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https://issues.apache.org/jira/browse/HBASE-21828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758925#comment-16758925
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Wellington Chevreuil commented on HBASE-21828:
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I read the javadoc description for CompletableFuture.whenComplete(), and my
interpretations is that it should return the actual error faced during
execution. So, I then ran the added test with the original AsyncRegionLocator
code (that uses whenComplete() method), and it still passed. Debugging the
test, I could see exception set for errorHolder is a TableNotFoundException. On
the umbrella jira, I can see you mentioned some problems with
CompletionException on HBASE-21779, was that due nested
CompletableFuture.whenComplete calls?
> Make sure we do not return CompletionException when locating region
> -------------------------------------------------------------------
>
> Key: HBASE-21828
> URL: https://issues.apache.org/jira/browse/HBASE-21828
> Project: HBase
> Issue Type: Sub-task
> Components: asyncclient, Client
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0, 2.2.0, 2.1.3, 2.0.5, 2.3.0
>
> Attachments: HBASE-21828.patch
>
>
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