# Spring Boot 4

Major version 4 of Spring Boot, a framework for creating stand-alone, production-grade Spring-based Java applications.

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## Java Weekly, Issue 661

DevFeed: [Java Weekly, Issue 661](<https://devfeed.tech/articles/java-weekly-issue-661-4500.md>)

Original publisher: [Read original article](<https://www.baeldung.com/java-weekly-661>)

Author: baeldung

Published: 2026-08-26T17:15:42Z

Content type: article

Language: en

Sources: [Baeldung](<https://devfeed.tech/sources/baeldung.md>)

Topics: [IntelliJ IDEA](<https://devfeed.tech/topics/intellij-idea.md>), [Spring Boot 4](<https://devfeed.tech/topics/spring-boot-4.md>), [Orchestration](<https://devfeed.tech/topics/orchestration.md>), [Quarkus](<https://devfeed.tech/topics/quarkus.md>), [elasticsearch](<https://devfeed.tech/topics/elasticsearch.md>), [JSON](<https://devfeed.tech/topics/json.md>), [Compiler](<https://devfeed.tech/topics/compiler.md>), [Scripting](<https://devfeed.tech/topics/scripting.md>), [GUI](<https://devfeed.tech/topics/gui.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [Security](<https://devfeed.tech/topics/security.md>)

Tags: [boot](<https://devfeed.tech/tags/boot.md>), [cryptography](<https://devfeed.tech/tags/cryptography.md>), [gui](<https://devfeed.tech/tags/gui.md>), [intellij](<https://devfeed.tech/tags/intellij.md>), [intellij-idea](<https://devfeed.tech/tags/intellij-idea.md>), [java](<https://devfeed.tech/tags/java.md>), [json](<https://devfeed.tech/tags/json.md>), [metrics](<https://devfeed.tech/tags/metrics.md>), [netflix](<https://devfeed.tech/tags/netflix.md>), [no-ads](<https://devfeed.tech/tags/no-ads.md>), [no-after-post](<https://devfeed.tech/tags/no-after-post.md>), [no-before-post](<https://devfeed.tech/tags/no-before-post.md>), [no-optins](<https://devfeed.tech/tags/no-optins.md>), [orchestration](<https://devfeed.tech/tags/orchestration.md>), [post](<https://devfeed.tech/tags/post.md>), [release](<https://devfeed.tech/tags/release.md>), [scripting](<https://devfeed.tech/tags/scripting.md>), [security](<https://devfeed.tech/tags/security.md>), [weekly-review](<https://devfeed.tech/tags/weekly-review.md>), [weekly-review-no-ads-no-after-post-no-before-post-no-optins](<https://devfeed.tech/tags/weekly-review-no-ads-no-after-post-no-before-post-no-optins.md>)

### AI overview

Java Weekly, Issue 661 is a roundup covering IntelliJ IDEA Conf, the JDK 27 release candidate, early JDK 28 developments, Spring and Java updates, technical articles, webinars, and recent framework and library releases. It also highlights Netflix Conductor's evolution as a workflow orchestration engine.

### Source excerpt

IntelliJ IDEA Conf is back, JDK 27 got its first RC and JDK 28 is already looking solid The post Java Weekly, Issue 661 first appeared on Baeldung.

## HTTP Client SSRF Mitigation with InetAddressFilter in Spring Boot

DevFeed: [HTTP Client SSRF Mitigation with InetAddressFilter in Spring Boot](<https://devfeed.tech/articles/http-client-ssrf-mitigation-with-inetaddressfilter-in-spring-boot-4503.md>)

Original publisher: [Read original article](<https://www.baeldung.com/spring-boot-http-client-ssrf-mitigation-inetaddressfilter>)

Author: Hamid Reza Sharifi

Published: 2026-08-22T23:16:19Z

Content type: tutorial

Language: en

Sources: [Baeldung](<https://devfeed.tech/sources/baeldung.md>)

Topics: [Spring Boot 4](<https://devfeed.tech/topics/spring-boot-4.md>), [Vulnerabilities](<https://devfeed.tech/topics/vulnerabilities.md>), [Security](<https://devfeed.tech/topics/security.md>), [client](<https://devfeed.tech/topics/client.md>)

