What technical issues and weaknesses of JVM as a platform would you highlight?

Main technical issues and weaknesses of JVM:

• Memory consumption: JVM typically requires more memory compared to native applications, which can be critical for resource-constrained systems.

• Startup time: JVM applications start slower due to the need to load and initialize the virtual machine.

• Configuration and optimization complexity: Achieving maximum performance often requires fine-tuning JVM parameters (e.g., garbage collector), which demands deep knowledge.

• Memory management issues: Although the garbage collector simplifies memory management, it can cause pauses (stop-the-world), affecting real-time performance.

• Version compatibility: Sometimes there are issues with backward compatibility between different JVM versions and libraries.

• Lack of control over low-level resources: Unlike native languages, JVM restricts access to system resources, which can be a disadvantage for some applications.

• Security: Despite built-in security mechanisms, vulnerabilities in JVM or libraries can lead to problems.

Example: In high-load systems, garbage collector pauses can cause delays in request processing, requiring specialized collectors or JVM tuning.