mirror of
https://github.com/affaan-m/everything-claude-code.git
synced 2026-03-30 13:43:26 +08:00
fix: observer memory explosion with throttling, re-entrancy guard, and tail sampling (#536)
Three fixes for the positive feedback loop causing runaway memory usage:
1. SIGUSR1 throttling in observe.sh: Signal observer only every 20
observations (configurable via ECC_OBSERVER_SIGNAL_EVERY_N) instead
of on every tool call. Uses a counter file to track invocations.
2. Re-entrancy guard in observer-loop.sh on_usr1(): ANALYZING flag
prevents parallel Claude analysis processes from spawning when
signals arrive while analysis is already running.
3. Cooldown + tail-based sampling in observer-loop.sh:
- 60s cooldown between analyses (ECC_OBSERVER_ANALYSIS_COOLDOWN)
- Only last 500 lines sent to LLM (ECC_OBSERVER_MAX_ANALYSIS_LINES)
instead of the entire observations file
Closes #521
This commit is contained in:
Affaan Mustafa
@@ -1,11 +1,19 @@
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#!/usr/bin/env bash
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# Continuous Learning v2 - Observer background loop
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#
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# Fix for #521: Added re-entrancy guard, cooldown throttle, and
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# tail-based sampling to prevent memory explosion from runaway
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# parallel Claude analysis processes.
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set +e
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unset CLAUDECODE
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SLEEP_PID=""
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USR1_FIRED=0
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ANALYZING=0
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LAST_ANALYSIS_EPOCH=0
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# Minimum seconds between analyses (prevents rapid re-triggering)
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ANALYSIS_COOLDOWN="${ECC_OBSERVER_ANALYSIS_COOLDOWN:-60}"
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cleanup() {
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[ -n "$SLEEP_PID" ] && kill "$SLEEP_PID" 2>/dev/null
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@@ -44,9 +52,17 @@ analyze_observations() {
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return
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fi
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# Sample recent observations instead of loading the entire file (#521).
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# This prevents multi-MB payloads from being passed to the LLM.
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MAX_ANALYSIS_LINES="${ECC_OBSERVER_MAX_ANALYSIS_LINES:-500}"
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analysis_file="$(mktemp "${TMPDIR:-/tmp}/ecc-observer-analysis.XXXXXX.jsonl")"
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tail -n "$MAX_ANALYSIS_LINES" "$OBSERVATIONS_FILE" > "$analysis_file"
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analysis_count=$(wc -l < "$analysis_file" 2>/dev/null || echo 0)
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echo "[$(date)] Using last $analysis_count of $obs_count observations for analysis" >> "$LOG_FILE"
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prompt_file="$(mktemp "${TMPDIR:-/tmp}/ecc-observer-prompt.XXXXXX")"
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cat > "$prompt_file" <<PROMPT
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Read ${OBSERVATIONS_FILE} and identify patterns for the project ${PROJECT_NAME} (user corrections, error resolutions, repeated workflows, tool preferences).
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Read ${analysis_file} and identify patterns for the project ${PROJECT_NAME} (user corrections, error resolutions, repeated workflows, tool preferences).
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If you find 3+ occurrences of the same pattern, create an instinct file in ${INSTINCTS_DIR}/<id>.md.
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CRITICAL: Every instinct file MUST use this exact format:
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@@ -113,7 +129,7 @@ PROMPT
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wait "$claude_pid"
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exit_code=$?
