Reinitialization of Spring context when using SnapStart

[maschnetwork]

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Serverless Java Container version: 2.0.0

Implementations: Spring Boot 3

Framework version: SpringBoot 3.1.4 (or higher)

Frontend service: REST API

Deployment method: CDK

Scenario

During the first call to a SnapStart enabled Lambda function the Spring Context re-initializes which results in a high request duration of around 4-5 seconds for a standard Spring Boot Application (accessing a PostgreSQL DB). In prior versions (tested with 2.0.0-M2) this does not happen and the request duration is much faster (1-2 seconds). There seems to be an issue with the latest version and how the initialization of the context is handled.

Expected behavior

The Spring context should not re-initialize as it should be stored within the SnapShot.

Actual behavior

The spring context re-initializes

Steps to reproduce

• Enable SnapStart on a function with the Serverless Java Container v 2.0.0
• See how the Spring Context is re-intitialized in the logs and the restore takes 4+ seconds
• Create a new function version with previous Serverless Java Container v 2.0.0-M2
• No context re-intitialization and fast startup within 1-2 seconds

Full log output

Paste the full log output from the Lambda function's CloudWatch logs

With 2.0.0 (Issue - Spring context re-initializes):

2024-03-19T15:19:30.178Z | RESTORE_START Runtime Version: java:17.v23 Runtime Version ARN: arn:aws:lambda:eu-central-1::runtime:4fa911b5b8e2bf34f399aa1563b223204a0d0ab2cbfdeba6cd2132baa63f075f
-- | --
  | 2024-03-19T15:19:31.313Z | RESTORE_REPORT Restore Duration: 1134.71 ms
  | 2024-03-19T15:19:31.319Z | START RequestId: 6c3bxX18-8fb4-47c4-9cba-7739840aeaa3 Version: 1
  | 2024-03-19T15:19:31.966Z | . ____ _ __ _ _
  | 2024-03-19T15:19:31.966Z | /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
  | 2024-03-19T15:19:31.966Z | ( ( )\___ \| '_ \| '_\| \| '_ \/ _` \| \ \ \ \
  | 2024-03-19T15:19:31.966Z | \\/ ___)\| \|_)\| \| \| \| \| \|\| (_\| \| ) ) ) )
  | 2024-03-19T15:19:31.966Z | ' \|____\| .__\|_\| \|_\|_\| \|_\__, \| / / / /
  | 2024-03-19T15:19:31.966Z | =========\|_\|==============\|___/=/_/_/_/
  | 2024-03-19T15:19:31.970Z | :: Spring Boot :: (v3.2.3)
  | 2024-03-19T15:19:32.094Z | 2024-03-19T15:19:32.093Z INFO 8 --- [ Thread-0] c.a.s.p.s.AwsSpringWebRuntimeInitializer : AWS Handler: com.amazonaws.serverless.proxy.spring.SpringDelegatingLambdaContainerHandler
  | 2024-03-19T15:19:32.104Z | 2024-03-19T15:19:32.103Z INFO 8 --- [ Thread-0] o.s.boot.SpringApplication : Starting application using Java 17.0.10 with PID 8 (started by sbx_user1051 in /var/task)
  | 2024-03-19T15:19:32.105Z | 2024-03-19T15:19:32.105Z INFO 8 --- [ Thread-0] o.s.boot.SpringApplication : No active profile set, falling back to 1 default profile: "default"
  | 2024-03-19T15:19:32.773Z | 2024-03-19T15:19:32.773Z INFO 8 --- [ Thread-0] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
  | 2024-03-19T15:19:32.824Z | 2024-03-19T15:19:32.823Z INFO 8 --- [ Thread-0] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 39 ms. Found 1 JPA repository interface.
  | 2024-03-19T15:19:33.163Z | 2024-03-19T15:19:33.163Z INFO 8 --- [ Thread-0] o.s.c.f.s.w.ServerlessAutoConfiguration : Configuring Serverless Web Container
  | 2024-03-19T15:19:33.268Z | 2024-03-19T15:19:33.267Z INFO 8 --- [ Thread-0] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
  | 2024-03-19T15:19:33.630Z | 2024-03-19T15:19:33.630Z INFO 8 --- [ Thread-0] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection org.postgresql.jdbc.PgConnection@21d01d84
  | 2024-03-19T15:19:33.632Z | 2024-03-19T15:19:33.631Z INFO 8 --- [ Thread-0] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
  | 2024-03-19T15:19:33.667Z | 2024-03-19T15:19:33.667Z INFO 8 --- [ Thread-0] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
  | 2024-03-19T15:19:33.711Z | 2024-03-19T15:19:33.711Z INFO 8 --- [ Thread-0] org.hibernate.Version : HHH000412: Hibernate ORM core version [WORKING]
  | 2024-03-19T15:19:33.739Z | 2024-03-19T15:19:33.739Z INFO 8 --- [ Thread-0] o.h.c.internal.RegionFactoryInitiator : HHH000026: Second-level cache disabled
  | 2024-03-19T15:19:33.932Z | 2024-03-19T15:19:33.932Z INFO 8 --- [ Thread-0] o.s.o.j.p.SpringPersistenceUnitInfo : No LoadTimeWeaver setup: ignoring JPA class transformer
  | 2024-03-19T15:19:33.978Z | 2024-03-19T15:19:33.977Z WARN 8 --- [ Thread-0] org.hibernate.orm.deprecation : HHH90000025: PostgreSQLDialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)
  | 2024-03-19T15:19:34.699Z | 2024-03-19T15:19:34.699Z INFO 8 --- [ Thread-0] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
  | 2024-03-19T15:19:34.702Z | 2024-03-19T15:19:34.702Z INFO 8 --- [ Thread-0] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
  | 2024-03-19T15:19:35.246Z | 2024-03-19T15:19:35.246Z INFO 8 --- [ Thread-0] o.s.c.f.s.web.ServerlessServletContext : Initializing Spring DispatcherServlet 'dispatcherServlet'
  | 2024-03-19T15:19:35.246Z | 2024-03-19T15:19:35.246Z INFO 8 --- [ Thread-0] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
  | 2024-03-19T15:19:35.248Z | 2024-03-19T15:19:35.248Z INFO 8 --- [ Thread-0] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
  | 2024-03-19T15:19:35.248Z | 2024-03-19T15:19:35.248Z INFO 8 --- [ Thread-0] o.s.c.f.s.w.ServerlessAutoConfiguration : Initalized DispatcherServlet
  | 2024-03-19T15:19:35.264Z | 2024-03-19T15:19:35.264Z INFO 8 --- [ Thread-0] o.s.boot.SpringApplication : Started application in 222.596 seconds (process running for 5.694)
  | 2024-03-19T15:19:35.267Z | 2024-03-19T15:19:35.267Z INFO 8 --- [ Thread-0] o.s.c.f.serverless.web.ServerlessMVC : Application is started successfully.
  | 2024-03-19T15:19:35.496Z | END RequestId: 6c3bxX18-8fb4-47c4-9cba-7739840aeaa3
  | 2024-03-19T15:19:35.496ZREPORT RequestId: 6c3bxX18-8fb4-47c4-9cba-7739840aeaa3	Duration: 4177.34 ms	Billed Duration: 4410 ms	Memory Size: 2048 MB	Max Memory Used: 211 MB	Restore Duration: 1134.71 ms	Billed Restore Duration: 232 ms

