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openclaw - 💡(How to fix) Fix [Bug] Discord interaction handler AbortError floods log when event loop is saturated — no user-facing recovery [2 comments, 2 participants]

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openclaw/openclaw#77716•Fetched 2026-05-06 06:22:34
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clawsweeper[bot]clawsweeper[bot]slideshow-dingoslideshow-dingo
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commented ×2cross-referenced ×1

Error Message

2026-05-05T15:31:11 [WARN] liveness warning: reasons=event_loop_delay,event_loop_utilization,cpu interval=30s eventLoopDelayP99Ms=6530.5 eventLoopDelayMaxMs=6555.7 eventLoopUtilization=0.967 cpuCoreRatio=1.053 active=1 waiting=0 2026-05-05T15:31:17 [ERROR] discord interaction handler failed: AbortError: This operation was aborted

Root Cause

The Discord interaction handler has an internal timeout (observed: ~6s between liveness warning and AbortError). When ELD is 6500ms+, the handler's work queue cannot drain within that window, causing the AbortError. The error is caught and logged, but no fallback reply is sent to the Discord channel.

This is related to but distinct from: #69249 (gateway restart aborts) and #71127 (stuck sessions never aborted).

Code Example

2026-05-05T15:31:11 [WARN] liveness warning: reasons=event_loop_delay,event_loop_utilization,cpu interval=30s eventLoopDelayP99Ms=6530.5 eventLoopDelayMaxMs=6555.7 eventLoopUtilization=0.967 cpuCoreRatio=1.053 active=1 waiting=0
2026-05-05T15:31:17 [ERROR] discord interaction handler failed: AbortError: This operation was aborted

---

// After catching AbortError in interaction handler
await sendChannelMessage(channelId, "I'm experiencing high load right now. Your command was received — please give me a moment and try again.");
// Then log and proceed
RAW_BUFFERClick to expand / collapse

Bug Summary

When a Discord slash command (e.g. /new) is issued while the Node.js event loop is saturated (>95% utilization), the Discord interaction handler hits an internal timeout and emits AbortError: This operation was aborted with no user-facing recovery message posted to the channel. The user's turn is silently dropped.

Environment

  • OpenClaw: 2026.5.3-1
  • Node.js: 22.22.2 (Linux)
  • Channel: Discord
  • Surface: guild text channel

Steps to Reproduce

  1. Have the gateway under heavy load (parallel subagent spawns, compaction, Honcho hook failures)
  2. EL utilization climbs to >95% (P99 ELD 6000ms+)
  3. Issue /new command in Discord channel
  4. Observe in gateway log: [discord] interaction handler failed: AbortError: This operation was aborted
  5. No message appears in Discord — the user gets no feedback that their command was received

Observed Log

2026-05-05T15:31:11 [WARN] liveness warning: reasons=event_loop_delay,event_loop_utilization,cpu interval=30s eventLoopDelayP99Ms=6530.5 eventLoopDelayMaxMs=6555.7 eventLoopUtilization=0.967 cpuCoreRatio=1.053 active=1 waiting=0
2026-05-05T15:31:17 [ERROR] discord interaction handler failed: AbortError: This operation was aborted

Root Cause Analysis

The Discord interaction handler has an internal timeout (observed: ~6s between liveness warning and AbortError). When ELD is 6500ms+, the handler's work queue cannot drain within that window, causing the AbortError. The error is caught and logged, but no fallback reply is sent to the Discord channel.

This is related to but distinct from: #69249 (gateway restart aborts) and #71127 (stuck sessions never aborted).

Expected Behavior

When the interaction handler catches an AbortError, it should either:

  1. Post a user-visible message to the channel: "Your command was received but I couldn't process it due to high load. Please try again in a moment."
  2. Queue the command for retry once the EL recovers
  3. Both

Impact

  • User trust erosion: command appears to be ignored
  • Debugging difficulty: no channel feedback means users don't know their command was received
  • Distinguishability: hard to tell apart from a dead bot vs. a saturated bot

Suggested Fix

In the Discord plugin interaction handler error path, add a channel-safe fallback reply before re-throwing or logging:

// After catching AbortError in interaction handler
await sendChannelMessage(channelId, "I'm experiencing high load right now. Your command was received — please give me a moment and try again.");
// Then log and proceed

A more robust fix would be a general channelHealthCheck that marks channels as degraded when EL is saturated and routes fallback messages accordingly.

Internal Reference

  • Handler timeout: appears to be ~6s from liveness warning to abort
  • Error string: AbortError: This operation was aborted
  • Log location: subsystem-DmUr_Z7J.js:150

extent analysis

TL;DR

Implement a fallback reply in the Discord interaction handler error path to notify users when the bot is experiencing high load.

Guidance

  • Add a try-catch block around the interaction handler code to catch the AbortError and send a channel-safe fallback reply before re-throwing or logging.
  • Consider implementing a channelHealthCheck to mark channels as degraded when the event loop is saturated and route fallback messages accordingly.
  • Verify that the fallback reply is sent successfully by checking the Discord channel for the expected message.
  • Review the event loop utilization and adjust the threshold for sending fallback replies as needed.

Example

try {
  // interaction handler code
} catch (error) {
  if (error instanceof AbortError) {
    await sendChannelMessage(channelId, "I'm experiencing high load right now. Your command was received — please give me a moment and try again.");
  }
  // log and proceed
}

Notes

The suggested fix assumes that the sendChannelMessage function is available and properly configured. Additionally, the channelHealthCheck implementation may require additional development and testing.

Recommendation

Apply the workaround by adding a fallback reply in the Discord interaction handler error path, as it provides a immediate solution to the user trust erosion and debugging difficulty issues.

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