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https://issues.apache.org/jira/browse/HBASE-21828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758933#comment-16758933
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Duo Zhang commented on HBASE-21828:
-----------------------------------
Oh, what is the jdk version?
And could you please try this code snippet?
{code}
CompletableFuture<Integer> future = new CompletableFuture<>();
CompletableFuture<Integer> f1 = future.thenApply(Function.identity());
CompletableFuture<Integer> f2 = future.thenApply(Function.identity());
future.whenComplete((r, e) -> System.out.println("error for future " +
e.toString()));
f1.whenComplete((r, e) -> System.out.println("error for f1 " +
e.toString()));
f2.whenComplete((r, e) -> System.out.println("error for f2 " +
e.toString()));
future.completeExceptionally(new Exception("error!"));
{code}
For me, the output is
{noformat}
error for future java.lang.Exception: error!
error for f2 java.util.concurrent.CompletionException: java.lang.Exception:
error!
error for f1 java.util.concurrent.CompletionException: java.lang.Exception:
error!
{noformat}
You can see that the whenComplete callback registered on f1 and f2 will get a
CompletionException instead of the original Exception. My jdk version is oracle
jdk 1.8.0_181.
> 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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