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kill "$watchdog_pid" 2>/dev/null || true
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rm -f "$prompt_file"
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rm -f "$prompt_file" "$analysis_file"
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if [ "$exit_code" -ne 0 ]; then
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echo "[$(date)] Claude analysis failed (exit $exit_code)" >> "$LOG_FILE"
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@@ -130,7 +146,25 @@ on_usr1() {
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[ -n "$SLEEP_PID" ] && kill "$SLEEP_PID" 2>/dev/null
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SLEEP_PID=""
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USR1_FIRED=1
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# Re-entrancy guard: skip if analysis is already running (#521)
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if [ "$ANALYZING" -eq 1 ]; then
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echo "[$(date)] Analysis already in progress, skipping signal" >> "$LOG_FILE"
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return
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fi
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# Cooldown: skip if last analysis was too recent (#521)
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now_epoch=$(date +%s)
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elapsed=$(( now_epoch - LAST_ANALYSIS_EPOCH ))
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if [ "$elapsed" -lt "$ANALYSIS_COOLDOWN" ]; then
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echo "[$(date)] Analysis cooldown active (${elapsed}s < ${ANALYSIS_COOLDOWN}s), skipping" >> "$LOG_FILE"
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return
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fi
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ANALYZING=1
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analyze_observations
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LAST_ANALYSIS_EPOCH=$(date +%s)
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ANALYZING=0
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}
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trap on_usr1 USR1
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@@ -365,24 +365,45 @@ if [ "$OBSERVER_ENABLED" = "true" ]; then
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fi
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fi
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# Signal observer if running (check both project-scoped and global observer, deduplicate)
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signaled_pids=" "
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for pid_file in "${PROJECT_DIR}/.observer.pid" "${CONFIG_DIR}/.observer.pid"; do
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if [ -f "$pid_file" ]; then
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observer_pid=$(cat "$pid_file" 2>/dev/null || true)
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# Validate PID is a positive integer (>1)
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case "$observer_pid" in
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''|*[!0-9]*|0|1) rm -f "$pid_file" 2>/dev/null || true; continue ;;
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esac
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# Deduplicate: skip if already signaled this pass
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case "$signaled_pids" in
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*" $observer_pid "*) continue ;;
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esac
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if kill -0 "$observer_pid" 2>/dev/null; then
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kill -USR1 "$observer_pid" 2>/dev/null || true
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signaled_pids="${signaled_pids}${observer_pid} "
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fi
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# Throttle SIGUSR1: only signal observer every N observations (#521)
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# This prevents rapid signaling when tool calls fire every second,
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# which caused runaway parallel Claude analysis processes.
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SIGNAL_EVERY_N="${ECC_OBSERVER_SIGNAL_EVERY_N:-20}"
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SIGNAL_COUNTER_FILE="${PROJECT_DIR}/.observer-signal-counter"
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should_signal=0
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if [ -f "$SIGNAL_COUNTER_FILE" ]; then
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counter=$(cat "$SIGNAL_COUNTER_FILE" 2>/dev/null || echo 0)
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counter=$((counter + 1))
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if [ "$counter" -ge "$SIGNAL_EVERY_N" ]; then
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should_signal=1
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counter=0
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fi
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done
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echo "$counter" > "$SIGNAL_COUNTER_FILE"
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else
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echo "1" > "$SIGNAL_COUNTER_FILE"
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fi
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# Signal observer if running and throttle allows (check both project-scoped and global observer, deduplicate)
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if [ "$should_signal" -eq 1 ]; then
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signaled_pids=" "
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for pid_file in "${PROJECT_DIR}/.observer.pid" "${CONFIG_DIR}/.observer.pid"; do
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if [ -f "$pid_file" ]; then
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observer_pid=$(cat "$pid_file" 2>/dev/null || true)
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# Validate PID is a positive integer (>1)
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case "$observer_pid" in
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''|*[!0-9]*|0|1) rm -f "$pid_file" 2>/dev/null || true; continue ;;
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esac
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# Deduplicate: skip if already signaled this pass
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case "$signaled_pids" in
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*" $observer_pid "*) continue ;;
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esac
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if kill -0 "$observer_pid" 2>/dev/null; then
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kill -USR1 "$observer_pid" 2>/dev/null || true
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signaled_pids="${signaled_pids}${observer_pid} "
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fi
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fi
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done
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fi
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exit 0
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360
tests/hooks/observer-memory.test.js
Normal file
360
tests/hooks/observer-memory.test.js
Normal file
@@ -0,0 +1,360 @@
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/**
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* Tests for observer memory explosion fix (#521)
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*
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* Validates three fixes:
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* 1. SIGUSR1 throttling in observe.sh (signal counter)
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* 2. Tail-based sampling in observer-loop.sh (not loading entire file)
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* 3. Re-entrancy guard + cooldown in observer-loop.sh on_usr1()
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*
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* Run with: node tests/hooks/observer-memory.test.js
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*/
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const assert = require('assert');
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const path = require('path');
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const fs = require('fs');
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const os = require('os');
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const { spawnSync } = require('child_process');
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let passed = 0;
