Spring Boot runs scheduled job twice, But it works fine in the local

Question

My Problem is that the scheduled method "subscription" is called twice.

This is the template I use.

https://github.com/JetBrains/gcp-samples/tree/master/google-appengine-sample

When I use $mvn spring-boot:run is working fine in local

But I use $mvn appengine:deploy scheduled is called twice.

My code:

@Component
class ScheduledTasks {
    @Scheduled(cron = "0 0 * * * *")
    fun subscription() {
            var hasBeenInitialized = false
            val firebaseApps = FirebaseApp.getApps()
            for (app in firebaseApps) {
                if (app.name == FirebaseApp.DEFAULT_APP_NAME) {
                    hasBeenInitialized = true
                }
            }
            if(!hasBeenInitialized) {
                InitializeGCP()
            }

            var db = FirestoreClient.getFirestore()
            val query = db.collection("subscription").get()
            val querySnapshot = query.get()
            val documents = querySnapshot.documents

            for (document in documents) {
                if (localTime.equals(document.getString("time"))) {
                    ...post to my ChatBot Api...
                }
            }
        }
    }
}

My app.yaml:

runtime: java
env: flex
runtime_config:
  jdk: openjdk8

Possible duplicate of [Java Spring @Scheduled tasks executing twice](https://stackoverflow.com/questions/14242310/java-spring-scheduled-tasks-executing-twice) — nortontgueno, Feb 21 '19 at 12:15
And... I also want to understand why this problem does not happen in local — HE XUAN-WEI, Feb 21 '19 at 12:31

score 0 · Answer 1 · answered Feb 21 '19 at 12:44

0

I check my GCP.

I have two instances in the same version.

Is this related?

answered Feb 21 '19 at 12:44

HE XUAN-WEI

15
7

score 0 · Accepted Answer · answered Feb 21 '19 at 12:51

0

Check is there any two instance of your server? this cron job will be unique for only one server.

answered Feb 21 '19 at 12:51

Nishant Raj

76
8

Spring Boot runs scheduled job twice, But it works fine in the local

2 Answers2