Analyzer openresty-cosocket-err-fgraph

# Name

openresty-cosocket-err-fgraph - OpenResty Cosocket Error Flame Graph

This analyzer profiles cosocket operations that encounter errors in OpenResty-based applications including Kong and APISIX. It captures Lua-land stack traces when cosocket operations fail, generating flame graphs that visualize the execution paths leading to errors. The analyzer is essential for diagnosing network communication failures, identifying error-prone code paths, and understanding the root causes of cosocket-related issues such as timeouts, connection refusals, and protocol errors.

# 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 openresty-cosocket-err-fgraph -p PID

# trace a shell command directly
orxray analyzer run openresty-cosocket-err-fgraph -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run openresty-cosocket-err-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run openresty-cosocket-err-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.