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let failed = 0;
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function test(name, fn) {
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try {
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fn();
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console.log(` \u2713 ${name}`);
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passed++;
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} catch (err) {
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console.log(` \u2717 ${name}`);
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console.log(` Error: ${err.message}`);
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failed++;
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}
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}
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function createTempDir() {
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return fs.mkdtempSync(path.join(os.tmpdir(), 'ecc-observer-test-'));
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}
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function cleanupDir(dir) {
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try {
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fs.rmSync(dir, { recursive: true, force: true });
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} catch {
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// ignore cleanup errors
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}
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}
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const repoRoot = path.resolve(__dirname, '..', '..');
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const observeShPath = path.join(repoRoot, 'skills', 'continuous-learning-v2', 'hooks', 'observe.sh');
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const observerLoopPath = path.join(repoRoot, 'skills', 'continuous-learning-v2', 'agents', 'observer-loop.sh');
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console.log('\n=== Observer Memory Fix Tests (#521) ===\n');
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// ──────────────────────────────────────────────────────
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// Test group 1: observe.sh SIGUSR1 throttling
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// ──────────────────────────────────────────────────────
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console.log('--- observe.sh signal throttling ---');
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test('observe.sh contains SIGNAL_EVERY_N throttle variable', () => {
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const content = fs.readFileSync(observeShPath, 'utf8');
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assert.ok(
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content.includes('SIGNAL_EVERY_N'),
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'observe.sh should define SIGNAL_EVERY_N for throttling'
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);
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});
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test('observe.sh uses a counter file instead of signaling every call', () => {
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const content = fs.readFileSync(observeShPath, 'utf8');
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assert.ok(
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content.includes('.observer-signal-counter'),
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'observe.sh should use a signal counter file'
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);
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});
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test('observe.sh only signals when counter reaches threshold', () => {
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const content = fs.readFileSync(observeShPath, 'utf8');
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assert.ok(
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content.includes('should_signal=0'),
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'observe.sh should default should_signal to 0'
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);
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assert.ok(
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content.includes('should_signal=1'),
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'observe.sh should set should_signal=1 when threshold reached'
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);
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assert.ok(
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content.includes('if [ "$should_signal" -eq 1 ]'),
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'observe.sh should gate kill -USR1 behind should_signal check'
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);
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});
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test('observe.sh default throttle is 20 observations per signal', () => {
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const content = fs.readFileSync(observeShPath, 'utf8');
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assert.ok(
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content.includes('ECC_OBSERVER_SIGNAL_EVERY_N:-20'),
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'Default signal frequency should be every 20 observations'
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);
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});
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// ──────────────────────────────────────────────────────
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// Test group 2: observer-loop.sh re-entrancy guard
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// ──────────────────────────────────────────────────────
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console.log('\n--- observer-loop.sh re-entrancy guard ---');
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test('observer-loop.sh defines ANALYZING guard variable', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('ANALYZING=0'),
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'observer-loop.sh should initialize ANALYZING=0'
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);
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});
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test('on_usr1 checks ANALYZING before starting analysis', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('if [ "$ANALYZING" -eq 1 ]'),
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'on_usr1 should check ANALYZING flag'
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);
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assert.ok(
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content.includes('Analysis already in progress, skipping signal'),
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'on_usr1 should log when skipping due to re-entrancy'
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);
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});
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test('on_usr1 sets ANALYZING=1 before and ANALYZING=0 after analysis', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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// Check that ANALYZING=1 is set before analyze_observations
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const analyzeCall = content.indexOf('ANALYZING=1');
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const analyzeObsCall = content.indexOf('analyze_observations', analyzeCall);
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const analyzeReset = content.indexOf('ANALYZING=0', analyzeObsCall);
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assert.ok(analyzeCall > 0, 'ANALYZING=1 should be set');
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assert.ok(analyzeObsCall > analyzeCall, 'analyze_observations should be called after ANALYZING=1');
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assert.ok(analyzeReset > analyzeObsCall, 'ANALYZING=0 should follow analyze_observations');
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});
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// ──────────────────────────────────────────────────────
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// Test group 3: observer-loop.sh cooldown throttle
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// ──────────────────────────────────────────────────────
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console.log('\n--- observer-loop.sh cooldown throttle ---');
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test('observer-loop.sh defines ANALYSIS_COOLDOWN', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('ANALYSIS_COOLDOWN'),
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'observer-loop.sh should define ANALYSIS_COOLDOWN'
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);
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});
