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https://issues.apache.org/jira/browse/NUTCH-2883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17418815#comment-17418815
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ASF GitHub Bot commented on NUTCH-2883:
---------------------------------------
sebastian-nagel commented on pull request #691:
URL: https://github.com/apache/nutch/pull/691#issuecomment-925304439
Hi @lewismc! Sorry, it took longer to get back...
Finally found, why server and webapp didn't work (`docker prune` didn't
help):
- the environment variables `SERVER_HOST`, `SERVER_PORT` and `WEBAPP_PORT`
were defined but empty
- after some trial I've discovered that [ARG instructions must be within the
FROM block they are used
in](https://docs.docker.com/engine/reference/builder/#understand-how-arg-and-from-interact).
After moving the ARG lines into the right places (aebf682) I was able to start
the server. Could you verify this solution?
Another point: after the webapp was moved into separate repository (see
NUTCH-2886), it needs to be installed separately in the Dockerfile. Right now
it fails with:
```
==> /var/log/supervisord/nutchwebapp_stderr.log <==
Error: Could not find or load main class webapp
Caused by: java.lang.ClassNotFoundException: webapp
```
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> Provide means to run server and webapp as persistent services in Docker
> container
> ---------------------------------------------------------------------------------
>
> Key: NUTCH-2883
> URL: https://issues.apache.org/jira/browse/NUTCH-2883
> Project: Nutch
> Issue Type: Improvement
> Components: docker, nutch server, web gui
> Affects Versions: 1.18
> Reporter: Lewis John McGibbney
> Assignee: Lewis John McGibbney
> Priority: Major
> Fix For: 1.19
>
>
> Some conditional logic and some Docker build arguments would allow a user to
> run the nutch server alone or both the nutch server and webapp as long
> running services.
> This could be useful for users who want to remotely interact with Nutch via
> REST where jobs may actually be executed on yet another remote deployment.
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