title: Why does Google Cloud logging show response of 200 while also tagging log entry as error?
body: <p>Below is a screenshot from Google Cloud console logging.  It shows an error while calling /get_user from my server.  However the response status is 200 which should mean SUCCESS.  How is this possible?  Also what is the actual error? None of the lines below give anything remotely resembling an error message. </p>
  
  <p><a href="https://i.stack.imgur.com/tboXp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tboXp.png" alt="enter image description here"></a></p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>{
   httpRequest: {
    status:  200   
   }
   insertId:  "59f27485000f32ab85505e70"  
   labels: {
    clone_id:  "00c61b117c384e485a095752c23b4277d1844399c104ae542bd367f2b52df046b21a56584c7d"   
   }
   logName:  "projects/villagethegame111/logs/appengine.googleapis.com%2Frequest_log"  
   operation: {
    first:  true   
    id:  "59f2748500ff00ff5dbae8f3b5ad0001737e76696c6c61676574686567616d65313131000170726f643230313730393233000100"   
    last:  true   
    producer:  "appengine.googleapis.com/request_id"   
   }
   protoPayload: {
    @type:  "type.googleapis.com/google.appengine.logging.v1.RequestLog"   
    appEngineRelease:  "1.9.54"   
    appId:  "s~villagethegame111"   
    cost:  8.0801e-8   
    endTime:  "2017-10-26T23:49:25.076502Z"   
    finished:  true   
    first:  true   
    host:  "villagethegame111.appspot.com"   
    httpVersion:  "HTTP/1.1"   
    instanceId:  "00c61b117c384e485a095752c23b4277d1844399c104ae542bd367f2b52df046b21a56584c7d"   
    instanceIndex:  -1   
    ip:  "38.102.224.170"   
    latency:  "0.052508s"   
    line: [
     0: {
      logMessage:  "200 OK"     
      severity:  "ERROR"     
      time:  "2017-10-26T23:49:25.068980Z"     
     }
    ]
    megaCycles:  "29"   
    method:  "GET"   
    requestId:  "59f2748500ff00ff5dbae8f3b5ad0001737e76696c6c61676574686567616d65313131000170726f643230313730393233000100"   
    resource:  "/api/get_user"   
    responseSize:  "272"   
    startTime:  "2017-10-26T23:49:25.023994Z"   
    status:  200   
    urlMapEntry:  "village.api.root"   
    userAgent:  "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36"   
    versionId:  "prod20170923"   
   }
   receiveTimestamp:  "2017-10-26T23:49:26.000113484Z"  
   resource: {
    labels: {
     module_id:  "default"    
     project_id:  "villagethegame111"    
     version_id:  "prod20170923"    
     zone:  "us14"    
    }
    type:  "gae_app"   
   }
   severity:  "ERROR"  
   timestamp:  "2017-10-26T23:49:25.023994Z"  
  }</code></pre>
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  </p>