[infinispan-issues] [JBoss JIRA] (ISPN-8822) Performance degradation when running Spark jobs

[Radim Vansa (JIRA)]

    [ https://issues.jboss.org/browse/ISPN-8822?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13534889#comment-13534889 ] 

Radim Vansa commented on ISPN-8822:
-----------------------------------

[~gustavonalle] The 2s delay is introduced in {{ChannelFactory.destroy}}: {{eventLoopGroup.shutdownGracefully().sync().getNow();}} uses 2 second delay:
{quote}
Graceful shutdown ensures that no tasks are submitted for 'the quiet period' (usually a couple seconds) before it shuts itself down.  If a task is submitted during the quiet period, it is guaranteed to be accepted and the quiet period will start over.
{quote}
... and that method is preferred compared to regular {{shutdown}}. We could try to find out why Netty uses this pattern to closing the event loop.

> Performance degradation when running Spark jobs
> -----------------------------------------------
>
>                 Key: ISPN-8822
>                 URL: https://issues.jboss.org/browse/ISPN-8822
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Hot Rod
>    Affects Versions: 9.2.0.CR2
>            Reporter: Gustavo Fernandes
>
> When trying to upgrade the [Spark connector |https://github.com/infinispan/infinispan-spark/] to use Infinispan 9.2.0.CR2, the test suite runs about 10x slower. 



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