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test('on_usr1 enforces cooldown between analyses', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('LAST_ANALYSIS_EPOCH'),
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'Should track last analysis time'
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);
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assert.ok(
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content.includes('Analysis cooldown active'),
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'Should log when cooldown prevents analysis'
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);
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});
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test('default cooldown is 60 seconds', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('ECC_OBSERVER_ANALYSIS_COOLDOWN:-60'),
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'Default cooldown should be 60 seconds'
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);
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});
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// ──────────────────────────────────────────────────────
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// Test group 4: Tail-based sampling (no full file load)
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// ──────────────────────────────────────────────────────
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console.log('\n--- observer-loop.sh tail-based sampling ---');
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test('analyze_observations uses tail to sample recent observations', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('tail -n "$MAX_ANALYSIS_LINES"'),
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'Should use tail to limit observations sent to LLM'
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);
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});
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test('default max analysis lines is 500', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('ECC_OBSERVER_MAX_ANALYSIS_LINES:-500'),
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'Default should sample last 500 lines'
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);
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});
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test('analysis temp file is created and cleaned up', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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assert.ok(
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content.includes('ecc-observer-analysis'),
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'Should create a temp analysis file'
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);
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assert.ok(
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content.includes('rm -f "$prompt_file" "$analysis_file"'),
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'Should clean up both prompt and analysis temp files'
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);
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});
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test('prompt references analysis_file not full OBSERVATIONS_FILE', () => {
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const content = fs.readFileSync(observerLoopPath, 'utf8');
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// The prompt heredoc should reference analysis_file for the Read instruction.
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// Find the section between the heredoc open and close markers.
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const heredocStart = content.indexOf('cat > "$prompt_file" <<PROMPT');
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const heredocEnd = content.indexOf('\nPROMPT', heredocStart + 1);
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assert.ok(heredocStart > 0, 'Should find prompt heredoc start');
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assert.ok(heredocEnd > heredocStart, 'Should find prompt heredoc end');
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const promptSection = content.substring(heredocStart, heredocEnd);
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assert.ok(
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promptSection.includes('${analysis_file}'),
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'Prompt should point Claude at the sampled analysis file, not the full observations file'
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);
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});
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// ──────────────────────────────────────────────────────
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// Test group 5: Signal counter file simulation
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// ──────────────────────────────────────────────────────
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console.log('\n--- Signal counter file behavior ---');
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test('counter file increments and resets correctly', () => {
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const testDir = createTempDir();
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const counterFile = path.join(testDir, '.observer-signal-counter');
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// Simulate 20 calls - first 19 should not signal, 20th should
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const signalEveryN = 20;
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let signalCount = 0;
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for (let i = 0; i < 40; i++) {
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let shouldSignal = false;
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if (fs.existsSync(counterFile)) {
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let counter = parseInt(fs.readFileSync(counterFile, 'utf8').trim(), 10) || 0;
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counter++;
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if (counter >= signalEveryN) {
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shouldSignal = true;
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counter = 0;
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}
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fs.writeFileSync(counterFile, String(counter));
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} else {
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fs.writeFileSync(counterFile, '1');
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}
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if (shouldSignal) signalCount++;
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}
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// 40 calls with threshold 20 should signal exactly 2 times
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// (at call 20 and call 40)
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assert.strictEqual(signalCount, 2, `Expected 2 signals over 40 calls, got ${signalCount}`);
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cleanupDir(testDir);
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});
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test('counter file handles missing/corrupt file gracefully', () => {
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const testDir = createTempDir();
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const counterFile = path.join(testDir, '.observer-signal-counter');
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// Write corrupt content
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fs.writeFileSync(counterFile, 'not-a-number');
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const counter = parseInt(fs.readFileSync(counterFile, 'utf8').trim(), 10) || 0;
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assert.strictEqual(counter, 0, 'Corrupt counter should default to 0');
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cleanupDir(testDir);
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});
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// ──────────────────────────────────────────────────────
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// Test group 6: End-to-end observe.sh signal throttle (shell)
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// ──────────────────────────────────────────────────────
|
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|
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console.log('\n--- observe.sh end-to-end throttle (shell execution) ---');
|
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|
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test('observe.sh creates counter file and increments on each call', () => {
|
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// This test runs observe.sh with minimal input to verify counter behavior.
