MongoError: pool destroyed
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/connection/pool.js", line 804, in Pool.write
cb(new MongoError('pool destroyed'));
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/wireprotocol/command.js", line 107, in _command
pool.write(message, commandOptions, commandResponseHandler);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/wireprotocol/command.js", line 25, in command
_command(server, ns, cmd, options, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/wireprotocol/query.js", line 57, in Object.query
command(server, ns, findCmd, commandOptions, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/topologies/server.js", line 640, in Server.query
wireProtocol.query(this, ns, cmd, cursorState, options, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/find.js", line 24, in FindOperation.execute
server.query(this.ns.toString(), this.cmd, cursorState, this.options, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/execute_operation.js", line 163, in topology.selectServer
operation.execute(server, callbackWithRetry);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/topologies/server.js", line 828, in Server.selectServer
callback(null, this);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/topologies/topology_base.js", line 363, in Server.selectServer
return this.s.coreTopology.selectServer(selector, options, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/execute_operation.js", line 150, in executeWithServerSelection
topology.selectServer(serverSelectionOptions, (err, server) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/execute_operation.js", line 81, in executeOperation
return executeWithServerSelection(topology, operation, handler);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/cursor.js", line 545, in Cursor._initializeCursor
executeOperation(cursor.topology, cursor.operation, (err, result) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/cursor.js", line 191, in Cursor._initializeCursor
super._initializeCursor(callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/cursor.js", line 748, in nextFunction
self._initializeCursor((err, result) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/core/cursor.js", line 202, in Cursor._next
nextFunction(this, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/common_functions.js", line 235, in nextObject
cursor._next((err, doc) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/next.js", line 26, in NextOperation.execute
nextObject(cursor, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/execute_operation.js", line 83, in executeOperation
return operation.execute(handler);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/cursor.js", line 217, in Cursor.next
return executeOperation(this.topology, nextOperation, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/find_one.js", line 26, in FindOneOperation.execute
cursor.next((err, item) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/operations/execute_operation.js", line 83, in executeOperation
return operation.execute(handler);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/collection.js", line 1026, in Collection.<anonymous>
return executeOperation(this.s.topology, findOneOperation, callback);
File "/var/www/server/production/v2.3.8/node_modules/mongoose/node_modules/mongodb/lib/utils.js", line 639, in Collection.deprecated [as findOne]
return fn.apply(this, arguments);
File "NativeCollection.(anonymous function) [as findOne] (/var/www/server/production/v2.3.8/node_modules/mongoose/lib/drivers/node-mongodb-native/collection.js", line 166, in <unknown>
File "/var/www/server/production/v2.3.8/node_modules/mquery/lib/collection/node.js", line 42, in NodeCollection.findOne
this.collection.findOne(match, options, cb);
File "/var/www/server/production/v2.3.8/node_modules/mquery/lib/mquery.js", line 2024, in model.Query.Query.findOne
this._collection.findOne(conds, options, utils.tick(callback));
File "/var/www/server/production/v2.3.8/node_modules/mongoose/lib/query.js", line 2110, in model.Query.<anonymous>
Query.base.findOne.call(this, {}, (err, doc) => {
File "/var/www/server/production/v2.3.8/node_modules/mongoose/lib/helpers/query/wrapThunk.js", line 16, in model.Query._wrappedThunk [as _findOne]
fn.call(this, cb);
File "/var/www/server/production/v2.3.8/node_modules/kareem/index.js", line 278, in <unknown>
const ret = fn.apply(context, args.slice(0, end).concat(_cb));
File "/var/www/server/production/v2.3.8/node_modules/kareem/index.js", line 23, in <unknown>
callback(null);
File "internal/process/next_tick.js", line 132, in _combinedTickCallback
File "internal/process/next_tick.js", line 181, in process._tickCallback
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