spring 引导 + gcloud +“502 错误网关”

Question

I'm trying to deploy on gcloud this project: https://github.com/ITger/PolishAPI_sample locally works fine, but on gcloud I'm always receiving the 502 error.

mvn clean package appengine:deploy command run without problems.

In logs (gcloud app logs tail) there are no errors only Info and Debug messages. For a week I have been looking for a solution and trying many suggestions found in inte.net,I followed google, dzone, etc tutorials, with no luck.

I appreciate any help

EDITED (resp to John Hanley): ad 1: my code is more than 165 java files, so how to show it???

ad 2: app.yaml:

runtime: java
env: flex
instance_class: F2
runtime_config:
  jdk: openjdk8
#env_variables:
#  SPRING_PROFILES_ACTIVE: "gcp"
handlers:
  - url: /.*
    script: this field is required, but ignored
readiness_check:
  check_interval_sec: 15
  timeout_sec: 14
  failure_threshold: 2
  success_threshold: 2
  app_start_timeout_sec: 1200

ad 3: As I said there are NO ERRORS in logs only spring info and debug messages.

application.properties file:

debug=true
spring.application.name=polish-api-psd2
springfox.documentation.swagger.v2.path=/api-docs
server.port=${port:8080}
spring.jackson.date-format=pl.itger.PolishAPI.RFC3339DateFormat
#Mongo Config
spring.data.mongodb.database=PolishAPI
spring.data.mongodb.uri=mongodb+srv://polishapi-user:SECRET CLUSTER DATA
spring.data.mongodb.auto-index-creation=true
log4j.category.org.springframework.data.mongodb=DEBUG
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %40.40c:%4L - %m%n
logging.level.pl.itger=DEBUG
logging.level.root=WARN

App engine Firewall rules:

Priority 
1000
Action on match
Allow
IP range 
0.0.0.0/0

When I run the " **mvn clean spring-boot:run -P cloud-gcp** " in the Google Cloud Shell console the app starts fine, in the Web Preview the app starts well with the predefined swagger ui page:

https://8080-dot-10127310-dot-devshell.appspot.com/

with all models and api's displayed. When I invoke in the browser " https://8080-dot-10127310-dot-devshell.appspot.com/api-docs " also works well. Calling with curl any rest service on that url results in"Access Forbidden".

But , after mvn -DskipTests package appengine:deploy -P cloud-gcp nothing works, only 502 Bad Gateway .

[INFO] GCLOUD: Setting traffic split for service [default]...
[INFO] GCLOUD: ..............................................................done.
[INFO] GCLOUD: Deployed service [default] to [https://polish-api-psd2.appspot.com]
[INFO] GCLOUD:
[INFO] GCLOUD: You can stream logs from the command line by running:
[INFO] GCLOUD:   $ gcloud app logs tail -s default
[INFO] GCLOUD:
[INFO] GCLOUD: To view your application in the web browser run:
[INFO] GCLOUD:   $ gcloud app browse
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  09:15 min
[INFO] Finished at: 2019-12-12T15:49:39+01:00
[INFO] ------------------------------------------------------------------------
p_zerynger@cloudshell:~/PolishAPI_sample/server (polish-api-psd2)$

full Log (its very short, different from that after "mvn spring-boot:run -P cloud-gcp" I dont know why):

