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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7974) AbstractServerBase#shutdown does not wait for shutdown completion
Date Fri, 10 Nov 2017 13:15:10 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16247477#comment-16247477

ASF GitHub Bot commented on FLINK-7974:

Github user tillrohrmann commented on a diff in the pull request:

    --- Diff: flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/network/Client.java
    @@ -419,20 +440,27 @@ void close() {
     		 * @param cause The cause to close the channel with.
     		 * @return Channel close future
    -		private boolean close(Throwable cause) {
    +		private CompletableFuture<Boolean> close(Throwable cause) {
    --- End diff --
    I think this method can give you wrong results when being called twice. The second call
will give you a completed future even though the first call could still be running.

> AbstractServerBase#shutdown does not wait for shutdown completion
> -----------------------------------------------------------------
>                 Key: FLINK-7974
>                 URL: https://issues.apache.org/jira/browse/FLINK-7974
>             Project: Flink
>          Issue Type: Bug
>          Components: Queryable State
>    Affects Versions: 1.4.0
>            Reporter: Till Rohrmann
>            Assignee: Kostas Kloudas
>            Priority: Critical
> The {{AbstractServerBase}} does not wait for the completion of its shutdown when calling
{{AbstractServerBase#shutdown}}. This is problematic since it leads to resource leaks and
instable tests such as the {{AbstractServerTest}}. I propose to let the {{AbstractServerBase#shutdown}}
return a termination future which is completed upon shutdown completion.

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