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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=16398270#comment-16398270
] 

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_r174380673
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/state/heap/HeapAggregatingState.java
---
    @@ -30,18 +30,17 @@
     import java.io.IOException;
     
     /**
    - * Heap-backed partitioned {@link ReducingState} that is
    - * snapshotted into files.
    + * Heap-backed partitioned {@link ReducingState} that is snapshotted into files.
      *
    - * @param <K> The type of the key.
    - * @param <N> The type of the namespace.
    - * @param <IN> The type of the value added to the state.
    - * @param <ACC> The type of the value stored in the state (the accumulator type).
    - * @param <OUT> The type of the value returned from the state.
    + * @param <K>	The type of the key.
    + * @param <N>	The type of the namespace.
    + * @param <IN>	The type of the value added to the state.
    + * @param <ACC>	The type of the value stored in the state (the accumulator type).
    + * @param <OUT>	The type of the value returned from the state.
    --- 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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