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Date: Mon, 3 Aug 2009 08:33:14 -0700 (PDT)
From: "Damien Katz (JIRA)" <jira@apache.org>
To: dev@couchdb.apache.org
Subject: [jira] Commented: (COUCHDB-370) If the CouchDB vm is dies or is
 killed, view subprocesses (js) are not automatically killed
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    [ https://issues.apache.org/jira/browse/COUCHDB-370?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12738390#action_12738390 ] 

Damien Katz commented on COUCHDB-370:
-------------------------------------

While I agree we should prevent unnecessary VM exits, we can't prevent them all and fortunately the VM is designed to terminate and restart quickly. This is part of CouchDB's design too, restarts are always fast.

A correct solution is one or more watchdog processes that watch the VM and the subprocess, and if the VM dies, it kills all the subprocesses and then itself.

> If the CouchDB vm is dies or is killed, view subprocesses (js) are not automatically killed
> -------------------------------------------------------------------------------------------
>
>                 Key: COUCHDB-370
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-370
>             Project: CouchDB
>          Issue Type: Bug
>          Components: JavaScript View Server
>    Affects Versions: 0.9
>            Reporter: Damien Katz
>            Priority: Minor
>
> If CouchDB dies or is killed, it's subprocess are not forcefully killed. If the subprocesses are in infinite loops, they will never die. We need some kind of external watchdog process, or processes that kill the subprocess automatically if the CouchDB erlang vm dies.

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