Thank you for replying. I checked the logs, earlier and could not find the reason; gets Error Code 204. Here is the latest log entry.
19:15:44.624GET5000 B182 msChrome 53/ 2604:2000:410f:1800:74da:b01f:2a14:8d3f - - [17/Oct/2016:19:15:44 -0400] "GET / HTTP/1.1" 500 - - "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/53.0.2785.143 Chrome/53.0.2785.143 Safari/537.36" "1.go-model.appspot.com" ms=182 cpu_ms=0 cpm_usd=0 loading_request=1 instance=00c61b117cd33cfbc5aca504be8b752ccc0db6da178f3ade65a0cd5aab05 app_engine_release=1.9.46 trace_id=- { metadata: { severity: "ERROR" projectId: "go-model" serviceName: "appengine.googleapis.com" zone: "us9" labels: { appengine.googleapis.com/request_id: "58055ba000ff0988d68fd5abdc0001737e676f2d6d6f64656c000131000100" appengine.googleapis.com/module_id: "default" appengine.googleapis.com/version_id: "1" appengine.googleapis.com/clone_id: "00c61b117cd33cfbc5aca504be8b752ccc0db6da178f3ade65a0cd5aab05" } timestamp: "2016-10-17T23:15:44.624854Z" } protoPayload: { @type: "type.googleapis.com/google.appengine.logging.v1.RequestLog" appId: "s~go-model" versionId: "1" requestId: "58055ba000ff0988d68fd5abdc0001737e676f2d6d6f64656c000131000100" ip: "2604:2000:410f:1800:74da:b01f:2a14:8d3f" startTime: "2016-10-17T23:15:44.624854Z" endTime: "2016-10-17T23:15:44.807514Z" latency: "0.182660s" method: "GET" resource: "/" httpVersion: "HTTP/1.1" status: 500 userAgent: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/53.0.2785.143 Chrome/53.0.2785.143 Safari/537.36" urlMapEntry: "_go_app" host: "1.go-model.appspot.com" wasLoadingRequest: true instanceIndex: -1 instanceId: "00c61b117cd33cfbc5aca504be8b752ccc0db6da178f3ade65a0cd5aab05" line: [ 0: { time: "2016-10-17T23:15:44.807389Z" severity: "INFO" logMessage: "This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application." } 1: { time: "2016-10-17T23:15:44.807396Z" severity: "ERROR" logMessage: "A problem was encountered with the process that handled this request, causing it to exit. This is likely to cause a new process to be used for the next request to your application. (Error code 204)" } ] appEngineRelease: "1.9.46" } insertId: "2016-10-17|16:15:49.808763-07|10.106.211.193|1276045338" log: "appengine.googleapis.com/request_log" httpRequest: { status: 500 } operation: { id: "58055ba000ff0988d68fd5abdc0001737e676f2d6d6f64656c000131000100" producer: "appengine.googleapis.com/request_id" } } 19:15:44.807This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application. 19:15:44.807A problem was encountered with the process that handled this request, causing it to exit. This is likely to cause a new process to be used for the next request to your application. (Error code 204) On Monday, October 17, 2016 at 6:17:20 PM UTC-4, Adam (Cloud Platform Support) wrote: > > Before doing any kind of changes to code, you'd want to check your logs > <https://cloud.google.com/logging/docs/view/logs_viewer> first, which > will often give a helpful stack trace to show where the error originated. > On a standard runtime instance you can view the request logs, and on a > flexible instance you can also view other logs like stderr, crash.log, and > vm.syslog which can help troubleshoot deployment errors. > > On Monday, October 17, 2016 at 4:00:27 PM UTC-4, Roger wrote: >> >> After uploading an app that was working before, this error results:*Error: >> Server Error* >> *The server encountered an error and could not complete your request.* >> >> *Please try again in 30 seconds.* >> >> >> To trace it down, I removed almost all code, and still get the error. >> >> >> In the console, it says: >> *This app has no instances deployed.* >> >> Anyone can help? >> > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to google-appengine@googlegroups.com. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/436b3aae-a7cc-49a3-bc68-0106c470bb3e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.