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https://issues.apache.org/jira/browse/HBASE-22172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16812860#comment-16812860
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Sakthi commented on HBASE-22172:
--------------------------------

I tried hbase shell using --illegal-access=warn to list out all the warnings. 
It listed around 250 warnings. I am not sure if there is any single flag that 
can be passed to suppress all such warnings. We have to acknowledge the fact 
that we know we are using these methods, by adding -add-opens flag for each of 
them. I am attaching a sample patch.

> Suppress Java 11 reflective access warnings
> -------------------------------------------
>
>                 Key: HBASE-22172
>                 URL: https://issues.apache.org/jira/browse/HBASE-22172
>             Project: HBase
>          Issue Type: Task
>            Reporter: Sakthi
>            Assignee: Sakthi
>            Priority: Major
>              Labels: jdk11
>
> While running a Java 8 compiled hbase on Java 11 system, I found the 
> following warnings being thrown. I think we can add the "--add-opens" flag to 
> HBASE_OPTS (if the jdk version is 11) to suppress this warning.
> {code:java}
> WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by 
> org.apache.hadoop.hbase.util.UnsafeAvailChecker 
> (file:/Users/jatsakthi/test/HBASE_TEST_AREA/hbase-3.0.0-SNAPSHOT/lib/hbase-common-3.0.0-SNAPSHOT.jar)
>  to method java.nio.Bits.unaligned()
> WARNING: Please consider reporting this to the maintainers of 
> org.apache.hadoop.hbase.util.UnsafeAvailChecker
> WARNING: Use --illegal-access=warn to enable warnings of further illegal 
> reflective access operations
> WARNING: All illegal access operations will be denied in a future release
> {code}



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