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Spring Batch for Excel reports without timeouts

https://sudonull.com/spring-batch-for-excel-reports-without-timeouts

Learn how Spring Batch solves the generation of hundreds of Excel files asynchronously. Step architecture, progress, code examples. Scale reports without blocking — read the guide for Java developers.

Sound regression snd_hda_intel: PCI rescan fix

https://sudonull.com/sound-regression-snd-hda-intel-pci-rescan-fix

Breakdown of CORB reset timeout (0xFFFF) in snd_hda_intel on Intel HDA. Sysfs rescan solves the problem on legacy hardware. Diagnostics, scripts, automation for Linux devs.

10 config management errors in production

https://sudonull.com/10-config-management-errors-in-production

Learn 10 real application configuration management errors: hardcoded timeouts, lack of validation, zombie flags. For middle/senior dev. Avoid incidents in prod.

Proxy balancing for n8n in Docker: fixing DNS errors

https://sudonull.com/proxy-balancing-for-n8n-in-docker-fixing-dns-errors

Step-by-step setup of fault-tolerant 3proxy for n8n in Docker. Fixing DNS timeouts and access errors. Ready docker-compose and config.

QR Ticket Validation Design for Cinemas

https://sudonull.com/qr-ticket-validation-design-for-cinemas

Breakdown of System Design for QR Ticket Validation: offline signature, idempotency, atomic updates. Solving timeouts and HoL blocking for high-load. Practical SQL examples.

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