How does Atlas detect a hanging `mvn test` in a Spring project?

Atlas detects a hanging `mvn test` by running it through its `bash` tool, which races the command against a timeout. If the `JUnit 5` test run exceeds this timeout, Atlas terminates it and provides `shell_metadata` indicating whether it was blocked on interactive input or simply took too long to complete.

Can Atlas help with `Spotless` formatting issues in Spring that seem to hang?

Yes, Atlas can diagnose hanging `Spotless` formatting tasks. If `mvn spotless:apply` appears to hang, Atlas's `bash` tool will report if it's waiting for input. You can then re-run the command with non-interactive flags like `--non-interactive` to resolve the blockage, ensuring your Spring code adheres to formatting standards.

What if my Spring build is genuinely slow, not blocked on input?

If Atlas's `shell_metadata` indicates your Spring `Maven` build is genuinely slow rather than blocked, it will instruct you to retry the command with a larger timeout value. For example, you might use `atlas bash --timeout 120000 'mvn clean install'` to allow more time for a complex build.

How does Atlas ensure safety when modifying Spring project files like `pom.xml`?

Atlas ensures safety by using permission-gated tool calls and a read-only plan agent before making any changes. For modifications to Spring project files like `pom.xml` or Java source, Atlas computes a unified diff for your approval and snapshots file changes as git patches, allowing for easy review and rollback.

Can Atlas diagnose issues with Spring Boot application startup commands?

Yes, Atlas can diagnose issues with Spring Boot application startup commands, such as `mvn spring-boot:run` or `java -jar myapp.jar`. By running these through `atlas bash`, you can determine if the application is hanging due to a configuration issue requiring input or if it's genuinely taking a long time to initialize, receiving clear diagnostic feedback.

What happens if I manually stop a long-running Spring command in Atlas?

If you manually stop a long-running Spring command, such as a `Maven` build, within Atlas, the `shell_metadata` block in the output will explicitly state 'User aborted the command'. This clear message helps you distinguish your intentional interrupt from a timeout imposed by Atlas or a command blocked on input.

Diagnose a hanging or long-running command in Spring with Atlas in 2026

Atlas helps Spring developers in 2026 diagnose whether a `Maven` build, `JUnit 5 via mvn test` run, or `Spotless` formatting task is genuinely slow or silently blocked on interactive input, providing clear steps to get it unstuck. By running commands through Atlas's `bash` tool, you receive explicit feedback on timeouts or input waits, streamlining your development workflow.

How Atlas Diagnoses Hanging Commands in a Spring Codebase

Atlas's `bash` tool, a core feature since its initial release, provides a robust mechanism for diagnosing hanging commands in Spring projects by racing every execution against a configurable timeout. This capability is crucial for identifying whether a `Maven` build or a `JUnit 5` test run is genuinely slow or silently awaiting interactive input.

When you execute a Spring-related command, such as `mvn clean install` or `mvn test` for `JUnit 5` tests, through Atlas's `bash` tool, Atlas monitors its execution time. If the command exceeds a predefined timeout, Atlas terminates it and provides a detailed `shell_metadata` block in the output. This metadata explicitly states whether the command was killed due to a timeout or, more importantly, if it was blocked on interactive input. This distinction is vital for Spring developers, as a command blocked on input will never resolve itself by simply waiting longer. Atlas's ability to index code by AST declarations using tree-sitter and search with hybrid semantic and keyword retrieval helps it understand the context of your Spring project, making its diagnostic messages highly relevant to your `pom.xml` configuration or Java source files.

Concrete Spring Commands and Files Involved in Diagnosis

Diagnosing a hanging `Maven` build or `Spotless` formatting task in a Spring project involves specific commands and configuration files, such as `pom.xml`, which Atlas understands deeply. In 2026, Atlas helps you interact with these tools effectively, providing actionable insights into their behavior.

To diagnose a hanging command in a Spring project, you would typically run it through Atlas's `bash` tool. For instance, to check a `JUnit 5` test run, you might execute `atlas bash 'mvn test'`. If this command hangs, Atlas's `shell_metadata` output will indicate if it was blocked on input. This is particularly useful for `Maven` commands that might prompt for confirmation or `Spotless` formatting tasks that could be waiting for user interaction. If the diagnosis points to interactive input, you would re-run the command with non-interactive flags, such as `atlas bash 'mvn test -B'` (for batch mode) or `atlas bash 'mvn spotless:apply --non-interactive'`. Atlas's understanding of your Spring Boot project, including its `pom.xml` and `application.properties` files, allows it to suggest appropriate flags or modifications, ensuring you're not guessing at solutions. Atlas's ability to read git branches, status, and diffs also provides context for any changes that might have introduced the hanging behavior.

Review and Safety Mechanisms for Spring Code Changes with Atlas

Atlas incorporates multiple robust safety mechanisms, including permission-gated tool calls and unified diffs, ensuring that any proposed changes to your Spring codebase, such as modifications to `pom.xml` or Java source files, are thoroughly reviewed and approved. This process minimizes risks for developers in 2026.

When Atlas suggests a fix for a hanging Spring command, such as modifying a `pom.xml` to adjust a `Maven` plugin configuration or adding a non-interactive flag to a script, every tool call is permission-gated against allow, ask, and deny rules. Before any changes are applied, Atlas drafts a plan in a read-only plan agent and asks for your approval. Once a plan is approved, Atlas computes a unified diff for every file edit, surfacing it for your review and explicit approval before writing. This means you can see exactly what changes Atlas proposes to your Spring controllers, beans, or build scripts. Furthermore, Atlas snapshots file changes as git patches, allowing edits to be easily diffed and rolled back if necessary. This comprehensive review process ensures that your Spring project's integrity is maintained, and you retain full control over all modifications, whether they involve `JUnit 5` tests or `Spotless` configurations.

