Shawn Heisey commented on SOLR-9635:

Possibly even better:  Support both service.properties and 
service.XXX.properties, with entries from the service file superseding the 
global file.

> Implement Solr as two java processes -- one process to manage the other.
> ------------------------------------------------------------------------
>                 Key: SOLR-9635
>                 URL: https://issues.apache.org/jira/browse/SOLR-9635
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Shawn Heisey
> One idea that Mark Miller mentioned some time ago that I really like is the 
> idea of implementing Solr as two java processes, with one managing the other.
> When I think about this idea, what I imagine is a manager process with a 
> *very* small heap (I'm thinking single-digit megabytes) that is responsible 
> for starting a separate Solr process with configured values for many 
> different options, which would include the heap size.
> Basically, the manager process would replace most of bin/solr as we know it, 
> would be able to restart a crashed Solr, and the admin UI could have options 
> for changing heap size, restarting Solr, and other things that are currently 
> impossible.  It is likely that this idea would absorb or replace the SolrCLI 
> class.
> Initially, I intend this issue for discussion, and if the idea looks 
> workable, then we can work towards implementation.  There are plenty of 
> bikesheds to paint as we work the details.  I have some preliminary ideas 
> about some parts of it, which I will discuss in comments.

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