title: An error occurred getting entities in Linkedin's WhereHows
body: <p>After installing Linkedin's <code>WhereHows</code> following the github docs (<a href="https://github.com/linkedin/WhereHows/blob/master/wherehows-docs/getting-started.md#getting-started" rel="nofollow noreferrer">https://github.com/linkedin/WhereHows/blob/master/wherehows-docs/getting-started.md#getting-started</a>), logging into the web UI, and navigating to the Datasets tab, it complains</p>
  
  <pre><code>An error occurred getting entities
  
  SyntaxError: JSON.parse: unexpected character at line 3 column 1 of the JSON data
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/gSzhC.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gSzhC.png" alt="enter image description here"></a></p>
  
  <p>Looking at the developer console in the web browser, can see the error outputs</p>
  
  <pre><code>SyntaxError: JSON.parse: unexpected character at line 3 column 1 of the JSON data[Learn More]  vendor-01c52695e9f268de5628f7bec75d6bb1.js:65255:14
      tryCatcher http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65255:14
      invokeCallback http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65437:15
      publish http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65422:9
      Queue&lt;/Queue.prototype.invoke http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:27963:17
      Queue&lt;/Queue.prototype.flush http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:27848:25
      DeferredActionQueues&lt;/DeferredActionQueues.prototype.flush http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28035:25
      Backburner&lt;/Backburner.prototype.end http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28169:26
      Backburner/this._boundAutorunEnd http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28131:17
  Unhandled promise rejection SyntaxError: JSON.parse: unexpected character at line 3 column 1 of the JSON data
  Stack trace:
  tryCatcher@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65255:14
  invokeCallback@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65437:15
  publish@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:65422:9
  Queue&lt;/Queue.prototype.invoke@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:27963:17
  Queue&lt;/Queue.prototype.flush@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:27848:25
  DeferredActionQueues&lt;/DeferredActionQueues.prototype.flush@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28035:25
  Backburner&lt;/Backburner.prototype.end@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28169:26
  Backburner/this._boundAutorunEnd@http://localhost:9001/assets/assets/vendor-01c52695e9f268de5628f7bec75d6bb1.js:28131:17
  </code></pre>
  
  <p>Does anyone know what this error means and where to look to investigate further (first time working with <code>wherehows</code> and the given output on its own it not very helpful to my uninitiated self)?</p>
  
  <p>** Note my configuration variables for the Play frontend (<a href="https://github.com/linkedin/WhereHows/blob/master/wherehows-docs/getting-started.md#frontend-setup" rel="nofollow noreferrer">https://github.com/linkedin/WhereHows/blob/master/wherehows-docs/getting-started.md#frontend-setup</a>) look like</p>
  
  <pre><code>export WHZ_DB_USERNAME="wherehows"
  export WHZ_DB_PASSWORD="wherehows"
  export WHZ_DB_URL="jdbc:mysql://localhost/wherehows"
  
  export WHZ_ES_DATASET_URL="localhost:9200/wherehows"
  export WHZ_ES_METRIC_URL="localhost:9200/_nodes/stats" (honestly don't know if this is correct (don't use elasticsearch much))
  export WHZ_ES_FLOW_URL="localhost:9200/wherehows/flows_jobs"
  
  export YOUR_HDFS_BROWSER_LINK="http://node004.myco.local:8888/filebrowser/#"
  
  export WHZ_LDAP_URL="ldap://co.myco.local:389"
  export WHZ_LDAP_PRINCIPAL_DOMAIN="@co.local"
  export WHZ_LDAP_SEARCH_BASE="ou=mapr access,dc=co,dc=local"
  </code></pre>