Analyzer lj-lua-ngx-exit-fgraph

# Name

lj-lua-ngx-exit-fgraph - Lua-Land Nginx Request Status Code Flame Graph

This analyzer profiles HTTP request handling in Lua-land code that results in specific status codes within OpenResty and Kong applications. It captures Lua-level stack traces when requests exit with particular HTTP status codes (default: >= 400). The analyzer generates flame graphs visualizing the code paths leading to these status codes, helping identify error-prone request handlers and troubleshoot HTTP error responses.

# Resource Category

Network I/O.

# Application Type & Technical Stack

• OpenResty
• Kong
• APISIX

# Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run lj-lua-ngx-exit-fgraph -p PID

# trace a shell command directly
orxray analyzer run lj-lua-ngx-exit-fgraph -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run lj-lua-ngx-exit-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run lj-lua-ngx-exit-fgraph --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs

# Author

The OpenResty Inc. Team.

# Copyright

Copyright (C) by OpenResty Inc. All rights reserved.