9 +24,11 @@
      * The peer to the {@link AppendingState} in the internal state type hierarchy.
      * 
      * <p>See {@link InternalKvState} for a description of the internal state hierarchy.
    - * 
    - * @param <N>   The type of the namespace
    - * @param <IN>  The type of elements added to the state
    - * @param <OUT> The type of the 
    + *
    + * @param <K>	The type of key the state is associated to
    + * @param <N>	The type of the namespace
    + * @param <IN>	The type of elements added to the state
    + * @param <SV>	The type of elements in the state
    + * @param <OUT>	The type of the resulting element in the state
    --- End diff --
    
    indentation is weird


> 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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