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https://issues.apache.org/jira/browse/FLINK-13702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16962936#comment-16962936
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Dawid Wysakowicz commented on FLINK-13702:
------------------------------------------

What do you mean by ??invoke BinaryString.ensureMaterialized to make 
BinaryString read thread safe??.

Actually I also spotted [FLINK-13740]. After a bit longer analysis I think 
adding a {{copy}} in the test is not enough. I am afraid the 
{{BinaryLazyFormat}} is really flawed in the current state and effectively 
unusable. I think we should aim to fix it in 1.10.

> BaseMapSerializerTest.testDuplicate fails on Travis
> ---------------------------------------------------
>
>                 Key: FLINK-13702
>                 URL: https://issues.apache.org/jira/browse/FLINK-13702
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.10.0
>            Reporter: Till Rohrmann
>            Assignee: Dawid Wysakowicz
>            Priority: Critical
>              Labels: test-stability
>
> The {{BaseMapSerializerTest.testDuplicate}} fails on Travis with an 
> {{java.lang.IndexOutOfBoundsException}}.
> https://api.travis-ci.org/v3/job/570973199/log.txt



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