Tags: [how-to](<https://devfeed.tech/tags/how-to.md>), [http](<https://devfeed.tech/tags/http.md>), [security](<https://devfeed.tech/tags/security.md>), [spring](<https://devfeed.tech/tags/spring.md>), [spring-boot](<https://devfeed.tech/tags/spring-boot.md>), [spring-boot-4](<https://devfeed.tech/tags/spring-boot-4.md>), [spring-boot-spring-boot-4](<https://devfeed.tech/tags/spring-boot-spring-boot-4.md>), [tutorial](<https://devfeed.tech/tags/tutorial.md>), [vulnerability](<https://devfeed.tech/tags/vulnerability.md>)

### AI overview

A tutorial on mitigating Server-Side Request Forgery (SSRF) in Spring Boot applications with InetAddressFilter. It explains how filtering resolved IP addresses can prevent HTTP clients from reaching unintended internal, loopback, or cloud metadata destinations, and introduces built-in filters and composable allowlist and blocklist rules.

### Source excerpt

Learn how to use the InetAddressFilter class in a Spring-based application to limit the address that an HTTP client can call. The post HTTP Client SSRF Mitigation with InetAddressFilter in Spring Boot first appeared on Baeldung.

## Eliminating Java cold starts with AWS Lambda Managed Instances

DevFeed: [Eliminating Java cold starts with AWS Lambda Managed Instances](<https://devfeed.tech/articles/eliminating-java-cold-starts-with-aws-lambda-managed-instances-4663.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/compute/eliminating-java-cold-starts-with-aws-lambda-managed-instances/>)

Author: Jay Colodner

Published: 2026-07-13T20:23:19Z

Content type: article

Language: en

Sources: [AWS Compute Blog](<https://devfeed.tech/sources/aws-compute-blog.md>)

Topics: [AWS Lambda](<https://devfeed.tech/topics/aws-lambda.md>), [benchmarking](<https://devfeed.tech/topics/benchmarking.md>), [Amazon Web Services](<https://devfeed.tech/topics/aws.md>), [Amazon EC2](<https://devfeed.tech/topics/amazon-ec2.md>), [Spring Boot 4](<https://devfeed.tech/topics/spring-boot-4.md>), [cpu](<https://devfeed.tech/topics/cpu.md>), [SDKs](<https://devfeed.tech/topics/sdks.md>)

Tags: [aws](<https://devfeed.tech/tags/aws.md>), [aws-lambda](<https://devfeed.tech/tags/aws-lambda.md>), [benchmark](<https://devfeed.tech/tags/benchmark.md>), [benchmarking](<https://devfeed.tech/tags/benchmarking.md>), [benchmarks](<https://devfeed.tech/tags/benchmarks.md>), [comparison](<https://devfeed.tech/tags/comparison.md>), [cpu](<https://devfeed.tech/tags/cpu.md>), [deployment](<https://devfeed.tech/tags/deployment.md>), [java](<https://devfeed.tech/tags/java.md>), [jit](<https://devfeed.tech/tags/jit.md>), [latency](<https://devfeed.tech/tags/latency.md>), [on-call](<https://devfeed.tech/tags/on-call.md>), [performance](<https://devfeed.tech/tags/performance.md>), [spring-boot-4](<https://devfeed.tech/tags/spring-boot-4.md>), [uncategorized](<https://devfeed.tech/tags/uncategorized.md>)

### AI overview

This article benchmarks four Java deployment modes for AWS Lambda: Standard Lambda, SnapStart, GraalVM Native Image, and Lambda Managed Instances. Using identical Spring Boot applications across CPU-bound, I/O-plus-computation, and I/O-bound workloads, it reports that Managed Instances preserve JVM state and enable JIT optimization, improving median and tail latency while reducing cold-start spikes.

### Source excerpt

A single cold start can push your Java Lambda function's response time from milliseconds to seconds, enough to violate your p99 SLA, timeout a downstream service, and page your on-call. The Java Virtual Machine (JVM) performs best in long-running processes. Its Just-In-Time (JIT) compiler progressively optimizes code over thousands of invocations. Standard serverless execution environments [...]