LogAllThreads()

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Creates detailed thread stack trace logs in JSONL format for performance analysis and debugging.

This function captures stack traces from all running threads at specified intervals for a given duration.

It executes asynchronously, returning immediately after starting the logging process, making it ideal for analyzing specific code segments by initiating logging just before the target code execution.

The output format is JSONL (JSON Lines), where each line represents a separate JSON object containing:

  • Timestamp offset in milliseconds from 1/1/1970 00:00:00 UTC (Unix 0)
  • Complete stack trace of each thread's current location

This data can be used for:

  • Performance bottleneck identification
  • Thread behavior analysis
  • Deadlock detection
  • Resource usage patterns

Introduced: 6.2.0.219

LogAllThreads( path=string, interval=number, duration=number );

Returns: void

Argument Description Default
path
string, required 		edit

Full file path where the log will be written. The file should have a .jsonl extension for proper identification as a JSON Lines format file. The function will create the file if it doesn't exist, or append to it if it does.

Example: /var/log/lucee/thread_analysis.jsonl
interval
number, optional 		edit

The time interval (in milliseconds) between stack trace captures. Lower values provide more detailed analysis but generate larger log files and may impact performance.

Recommended ranges:

  • 1-10ms: Very detailed analysis, higher overhead
  • 10-100ms: Balanced detail and performance
  • 100ms+: Lower detail, minimal performance impact

0
duration
number, optional 		edit

Total duration (in milliseconds) for which the function will collect thread data.

After this period, logging automatically stops.

Common durations:

  • 1000-5000ms: Quick snapshots
  • 10000ms: Standard analysis period
  • 30000ms+: Extended analysis for complex operations

10000

Examples

There are currently no examples for this function 37,426ms WARN No examples for function LogAllThreads

See also