fix: reduce error messages

Author: jedwards1211

package.json

@@ -17,9 +17,9 @@
     "flow:watch": "flow-watch -e js,js.flow,flowconfig --ignore es/ --ignore node_modules/ --watch .flowconfig --watch src/ --watch test/",
     "clean": "rimraf es lib $(cd src; ls) *.js.flow",
     "build": "npm run clean && babel src --out-dir es && flow-copy-source -v src/ es && cross-env BABEL_ENV=es5 babel src --out-dir . && flow-copy-source -v src/ .",
-    "test": "cross-env NODE_ENV=production BABEL_ENV=es5 mocha $npm_package_config_mocha && cross-env NODE_ENV=production BABEL_ENV=coverage nyc --reporter=lcov --reporter=text mocha $npm_package_config_mocha",
-    "test:watch": "cross-env NODE_ENV=production BABEL_ENV=test mocha --watch $npm_package_config_mocha",
-    "test:debug": "cross-env NODE_ENV=production BABEL_ENV=test mocha --inspect-brk $npm_package_config_mocha",
+    "test": "defaultenv env/local.js cross-env NODE_ENV=production BABEL_ENV=es5 mocha $npm_package_config_mocha && defaultenv env/local.js cross-env NODE_ENV=production BABEL_ENV=coverage nyc --reporter=lcov --reporter=text mocha $npm_package_config_mocha",
+    "test:watch": "defaultenv env/local.js cross-env NODE_ENV=production BABEL_ENV=test mocha --watch $npm_package_config_mocha",
+    "test:debug": "defaultenv env/local.js cross-env NODE_ENV=production BABEL_ENV=test mocha --inspect-brk $npm_package_config_mocha",
     "codecov": "nyc report --reporter=text-lcov > coverage.lcov; codecov",
     "prepublishOnly": "npm run clean && npm run prettier:check && npm run lint && flow && npm test && npm run build",
     "open:coverage": "open coverage/lcov-report/index.html",

src/index.js

@@ -111,7 +111,9 @@ export class ShardRegistrar extends EventEmitter<Events> {
     let startTime = Date.now()
     let delay
     this._register().catch((err: Error) => {
-      console.error(err.stack) // eslint-disable-line no-console
+      if (this._running) {
+        console.error(err.stack) // eslint-disable-line no-console
+      }
       delay = 100
     })
     delay = Math.max(
@@ -134,6 +136,7 @@ export class ShardRegistrar extends EventEmitter<Events> {
   async _register(): Promise<void> {
     const { _holder: holder } = this
     const { cluster, heartbeatInterval, gracePeriod } = this._options
+    const interval = `${heartbeatInterval + gracePeriod} seconds`
 
     try {
       if (!this._upsertedCluster) {
@@ -142,7 +145,6 @@ export class ShardRegistrar extends EventEmitter<Events> {
       }
 
       await this._query('BEGIN;')
-      const interval = `${heartbeatInterval + gracePeriod} seconds`
       let result
 
       await this._query(lockQuery, [cluster])