ar!/, jar:file:/app.jar!/BOOT-INF/lib/spring-data-jpa-2.1.10.RELEASE.jar!/, jar:file:/app.jar!/BOOT-INF/lib/spring-orm-5.2.2.RELEASE.jar!/, jar:file:/app.jar!/BOOT-INF/lib/spring-jdbc-5.2.2.RELEASE.jar!/, jar:file:/app.jar!/BOOT-INF/lib/aspectjrt-1.9.5.jar!/, jar:file:/app.jar!/BOOT-INF/lib/lombok-1.18.10.jar!/, jar:file:/app.jar!/BOOT-INF/lib/core-1.5.3.jar!/, jar:file:/app.jar!/BOOT-INF/lib/proxytoys-1.0.jar!/, jar:file:/app.jar!/BOOT-INF/lib/gson-2.8.6.jar!/, jar:file:/app.jar!/BOOT-INF/lib/annotations-17.0.0.jar!/, jar:file:/app.jar!/BOOT-INF/lib/jaxb-api-2.3.1.jar!/, jar:file:/app.jar!/BOOT-INF/lib/javax.activation-api-1.2.0.jar!/]
2019-12-12 14:48:53 default[1]
2019-12-12 14:48:53 default[1]    .   ____          _            __ _ _
2019-12-12 14:48:53 default[1]   /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
2019-12-12 14:48:53 default[1]  ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
2019-12-12 14:48:53 default[1]   \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
2019-12-12 14:48:53 default[1]    '  |____| .__|_| |_|_| |_\__, | / / / /
2019-12-12 14:48:53 default[1]   =========|_|==============|___/=/_/_/_/
2019-12-12 14:48:53 default[1]   :: Spring Boot ::        (v2.2.2.RELEASE)
2019-12-12 14:48:53 default[1]
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.093  INFO 1 --- [           main] p.i.P.PolishAPI_2_1_2_SpringBoot         : Starting PolishAPI_2_1_2_SpringBoot v1.0.1 on e1b35acb6032 with PID 1 (/app.jar started by root in /)
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.096 DEBUG 1 --- [           main] p.i.P.PolishAPI_2_1_2_SpringBoot         : Running with Spring Boot v2.2.2.RELEASE, Spring v5.2.2.RELEASE
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.098  INFO 1 --- [           main] p.i.P.PolishAPI_2_1_2_SpringBoot         : No active profile set, falling back to default profiles: default
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.102 DEBUG 1 --- [           main] o.s.boot.SpringApplication               : Loading source class pl.itger.PolishAPI.PolishAPI_2_1_2_SpringBoot
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.341 DEBUG 1 --- [           main] o.s.b.c.c.ConfigFileApplicationListener  : Loaded config file 'jar:file:/app.jar!/BOOT-INF/classes!/application.properties' (classpath:/application.properties)
2019-12-12 14:48:54 default[1]  2019-12-12 14:48:54.345 DEBUG 1 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@6c3708b3
2019-12-12 14:52:42 default[1]  I1212 14:51:56.693214    26 callbacks_monitor.cc:66] Cloud Debugger call "JVMTI:ClassPrepare" completed after 25847 ms

+++++++++ in cloud http load balancer log I found this:

jsonPayload: {
  @type: "type.googleapis.com/google.cloud.loadbalancing.type.LoadBalancerLogEntry"   
  statusDetails: "failed_to_connect_to_backend"   
 }

It's crazy... now timeout:

[INFO] GCLOUD: ERROR: (gcloud.app.deploy) Error Response: [4] App Engine Flexible timed out while configuring resources, internal operation projects/polish-api-psd2/regions/europe-west1/operations/3343fc51-2991-4da1-ba45-128bd897d92f

Answer 1

Every deployment has a version number assigned to it. Verify if that version number appears in the "versions" section under "app engine" of your GCP project. If the version number does appear, logs will be provided in StackDriver detailing any possible deployment errors that occurred.

If the version number does not appear then re-deploy the project and this time enable the verbosity flag to generate deploy logs.[1]

Lastly, try deploying a bare minimum "Hello World" app and see if that works if the issue is not code-related.

[1] https://cloud.google.com/sdk/gcloud/reference/#--verbosity

Answer 2

Add

resources:
  memory_gb: 4

Inside your yaml file.

Answer 3

I don't have a solution to this but have been running into the same thing. In attempting to migrate a web application using a spring boot backend I've run into and incredible and frustrating amount of issues.

I've reverted to deploying a hello world spring boot app that I can see work. I've started by pulling all of the dependencies over from my webapp introducing them piece meal. As the original poster says, the startup logs have zero/no/none indications of ANY errors in the startup logs. When uncommenting a dependency such as com.google.cloud:google-cloud-logging-logback:0.129.9-alpha I'll begin to get the 502 errors after deploy. Unfortunately this is not the only dependency this is happening for. I'm just simply trying to isolate ALL of the dependencies which cause this behavior. Again application logs show no indication of any error and they startup fine. It's simply by including some dependencies it causes application to be unavailable bc of 502s. Once I isolate all of the dependencies which are making this happen not exactly sure what I'll do next in order to resolve this but isolating them seems to be my only course of action. This application works completely fine in local development.

If you are reading this and considering google cloud I STRONGLY RECOMMEND YOU LOOK AT OTHER CLOUD PROVIDERS. Google cloud support, documentation is absolute garbage and there is zero indication in the platform or logs what is going wrong when a problem occurs. I hope comments like this will cause action on google's part because this technology ABSOLUTE GARBAGE. I'm currently hamstrung by my client and need to use this but would have migrated away if I had the choice. I generally think google is good company but their suite of cloud products has made me come to the hard realization they do in fact lay giant hot steamy carl's for products. This comment hopefully will get the attention of someone there to take action on this giant garbage dump of a product.