Spotted in logstash. An error line 502 of /srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/kartotherian-core/lib/core.js
kartotherian: Maximum zoom is 18 at Object.validateZoom (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/kartotherian-core/lib/core.js:502:15) at /srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/kartotherian-server/lib/tiles.js:37:25 at tryCatcher (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/bluebird/js/release/util.js:16:23) at Function.Promise.attempt.Promise.try (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/bluebird/js/release/method.js:39:29) at requestHandler (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/kartotherian-server/lib/tiles.js:30:23) at Layer.handle [as handle_request] (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/layer.js:95:5) at next (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/route.js:131:13) at Route.dispatch (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/route.js:112:3) at Layer.handle [as handle_request] (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/layer.js:95:5) at /srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:277:22 at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:349:14) at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:365:14) at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:365:14) at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:365:14) at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:365:14) at param (/srv/deployment/kartotherian/deploy-cache/revs/82c738b6434707725beb71ce1f9031c410a83d92/node_modules/express/lib/router/index.js:365:14)