[jboss-jira] [JBoss JIRA] (WFCORE-1147) Eliminate ProcessController

[David Lloyd (JIRA)]

    [ https://issues.jboss.org/browse/WFCORE-1147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13132822#comment-13132822 ] 

David Lloyd commented on WFCORE-1147:
-------------------------------------

Because it's reliable i.e. there are fewer failure states.  We don't have to worry about re-establishing if the child gets "lost".  If the output-to-stdin stream hangs or dies, we can just immediately kill the child process because it's very, very likely to be a catastrophic error.  If the return-to-server dies, we can continue passing orders to the client, including instructions for re-connecting the result stream.

>From the client perspective, if the stream-from-server ends, we exit immediately (with an exit code that communicates what happened to the server).  If the stream-to-server dies, we just close it down and await new connect instructions, possibly buffering operation results in the meantime.  This helps to ensure that no zombie servers will survive after the HC dies, which is AFAICT the most correct/reliable behavior.

> Eliminate ProcessController
> ---------------------------
>
>                 Key: WFCORE-1147
>                 URL: https://issues.jboss.org/browse/WFCORE-1147
>             Project: WildFly Core
>          Issue Type: Task
>          Components: Server
>            Reporter: David Lloyd
>
> We should eliminate ProcessController and directly have the HC control the servers.  This should greatly simplify the code and add more power and flexibility to the management and lifecycle of server JVMs.



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