Deploying Apache DolphinScheduler in Standalone Mode
System Requirements and Environment Setup
Before initiating the installation, ansure your host meets the following baseline requirements:
Java Runtime Environment: Version 8 or higher
Relational Database: MySQL 5.7 or later
JDBC Driver: MySQL Connector/J 8.0.16+
1. Configure Java Environment
Obtain the JDK package and deploy it to a standardi ...
Posted on Sat, 04 Jul 2026 17:11:22 +0000 by ingoruberg
Understanding ThreadLocal in JDK 8: Usage, Internals, and Memory Safety
ThreadLocal is a core concurrency utility in Java that enables per-thread variable isolation without synchronization. Unlike shared mutable state, it provides each thread with its own independent copy of a variable—effectively trading memory for thread-safety and performance.
Core Concept and Basic Usage
Each Thread instance maintains an intern ...
Posted on Fri, 15 May 2026 12:26:13 +0000 by raimis100
How ConcurrentHashMap Achieves Thread Safety in JDK 8
Data Structure
The internal structure mirrors HashMap, consisting of a hash table array with linked lists for collision handling. When a bucket accumulates more than eight entries, it transforms into a red-black tree for optimized search performance.
Implementation Approach
JDK 8 leverages synchronized and CAS operations for concurrent access c ...
Posted on Fri, 08 May 2026 01:24:57 +0000 by FRSH