Tim Owen created SOLR-15085:
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Summary: EmbeddedSolrServer calls shutdown on a provided
CoreContainer
Key: SOLR-15085
URL: https://issues.apache.org/jira/browse/SOLR-15085
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: Server, SolrJ
Affects Versions: master (9.0)
Reporter: Tim Owen
There are essentially 2 ways to create an EmbeddedSolrServer object, one by
passing in a CoreContainer object, and the other way creates one internally
on-the-fly. The current behaviour of the close method calls shutdown on the
CoreContainer, regardless of where it came from.
I believe this is not good behaviour for a class that doesn't control the
lifecycle of the passed-in CoreContainer. In fact, there are 4 cases among the
codebase where a subclass of EmbeddedSolrServer is created just to override
this behaviour (with a comment saying it's unwanted).
In my use-case I create EmbeddedSolrServer instances for cores as and when I
need to work with them, but the CoreContainer exists for the duration. I don't
want the whole container shut down when I'm done with just one of its cores.
You can workaround it by just not calling close on the EmbeddedSolrServer
object, but that's risky especially if you use a try-with-resources as close is
called automatically then.
Fix is to keep track of whether the CoreContainer was created internally or
not, and only shut it down if internal. I will attach my patch PR.
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