With 2.0.0-M2 (No Issue ):

2024-03-19T16:26:58.348Z | RESTORE_START Runtime Version: java:17.v23 Runtime Version ARN: arn:aws:lambda:eu-central-1::runtime:4fa911b5b8e2bf34f399aa1563b223204a0d0ab2cbfdeba6cd2132baa63f075f
-- | --
  | 2024-03-19T16:26:59.522Z | RESTORE_REPORT Restore Duration: 1174.67 ms
  | 2024-03-19T16:26:59.530Z | START RequestId: cd612f79-c02e-4b13-9a0b-dd4445855d3c Version: 3
  | 2024-03-19T16:27:00.001Z | END RequestId: cd612f79-c02e-4b13-9a0b-dd4445855d3c
  | 2024-03-19T16:27:00.001ZREPORT RequestId: cd612f79-c02e-4b13-9a0b-dd4445855d3c	Duration: 470.48 ms	Billed Duration: 744 ms	Memory Size: 2048 MB	Max Memory Used: 208 MB	Restore Duration: 1174.67 ms	Billed Restore Duration: 273 ms

[mbfreder]

Thanks for raising this. Let me reproduce and get back to you.

[deki]

@maschnetwork changes have been merged to the main branch in case you want to verify. A release will probably done tomorrow.

[deki]

Release 2.0.1 is now available.