OutOfMemory | BestHub

vivo Internet Technology

Apr 24, 2024 · Big Data

Analysis and Resolution of a FileSystem‑Induced Memory Leak Causing OOM in Production

The article details how repeatedly calling FileSystem.get(uri, conf, user) created distinct UserGroupInformation objects, inflating the static FileSystem cache and causing a heap‑memory leak that triggered an Out‑Of‑Memory error, and explains that using the two‑argument get method or explicitly closing instances resolves the issue.

FilesystemHadoopJava

0 likes · 13 min read

Analysis and Resolution of a FileSystem‑Induced Memory Leak Causing OOM in Production

Selected Java Interview Questions

Mar 26, 2024 · Backend Development

Resolving Java OOM Caused by Large File Download: GC Log Analysis and Streaming Solutions

The article describes a production OOM incident caused by downloading a 2.4 GB file, walks through GC log and heap‑dump analysis using MAT, identifies the problematic use of FileUtils.readFileToByteArray, and presents streaming and external storage solutions to prevent memory exhaustion.

FileDownloadGCJava

0 likes · 6 min read

Resolving Java OOM Caused by Large File Download: GC Log Analysis and Streaming Solutions

Selected Java Interview Questions

Sep 4, 2022 · Backend Development

Resolving OutOfMemory Errors When Using Apache POI for Large Excel Exports

This article analyzes why Apache POI runs out of memory when writing hundreds of thousands of rows to an Excel file, examines the underlying HSSFWorkbook implementation, and demonstrates how switching to the streaming SXSSFWorkbook API provides a stable, low‑memory solution for large‑scale Excel generation.

Apache POIExcelJava

0 likes · 6 min read

Resolving OutOfMemory Errors When Using Apache POI for Large Excel Exports

Selected Java Interview Questions

Aug 1, 2022 · Backend Development

Root Cause Analysis of a Backend Out‑Of‑Memory Incident and Proper Use of ExecutorCompletionService

The article analyzes a production outage caused by misuse of ExecutorCompletionService, explains why missing take/poll leads to memory leaks, demonstrates correct and incorrect Java code examples, compares ExecutorService with ExecutorCompletionService, and provides practical guidelines to avoid similar OOM problems in backend services.

ExecutorCompletionServiceJavaOutOfMemory

0 likes · 11 min read

Root Cause Analysis of a Backend Out‑Of‑Memory Incident and Proper Use of ExecutorCompletionService

GuanYuan Data Tech Team

Jun 30, 2022 · Big Data

Why Spark 3.2 OOMs After Upgrade: Deep Dive into AQE and StageMetrics

After upgrading Spark from 3.0.1 to 3.2.1 an ETL job began failing with OutOfMemory errors; this article examines the root causes, including AQE‑related metric accumulation, skipped stages, and stage‑metric growth, and presents a debugging process and a code‑level fix to mitigate memory pressure.

AQEBig DataOutOfMemory

0 likes · 13 min read

Why Spark 3.2 OOMs After Upgrade: Deep Dive into AQE and StageMetrics

360 Quality & Efficiency

Dec 31, 2021 · Backend Development

Understanding and Troubleshooting Out‑of‑Memory Issues in Java Applications

This article explains the causes of Java out‑of‑memory problems, introduces essential diagnostic commands and memory‑analysis tools, and walks through a real‑world case study that shows how to locate, analyze, and fix a memory leak caused by unreleased OSS client connections.

JVMJavaMemoryLeak

0 likes · 7 min read

Understanding and Troubleshooting Out‑of‑Memory Issues in Java Applications