Core-Dump · OpenResty Official Blog

Core-Dump

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 11 mins read

Nginx Core Dump Analysis: Catch a Worker Process Crash at the First Scene

case-study openresty-xray undo core-dump memory nginx

The Case: Frequent Nginx Worker Process Crashes No Log Could Explain
Analyzing the Recording: Replaying the Crash Back to the First Scene
Root Cause: A Use-After-Free in Nginx’s Connection Lifecycle
Frequently Asked Questions

The Case: Frequent Nginx Worker Process Crashes No Log Could Explain
Analyzing the Recording: Replaying the Crash Back to the First Scene
Root Cause: A Use-After-Free in Nginx’s Connection Lifecycle
Frequently Asked Questions

OpenResty XRay Aug 28, 2026

OpenResty XRay Updated Aug 28, 2026 7 mins read

Automatic Core Dump Analysis (using OpenResty XRay)

openresty-xray core-dump lua-backtrace luajit dynamic-tracing ebpf

Locate the core dump file from a crashed OpenResty/Nginx worker
Start automatic (guided) core dump analysis in OpenResty XRay
Read the signal, CPU registers, and C backtrace of the crash
Follow the Lua backtrace to the exact crashing line
Automatic Insights reports for online core dumps

Locate the core dump file from a crashed OpenResty/Nginx worker
Start automatic (guided) core dump analysis in OpenResty XRay
Read the signal, CPU registers, and C backtrace of the crash
Follow the Lua backtrace to the exact crashing line
Automatic Insights reports for online core dumps

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