Find not working

[TDAS <ta...@me.com.INVALID>]

I’ve migrated couchdb over to a new server, using replication. Latest couchdb running on Debian 11.

Everything is working except ‘find’ (using Nano, from a NodeJs app).

It’s a long time since I set the search tree up, but essentially it looks like the below (if of interest) - I can’t really remember how it works!

Is there anything I need to do since moving to the new server to make it work? I can’t see any obvious errors in the couchdb logs. Client times out, and I get this in the node logs (I think this is coming from the error, but it’s production, so difficult to pinpoint atm):

0|main  | Error: error happened in your connection
0|main  |     at responseHandler (/var/app/node_modules/nano/lib/nano.js:120:16)
0|main  |     at axios.then.catch (/var/app/node_modules/nano/lib/nano.js:405:13)
0|main  |     at process._tickCallback (internal/process/next_tick.js:68:7)

var subquery = {      // q is search term
        selector: {
            $and: [
                {
                    $or: [{ type: { $eq: 'case' } }, { type: { $eq: 'user' } }, { type: { $eq: 'property' } }],
                },
                {
                    $or: [
                        { email: { $regex: q } },
                        { firstname: { $regex: q } },
                        { lastname: { $regex: q } },
                        { p_forenames: { $regex: q } },
                        { p_surname: { $regex: q } },
                        { p_forenames2: { $regex: q } },
                        { p_surname2: { $regex: q } },
                        { n_company_name: { $regex: q } },
                        { n_property_address: { $regex: q } },
                        { n_property_address_postcode: { $regex: q } },
                        { c_provider: { $regex: q } },
                        { c_policy_number: { $regex: q } },
                        { c_product_code: { $regex: q } },
                    ],
                },
            ],
        },
        fields: [
            'type',
            '_id',
            'firstname',
            'lastname',
            'p_forenames',
            'p_surname',
            'p_forenames2',
            'p_surname2',
            'email',
            'role',
            'clientid',
            'adviser',
            'p_joint',
            'n_property_address',
            'n_property_address_postcode',
            'c_provider',
            'c_policy_number',
            'c_product_code',
            'mb_deleted',
            'n_company_name',
            'created',
        ],
        limit: 50,
    };

    couch.find(subquery, function(err, data) { ... })