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From "Burn Lewis (JIRA)" <uima-...@incubator.apache.org>
Subject [jira] Commented: (UIMA-1109) Need ability to quiesce an instance of a service
Date Wed, 01 Jul 2009 22:16:47 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12726245#action_12726245

Burn Lewis commented on UIMA-1109:

Tested using the command-line "q" and also with completeProcessingAndStop via JMX (had to
use a Sun JVM for both the service and jconsole in order to connect) ... both caused a ServiceShutdownException
to be sent to the client which is unexpected.
Also when quiesced via JMX the service did not exit ... perhaps is still waiting for a 'q'
or 's'.

When stopped with "s" or the JMX stopNow() the service stopped but did not exit ... required
control-C.  Client also got a ServiceShutdownException but maybe that's to be expected with
a hard shutdown.

> Need ability to quiesce an instance of a service
> ------------------------------------------------
>                 Key: UIMA-1109
>                 URL: https://issues.apache.org/jira/browse/UIMA-1109
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Async Scaleout
>            Reporter: Burn Lewis
>            Assignee: Jerry Cwiklik
> We can deploy extra instances of a service seamlessly but also need a mechanism to undeploy
without losing any work, i.e. ask an instance to stop processing messages and shutdown when
it finishes its current work.

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