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RHRohan Hazarirohanh.hashnode.devMay 23 · 6 min read

From In-Memory Processing to Streaming: Resolving Memory Exceptions and Performance Trade-offs

I recently had to fix a production issue where our server was throwing an Out-of-Memory (OOM) exception while generating a report. I refactored it to use streaming, and seeing how well it turned out,

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EJEJ Jungejjung.hashnode.devMar 3 · 2 min read

Stack vs Heap

0. Introduction Understanding the difference between Stack and Heap memory is one of the most fundamental concepts in Java. In this article, we will explore how Stack and Heap work, and the difference

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JKJaswanth Katukurithe-curious-jvm.hashnode.devFeb 14 · 4 min read

Inside the Mind of the JVM

Understanding JVM memory is one of those topics that appears deceptively simple but is frequently explained with a mixture of intuition and myth. Many developers hear statements like “the heap stores addresses” or “objects contain methods,” which sou...

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JTJill Thornhilljillthornhill.hashnode.devApr 24, 2025 · 4 min read

Handling OutOfMemoryError: Requested Array Size Issues

In Java, there are nine types of Out of Memory errors, each caused by a different issue. When it comes to debugging and solving these errors, we need to tailor our strategy to the particular type of error. In this article, we’ll be concentrating on t...

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JTJill Thornhilljillthornhill.hashnode.devApr 24, 2025 · 3 min read

Resolving OutOfMemoryError: PermGen Space Issues

In this article, we’ll look at the Java error java.lang.outofmemoryerror: PermGen Space Issues. This message is only seen when we’re using Java 7 or earlier. From Java 8 onwards, the Permgen (Permanent Generation) has been replaced by the Metaspace. ...

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JTJill Thornhilljillthornhill.hashnode.devApr 24, 2025 · 4 min read

Debugging OutOfMemoryError: Direct Buffer Memory Leaks

Are you seeing this JVM error: java.lang.outofmemoryerror: direct buffer memory? It’s becoming more and more common as modern applications move towards using direct buffers to enhance application performance. The Spring framework, for instance, recom...

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JTJill Thornhilljillthornhill.hashnode.devApr 18, 2025 · 4 min read

Solving OutOfMemoryError: Native Method Stack Trace Analysis

Out of memory errors in Java are fairly common. Some variations of these, however, are rare. In this article, we’ll take a look at an error message that’s seldom seen: java.lang.OutOfMemoryError: reason stack_trace_with_native_method. This is one of...

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JTJill Thornhilljillthornhill.hashnode.devApr 18, 2025 · 4 min read

Preventing OutOfMemoryError: Container Process Kills

Intermittent errors are the most frustrating problems to deal with in production. This is especially so when an application apparently disappears without trace. Perhaps a service becomes unavailable, or a batch process terminates without completing i...

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VBVishal Barvaliyavishalbarvaliya.hashnode.devSep 18, 2024 · 6 min read

Why Does the "Executor Out of Memory" Error Happen in Apache Spark?

Apache Spark is a tool used to process large amounts of data. It’s fast, scalable, and great for big data tasks. However, sometimes when working with Spark, you might run into a common issue: the "Executor Out of Memory" error. If you've seen this er...

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SVSiddhant Visputealas-a-portfolio.vercel.appJul 23, 2024 · 2 min read

Heap wants some space!

So recently I wanted to perform a memory analysis on a heap dump of whooping 5GB using Eclipse’s Memory Analyzer Tool (MAT). My Eclipse IDE fainted just by the idea of opening up and parsing this gigantic dump file. One of the option here is to incre...