DNS Resolution Delay: the Silent Killer That Blocks Your Threads
Postedabout 2 months agoActiveabout 2 months ago
howtech.substack.comTechstory
calmnegative
Debate
20/100
DNS ResolutionNetworkingPerformance Optimization
Key topics
DNS Resolution
Networking
Performance Optimization
The article discusses how DNS resolution delays can silently block threads, causing performance issues, and a commenter shares a personal experience with JVM DNS cache causing a similar problem.
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- 01Story posted
Nov 14, 2025 at 6:23 PM EST
about 2 months ago
Step 01 - 02First comment
Nov 14, 2025 at 6:58 PM EST
35m after posting
Step 02 - 03Peak activity
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Step 03 - 04Latest activity
Nov 14, 2025 at 6:58 PM EST
about 2 months ago
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Discussion (1 comments)
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icedchai
about 2 months ago
The JVM DNS cache "security decision to prevent rebinding attacks" bit me once. I had changed an IP address for one of my systems. A "vendor" I was working with claimed one of their servers could no longer reach mine. I must have a routing problem on my network. This went on-and-on for a week until I finally talked them through running tcpdump and sending me packet captures, then another week to get them to restart their service...
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ID: 45933354Type: storyLast synced: 11/17/2025, 6:05:26 AM
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