Analyzer lj-lua-socket-close-fgraph

# Name

lj-lua-socket-close-fgraph - Lua-Land close socket Flame Graph

This analyzer profiles socket close operations initiated from Lua-land code in LuaJIT-based applications such as OpenResty, Kong, and APISIX. It captures stack traces when sockets are closed through Lua APIs, generating flame graphs that visualize the call paths leading to socket closure. The analyzer helps identify patterns in connection lifecycle management and troubleshoot issues related to premature or excessive socket closures in Lua code.

# 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-socket-close-fgraph -p PID

# trace a shell command directly
orxray analyzer run lj-lua-socket-close-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-socket-close-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run lj-lua-socket-close-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.