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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 13:15:11 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16247480#comment-16247480
] 

ASF GitHub Bot commented on FLINK-7974:
---------------------------------------

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

    https://github.com/apache/flink/pull/4993#discussion_r150230620
  
    --- Diff: flink-queryable-state/flink-queryable-state-client-java/src/main/java/org/apache/flink/queryablestate/network/Client.java
---
    @@ -166,27 +168,39 @@ public String getClientName() {
     	 *
     	 * <p>After a call to this method, all returned futures will be failed.
     	 */
    -	public void shutdown() {
    +	public CompletableFuture<Boolean> shutdown() {
    --- End diff --
    
    This method when being called twice will give you a wrong result. The second call will
immediately return you a completed future.


> 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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