We appreciate Entwinkler.de JavaMagazin for translating and publishing our article 'Simulating and troubleshooting deadlocks in Kotlin' in German. It’s an honor to see our work featured in a print magazine, specifically the December 2022 issue, titled 'Simulation und Fehlerbehebung von Deadlocks in Kotlin'.
This post examines the performance of HashMap, Hashtable, and ConcurrentHashMap through practical examples. It concludes that while HashMap performs best, it lacks thread safety, leading to potential issues. ConcurrentHashMap offers slightly slower performance but is thread-safe, making it a preferable choice for concurrent applications.
ConFoo Montreal is a prominent multi-technology conference for developers, featuring a presentation by Architect Ram Lakshmanan on "16 artifacts to capture when there is a production problem." This session ranks 5th out of 155, highlighting the importance of capturing diagnostic information to effectively troubleshoot production issues.
The Java Virtual Machine (JVM) generates three key artifacts for performance optimization: Garbage Collection (GC) logs, Thread dumps, and Heap dumps. GC logs track memory management events, Thread dumps capture current thread states, and Heap dumps provide snapshots of memory. Each has specific uses in troubleshooting and performance analysis.
The ConFoo.CA Developer Conference, a major event for web developers in Canada, featured 155 presentations from international speakers. Architect Ram Lakshmanan's talk focused on troubleshooting production issues, analyzing data artifacts, and sharing enterprise outage examples. Attendees provided positive feedback on his presentation, highlighting its practical insights and real-world relevance.
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.
You can configure JVM to invoke any script when OutOfMemoryError is thrown. Most of the time,OutOfMemoryError doesn't crash the application
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.