How to Recompile JSP in AEM

In Adobe Experience Manager (AEM), JavaServer Pages (JSP) are a critical part of the templating system that allows for the dynamic creation of HTML content. Over time, as changes are made to JSP files, they need to be recompiled to reflect updates in the running system. This article will guide you through the process of recompiling JSP files in AEM.

Key Takeaways

  • Recompiling JSP is necessary when changes to JSP files are made.
  • JSP recompilation in AEM can be triggered manually or automatically.
  • Understanding AEM’s JSP recompilation process helps in troubleshooting issues.
  • Specific tools and paths in AEM are used to manage JSP recompilation.
  • Backing up JSP scripts before recompilation is a good practice.
  • Monitoring system performance post-recompilation can catch potential issues early.
  • Access control and permissions are important when performing recompilation tasks.

Understanding JSP in AEM

The Role of JSP in Dynamic Content Rendering

JSP files in AEM act as templates, which when compiled, generate content dynamically by injecting data into HTML structures. Recompiling JSPs is akin to updating the blueprint for how the content should be presented.

When to Recompile JSP

Identifying the Need for Recompilation

JSP files should be recompiled when:

  • You have made changes to a JSP file.
  • A new component that includes JSP files is installed.
  • After an AEM upgrade that affects JSP files.

Steps to Recompile JSP in AEM

The Recompilation Process

To recompile JSP files in AEM, follow these steps:

  1. Identify the JSP files that need recompilation.
  2. Navigate to the appropriate directory in CRXDE Lite.
  3. Trigger the recompilation process.
  4. Verify that the JSP files have been recompiled successfully.

Using AEM Tools for JSP Recompilation

Tools and Paths for Management

AEM provides tools like CRXDE Lite and the system console to manage JSPs:

  • CRXDE Lite is used for code edits and manual recompilation.
  • The OSGi Web Console allows for bundle management, where JSP recompilation can be triggered.

Best Practices Before Recompilation

Preparing for a Smooth Update

Before recompiling JSP files, it’s recommended to:

  • Backup the JSP scripts and related content.
  • Validate the syntax and logic of the updated JSP files.
  • Ensure that the system is in a stable state to avoid service disruption.

Monitoring Performance Post-Recompilation

Ensuring System Stability

After recompiling JSP files, monitor:

  • The AEM instance’s response time.
  • Error logs for potential issues.
  • Component functionality to ensure changes are reflected.

Security and Access Control

Recompilation with Caution

Only users with the appropriate permissions should perform JSP recompilation. This ensures that unauthorized changes are not propagated through the system.

Troubleshooting Recompilation Issues

Addressing Common Complications

If issues arise during the recompilation process:

  • Check for compilation errors in the error logs.
  • Validate that the OSGi bundles are active and in good health.
  • If necessary, revert to backup files and attempt recompilation again.


Recompiling JSP files in AEM is a crucial maintenance task that ensures updates to web components are reflected in the live environment. By following the outlined steps and best practices, AEM administrators and developers can manage this process effectively, maintaining the integrity and performance of the AEM instance. Remember, with great power to change content dynamically comes the responsibility to maintain and manage these changes carefully.

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