Request handlers can leak pooled Validator objects

[csw]

Some code paths in the request handlers can leak Validator objects obtained from one of the object pools, such as the select_transcripts parameter validation error in /variantvalidator:

rest_variantValidator/rest_VariantValidator/endpoints/variantvalidator_endpoints.py

Line 74 in 36f969a

return {"Not Found": "Setting select_transcripts to 'all' or 'raw' is deprecated for genomic "

I've worked up a change that retrieves items with a context manager to ensure that they're returned to the pool, and lets the pools grow dynamically up to their configured maximum size: Genomenon@acc8592. Let me know if this seems reasonable, and I'll be happy to make a PR for it.

[Peter-J-Freeman]

hi @csw . I sent some emails around this.

If you can PR your changes into the develop_3.0.0 branch please and we can take a look. It would be great to get some dynamic handling