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Process/memory leaks: orphaned processes and zombie subagents #101

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opened 2026-01-22 21:56:59 +00:00 by jack · 2 comments

jack commented

2026-01-22 21:56:59 +00:00

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Origin

Upstream issues #701, #737, #740

Problem

Multiple related issues causing memory and process accumulation:

Orphaned claude processes (#701): 209+ orphaned processes consuming 2.5-3.5GB RAM
Zombie subagents (#737): Worker spawns subagents that don't terminate
Orphaned active sessions (#740): Sessions stuck in 'active' state block pending queue

Symptoms

RAM usage grows continuously
Many orphaned claude processes visible in task manager
Pending message queue gets blocked
System becomes sluggish over time

Expected Behavior

Subagents terminate when parent completes
Sessions properly transition to completed state
No orphaned processes accumulate
Stable memory usage

See CLAUDE.md cleanup command: pkill -f "claude.*--resume"
Worker restart: pkill -f "worker-service.cjs --daemon"

## Origin Upstream issues #701, #737, #740 ## Problem Multiple related issues causing memory and process accumulation: 1. **Orphaned claude processes** (#701): 209+ orphaned processes consuming 2.5-3.5GB RAM 2. **Zombie subagents** (#737): Worker spawns subagents that don't terminate 3. **Orphaned active sessions** (#740): Sessions stuck in 'active' state block pending queue ## Symptoms - RAM usage grows continuously - Many orphaned `claude` processes visible in task manager - Pending message queue gets blocked - System becomes sluggish over time ## Expected Behavior - Subagents terminate when parent completes - Sessions properly transition to completed state - No orphaned processes accumulate - Stable memory usage ## Related - See CLAUDE.md cleanup command: `pkill -f "claude.*--resume"` - Worker restart: `pkill -f "worker-service.cjs --daemon"`

jack added the

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2026-01-22 21:57:00 +00:00

jack referenced this issue

2026-01-22 22:18:54 +00:00

feat: Endless Mode - Real-time context compression for extended sessions #109

jonas.hanisch referenced this issue from a commit

2026-01-23 16:50:22 +00:00

fix: stop hook now properly marks session as completed

jack commented

2026-01-23 16:50:33 +00:00

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Owner

Partial Fix: Orphaned Active Sessions

Found and fixed a bug in the stop hook:

Problem: The stop hook was calling /api/hooks/summarize which only queued summarization but did NOT mark the session as completed. Sessions stayed in 'active' state indefinitely.

Fix: Changed to call /api/hooks/session/end which:

Marks session as 'completed'
Queues summarization
Broadcasts session:ended SSE event

Commit: d995106

Remaining issues (Claude Code bugs, not claude-mem):

Orphaned claude processes - This is a known Claude Code bug with subagents not terminating. Workaround: pkill -f "claude.*--resume"
Zombie subagents - Also a Claude Code issue. Related: https://github.com/anthropics/claude-code/issues/19045

These are upstream Claude Code bugs and cannot be fixed in claude-mem.

## Partial Fix: Orphaned Active Sessions Found and fixed a bug in the stop hook: **Problem:** The stop hook was calling `/api/hooks/summarize` which only queued summarization but did NOT mark the session as completed. Sessions stayed in 'active' state indefinitely. **Fix:** Changed to call `/api/hooks/session/end` which: - Marks session as 'completed' - Queues summarization - Broadcasts session:ended SSE event Commit: d995106 --- **Remaining issues (Claude Code bugs, not claude-mem):** 1. **Orphaned claude processes** - This is a known Claude Code bug with subagents not terminating. Workaround: `pkill -f "claude.*--resume"` 2. **Zombie subagents** - Also a Claude Code issue. Related: https://github.com/anthropics/claude-code/issues/19045 These are upstream Claude Code bugs and cannot be fixed in claude-mem.

jack commented

2026-01-24 09:35:08 +00:00

Author

Owner

Status Update:

This is an upstream Claude Code issue, not a claude-mem plugin bug. The referenced issues (#701, #737, #740) are in the Claude Code repository itself.

Current Mitigations:

CLAUDE.md documents the pkill -f "claude.*--resume" cleanup command
Worker restart documented: pkill -f "worker-service.cjs --daemon"

Plugin-side improvements possible:

✅ Worker termination queuing (PR #121) - ensures workers finish tasks before termination
Add periodic cleanup hook to kill orphaned processes automatically
Add memory monitoring to Dashboard to alert users

The core fix must come from Anthropic's Claude Code team. Keeping this issue open to track any plugin-side mitigations we can implement.

**Status Update:** This is an upstream Claude Code issue, not a claude-mem plugin bug. The referenced issues (#701, #737, #740) are in the Claude Code repository itself. **Current Mitigations:** - CLAUDE.md documents the `pkill -f "claude.*--resume"` cleanup command - Worker restart documented: `pkill -f "worker-service.cjs --daemon"` **Plugin-side improvements possible:** 1. ✅ Worker termination queuing (PR #121) - ensures workers finish tasks before termination 2. Add periodic cleanup hook to kill orphaned processes automatically 3. Add memory monitoring to Dashboard to alert users The core fix must come from Anthropic's Claude Code team. Keeping this issue open to track any plugin-side mitigations we can implement.

jonas.hanisch referenced this issue from a commit

2026-01-24 21:50:01 +00:00

fix(cleanup): implement process/memory leak prevention (#101)

jonas.hanisch closed this issue

2026-01-24 21:50:36 +00:00

jonas.hanisch referenced this issue from a commit

2026-01-25 20:16:49 +00:00

docs: update README with current database schema and features (Issue #255)