Step by step

01Run your Spring command, such as `mvn test` for `JUnit 5` or `mvn clean install` for `Maven`, through Atlas's `bash` tool: `atlas bash 'mvn test'`.
02Examine the `shell_metadata` block in Atlas's output when the command is killed. Atlas explicitly calls out if the command was blocked on interactive input or if it simply timed out.
03If the `shell_metadata` indicates the command was blocked on input, re-run it with non-interactive flags. For `Maven`, use `atlas bash 'mvn clean install -B'`. For `Spotless`, try `atlas bash 'mvn spotless:apply --non-interactive'`.
04If the command was genuinely slow and not blocked, retry it with a larger timeout value. Atlas's message will instruct you on how to increase the timeout in milliseconds, for example: `atlas bash --timeout 60000 'mvn test'`.
05If you manually aborted the command, the `shell_metadata` will clearly state 'User aborted the command', distinguishing your interrupt from an Atlas-imposed timeout.

Frequently asked questions

How does Atlas detect a hanging `mvn test` in a Spring project?: Atlas detects a hanging `mvn test` by running it through its `bash` tool, which races the command against a timeout. If the `JUnit 5` test run exceeds this timeout, Atlas terminates it and provides `shell_metadata` indicating whether it was blocked on interactive input or simply took too long to complete.
Can Atlas help with `Spotless` formatting issues in Spring that seem to hang?: Yes, Atlas can diagnose hanging `Spotless` formatting tasks. If `mvn spotless:apply` appears to hang, Atlas's `bash` tool will report if it's waiting for input. You can then re-run the command with non-interactive flags like `--non-interactive` to resolve the blockage, ensuring your Spring code adheres to formatting standards.
What if my Spring build is genuinely slow, not blocked on input?: If Atlas's `shell_metadata` indicates your Spring `Maven` build is genuinely slow rather than blocked, it will instruct you to retry the command with a larger timeout value. For example, you might use `atlas bash --timeout 120000 'mvn clean install'` to allow more time for a complex build.
How does Atlas ensure safety when modifying Spring project files like `pom.xml`?: Atlas ensures safety by using permission-gated tool calls and a read-only plan agent before making any changes. For modifications to Spring project files like `pom.xml` or Java source, Atlas computes a unified diff for your approval and snapshots file changes as git patches, allowing for easy review and rollback.
Can Atlas diagnose issues with Spring Boot application startup commands?: Yes, Atlas can diagnose issues with Spring Boot application startup commands, such as `mvn spring-boot:run` or `java -jar myapp.jar`. By running these through `atlas bash`, you can determine if the application is hanging due to a configuration issue requiring input or if it's genuinely taking a long time to initialize, receiving clear diagnostic feedback.
What happens if I manually stop a long-running Spring command in Atlas?: If you manually stop a long-running Spring command, such as a `Maven` build, within Atlas, the `shell_metadata` block in the output will explicitly state 'User aborted the command'. This clear message helps you distinguish your intentional interrupt from a timeout imposed by Atlas or a command blocked on input.

Try Atlas in your terminal

The terminal-native AI coding agent. Free core, single binary.

Install Atlas

Related guides

Diagnose a Hanging or Long-Running Command with Atlas in 2026

How to diagnose a hanging command with Atlas in 2026: the bash tool races every command against a timeout and tells you whether it is slow or blocked on input.

Atlas for Spring in 2026

Atlas, the terminal native AI coding agent, empowers Spring developers in 2026 with intelligent code assistance, secure local embeddings, and transparent review processes for enhanced productivity.

Onboard to an Unfamiliar Spring Codebase in 2026 with Atlas

Quickly build a mental model of any Spring Boot repository in 2026 using Atlas. Leverage semantic search, understand Maven builds, and navigate controllers and services with terminal-native AI.

Plan a Multi-File Change Before Editing in Spring with Atlas in 2026

Design and review complex, multi-file changes in your Spring Boot project using Atlas's read-only plan agent, ensuring safety and precision before any code is modified. Leverage real Spring tools like Maven and JUnit 5.

Self-review your working diff before committing in Spring with Atlas in 2026

Catch your own mistakes in Spring Boot projects before committing. Atlas helps Spring developers in 2026 self-review uncommitted diffs, run JUnit 5 via mvn test, and check Spotless formatting.

Locate Where a Behavior is Implemented in Spring with Atlas in 2026

Discover how Atlas, the terminal-native AI coding agent, helps Spring developers in 2026 pinpoint exact file and symbol implementations for behaviors, leveraging Maven, JUnit 5, and Spotless.

Run the Test Suite and Triage Failures in Spring with Atlas in 2026

Streamline Spring test triage in 2026 with Atlas. Turn JUnit 5 via Maven test output into prioritized root causes, leveraging Atlas's AI for efficient debugging.

Run Atlas Headless in CI for Spring Projects in 2026

Automate Spring Boot development in 2026 CI pipelines with Atlas. Run Atlas headless to generate machine-readable output for JUnit 5 tests, Maven builds, and Spotless formatting.

Browse this resource hub