Shawn Heisey created SOLR-9635:

             Summary: Implement Solr as two java processes -- one process to 
manage the other.
                 Key: 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 

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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