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From: "Markus Ruggiero (rucotec)" <markus.ruggiero@rucotec.ch>
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Subject: Non instance found but Monitor shows it as being up and running
Message-Id: <33C090D4-23F7-4AA9-8A78-2D192AA77CD7@rucotec.ch>
Date: Tue, 15 Nov 2022 16:20:58 +0100
To: WebObjects & WOnder Development <webobjects-dev@wocommunity.org>


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This is a weird one.

We have a WOApp deployed on Ubuntu 20.04.5 LTS on a cloud server. App is =
classically controlled by JavaMonitor and instance (currently only one) =
is scheduled for restart every day at 5am. Once in a while the first =
user in the morning is greeted by =E2=80=9Cno instance found=E2=80=9D, =
but checking with JavaMonitor everything looks good and there are not =
deaths reported! Manually restarting the instance clears things up. It =
seems that sometimes the instance does not come up fully or the =
connection with WOAdaptor to Apache breaks. Anyone having had similar =
issues? We are running a fairly up-to-date Apache (Server version: =
Apache/2.4.41 (Ubuntu) Server built:   2022-06-14T13:30:55). WOAdaptor =
is the one built by Maik (thanks a lot for this).

Another weird thing is that we have various other applications running =
on the same and on other similarly set up servers, none of them having =
any issues. Any idea on that?

Is there a way to externally trigger Monitor or WOtaskd to restart an =
instance? Does the REST interface support this and how would I call it =
with e.g. curl? I could then create my own heartbeat script testing and =
restarting instances through Apache.

Thanks for any help
---markus---


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