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https://issues.apache.org/jira/browse/FLINK-3866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15420263#comment-15420263
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ASF GitHub Bot commented on FLINK-3866:
---------------------------------------
Github user mushketyk commented on the issue:
https://github.com/apache/flink/pull/2289
Hi @rmetzger, Thank you for helping with this!
> StringArraySerializer claims type is immutable; shouldn't
> ---------------------------------------------------------
>
> Key: FLINK-3866
> URL: https://issues.apache.org/jira/browse/FLINK-3866
> Project: Flink
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.0.3
> Reporter: Tatu Saloranta
> Assignee: Ivan Mushketyk
> Priority: Minor
>
> Looking at default `TypeSerializer` instances I noticed what looks like a
> minor flaw, unless I am missing something.
> Whereas all other array serializers indicate that type is not immutable
> (since in Java, arrays are not immutable), `StringArraySerializer` has:
> ```
> @Override
> public boolean isImmutableType() {
> return true;
> }
> ```
> and I think it should instead return `false`. I could create a PR, but seems
> like a small enough thing that issue report makes more sense.
> I tried looking for deps to see if there's a test for this, but couldn't find
> one; otherwise could submit a test fix.
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