Shawn Heisey created SOLR-7850:
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             Summary: Move user customization out of solr.in.* scripts
                 Key: SOLR-7850
                 URL: https://issues.apache.org/jira/browse/SOLR-7850
             Project: Solr
          Issue Type: Improvement
          Components: scripts and tools
    Affects Versions: 5.2.1
            Reporter: Shawn Heisey
            Priority: Minor


I've seen a fair number of users customizing solr.in.* scripts to make changes 
to their Solr installs.  I think the documentation suggests this, though I 
haven't confirmed.

One possible problem with this is that we might make changes in those scripts 
which such a user would want in their setup, but if they replace the script 
with the one in the new version, they will lose their customizations.

I propose instead that we have the startup script look for and utilize a user 
customization script, in a similar manner to linux init scripts that look for 
/etc/default/packagename, but are able to function without it.  I'm not 
entirely sure where the script should live or what it should be called.  One 
idea is server/etc/userconfig.\{sh,cmd\} ... but I haven't put a lot of thought 
into it yet.

If the internal behavior of our scripts is largely replaced by a small java app 
as detailed in SOLR-7043, then the same thing should apply there -- have a 
config file for a user to specify settings, but work perfectly if that config 
file is absent.



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