This post discusses an issue experienced while analyzing a heap dump in Eclipse MAT, which crashed due to a missing font. The error, ArrayIndexOutOfBoundsException, was traced to font configuration in Linux. Solutions include installing the missing font, upgrading the JDK, or editing the OS font configuration to set Utopia as default.
A popular SaaS application encountering intermittent slowdowns was analyzed, revealing that a specific thread blocked 134 application threads due to an issue with the Log4j framework. This known bug necessitated an upgrade to Log4j2 to resolve the problem, emphasizing the importance of migrating from unsupported software for improved performance and stability.
The Round Robin load balancing algorithm often fails to evenly distribute traffic, especially when nodes are added. While it sends requests in a sequential order, existing nodes bear the brunt of user load, resulting in unequal processing. Alternatives like the 'Least Connections' algorithm can improve traffic distribution among nodes.
To troubleshoot OutOfMemoryError, follow three steps: capture heap dump using JVM arguments to automate collection when errors occur, restart the application to maintain stability, and diagnose the problem using tools like Eclipse MAT or HeapHero for automated analysis. This approach can streamline the troubleshooting process significantly.
Java.lang.VirtualMachineError occurs when the Java virtual machine faces internal issues or resource limitations. This mechanism prevents application crashes. There are four types: OutOfMemoryError, StackOverflowError, InternalError, and UnknownError, each triggered by specific reasons. Understanding and diagnosing these errors with appropriate tools is essential for solutions.
This article provides a simplified troubleshooting strategy for diagnosing CPU spikes in cloud environments. It outlines a three-step process: identifying high CPU-consuming threads, capturing thread dumps, and analyzing the dumps to trace the problematic lines of code. The example illustrates how a non-terminating loop causes CPU spikes in an application.
To debug Java applications remotely, follow two steps: First, launch the JVM with remote debugging arguments, enabling remote access. Second, configure your IDE, such as Eclipse, to establish a connection with the remote server by entering project and connectivity details. Avoid keeping remote debugging enabled to maintain performance and security.
The blog post explains the StackOverFlowError in JVM, detailing its causes, particularly infinite recursive calls, and providing solutions like fixing code, increasing thread stack size using JVM arguments, and utilizing custom stack sizes for threads. Understanding thread stack mechanics is crucial for effective error management and prevention strategies.
The video explains the workings of a finalizer method, detailing how it can lead to OutOfMemoryError. It offers insights on identifying the root cause when the finalizer thread becomes stuck and provides troubleshooting tips using fastthread.io to resolve these issues effectively.