少於1分鐘 | 最後修改: 0001-01-01, 0:00:00 am

Analyzer lj-lua-ngx-print-error

Name

lj-lua-ngx-print-error - ngx.print and ngx.say error Flame Graph

This analyzer profiles errors occurring in ngx.print and ngx.say operations within OpenResty and Kong applications. It captures stack traces when output functions fail, typically due to broken client connections or buffer issues. The analyzer generates flame graphs showing error distribution across code paths, helping identify problematic response generation patterns and improve error handling in output operations.

Resource Category

Error.

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-print-error -p PID

# trace a shell command directly
orxray analyzer run lj-lua-ngx-print-error -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-print-error -p -PGID

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

Tracing Multiple Processes

Supported.

Output Formats

  • Flame Graphs

Author

The OpenResty Inc. Team.

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