[infinispan-issues] [JBoss JIRA] (ISPN-8729) Use async operations in Hot Rod server

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-8729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13525915#comment-13525915 ] 

Radim Vansa commented on ISPN-8729:
-----------------------------------

It should not block by design, be it used from server or from application. Such behaviour would be a bug in given component: is your question about making sure such situation is detected (in testsuite)?

Actually right now it can block when running out of credits in JGroups: 4.0.4 already provides a [non-blocking variant|http://belaban.blogspot.cz/2017/06/non-blocking-jgroups.html] but this is not used in our configuration yet - I should probably add that to the PR (as a separate commit).

> Use async operations in Hot Rod server
> --------------------------------------
>
>                 Key: ISPN-8729
>                 URL: https://issues.jboss.org/browse/ISPN-8729
>             Project: Infinispan
>          Issue Type: Enhancement
>          Components: Server
>    Affects Versions: 9.2.0.CR1
>            Reporter: Radim Vansa
>            Assignee: Radim Vansa
>
> The server should avoid context switches by starting commands directly from event loop instead of handing them off to another executor. This requires ISPN-8336 to make the async chain completely non-blocking.
> Along with the overhaul we should structure cache/counter/multimap operations nicely.



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