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Posted to user@flink.apache.org by Антон <an...@yandex.ru> on 2022/02/11 06:44:46 UTC

Illegal reflective access by org.apache.flink.api.java.ClosureCleaner

Hello,

what could be the reason for warning like this:

WARNING: An illegal reflective access operation has occurred

WARNING: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner
(file:/var/flink/flink-1.13.2/lib/flink-dist_2.12-1.13.2.jar) to field
java.lang.String.value

WARNING: Please consider reporting this to the maintainers of
org.apache.flink.api.java.ClosureCleaner

?

Re: Illegal reflective access by org.apache.flink.api.java.ClosureCleaner

Posted by David Anderson <da...@apache.org>.

You are probably running with Java 11 (with Java 8 these messages aren't
produced). The Flink docs [1] say

    These warnings are considered harmless and will be addressed in future
Flink releases.

[1]
https://nightlies.apache.org/flink/flink-docs-release-1.14/release-notes/flink-1.10/#java-11-support

David

On Fri, Feb 11, 2022 at 7:44 AM Антон <an...@yandex.ru> wrote:

> Hello,
>
> what could be the reason for warning like this:
>
> WARNING: An illegal reflective access operation has occurred
>
> WARNING: Illegal reflective access by
> org.apache.flink.api.java.ClosureCleaner
> (file:/var/flink/flink-1.13.2/lib/flink-dist_2.12-1.13.2.jar) to field
> java.lang.String.value
>
> WARNING: Please consider reporting this to the maintainers of
> org.apache.flink.api.java.ClosureCleaner
>
> ?
>