|
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// We need python3, bash, and a valid project dir to test the full flow.
|
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// We use ECC_SKIP_OBSERVE=0 and minimal JSON so observe.sh processes but
|
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// exits before signaling (no observer PID running).
|
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|
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const testDir = createTempDir();
|
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const projectDir = path.join(testDir, 'project');
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fs.mkdirSync(projectDir, { recursive: true });
|
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|
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// Create a minimal detect-project.sh that sets required vars
|
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const skillRoot = path.join(testDir, 'skill');
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const scriptsDir = path.join(skillRoot, 'scripts');
|
||||
const hooksDir = path.join(skillRoot, 'hooks');
|
||||
fs.mkdirSync(scriptsDir, { recursive: true });
|
||||
fs.mkdirSync(hooksDir, { recursive: true });
|
||||
|
||||
// Minimal detect-project.sh stub
|
||||
fs.writeFileSync(path.join(scriptsDir, 'detect-project.sh'), [
|
||||
'#!/bin/bash',
|
||||
`PROJECT_ID="test-project"`,
|
||||
`PROJECT_NAME="test-project"`,
|
||||
`PROJECT_ROOT="${projectDir}"`,
|
||||
`PROJECT_DIR="${projectDir}"`,
|
||||
`CLV2_PYTHON_CMD="${process.platform === 'win32' ? 'python' : 'python3'}"`,
|
||||
''
|
||||
].join('\n'));
|
||||
|
||||
// Copy observe.sh but patch SKILL_ROOT to our test dir
|
||||
let observeContent = fs.readFileSync(observeShPath, 'utf8');
|
||||
observeContent = observeContent.replace(
|
||||
'SKILL_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"',
|
||||
`SKILL_ROOT="${skillRoot}"`
|
||||
);
|
||||
const testObserve = path.join(hooksDir, 'observe.sh');
|
||||
fs.writeFileSync(testObserve, observeContent, { mode: 0o755 });
|
||||
|
||||
const hookInput = JSON.stringify({
|
||||
tool_name: 'Read',
|
||||
tool_input: { file_path: '/tmp/test.txt' },
|
||||
session_id: 'test-session',
|
||||
cwd: projectDir
|
||||
});
|
||||
|
||||
// Run observe.sh twice
|
||||
for (let i = 0; i < 2; i++) {
|
||||
spawnSync('bash', [testObserve, 'post'], {
|
||||
input: hookInput,
|
||||
env: {
|
||||
...process.env,
|
||||
HOME: testDir,
|
||||
CLAUDE_CODE_ENTRYPOINT: 'cli',
|
||||
ECC_HOOK_PROFILE: 'standard',
|
||||
ECC_SKIP_OBSERVE: '0',
|
||||
CLAUDE_PROJECT_DIR: projectDir
|
||||
},
|
||||
timeout: 5000
|
||||
});
|
||||
}
|
||||
|
||||
const counterFile = path.join(projectDir, '.observer-signal-counter');
|
||||
if (fs.existsSync(counterFile)) {
|
||||
const val = fs.readFileSync(counterFile, 'utf8').trim();
|
||||
const counterVal = parseInt(val, 10);
|
||||
assert.ok(
|
||||
counterVal >= 1 && counterVal <= 2,
|
||||
`Counter should be 1 or 2 after 2 calls, got ${counterVal}`
|
||||
);
|
||||
} else {
|
||||
// If python3 is not available the hook exits early - that is acceptable
|
||||
const hasPython = spawnSync('python3', ['--version']).status === 0;
|
||||
if (hasPython) {
|
||||
assert.fail('Counter file should exist after running observe.sh');
|
||||
}
|
||||
}
|
||||
|
||||
cleanupDir(testDir);
|
||||
});
|
||||
|
||||
// ──────────────────────────────────────────────────────
|
||||
// Summary
|
||||
// ──────────────────────────────────────────────────────
|
||||
|
||||
console.log('\n=== Test Results ===');
|
||||
console.log(`Passed: ${passed}`);
|
||||
console.log(`Failed: ${failed}`);
|
||||
console.log(`Total: ${passed + failed}\n`);
|
||||
|
||||
process.exit(failed > 0 ? 1 : 0);
|
||||
Reference in New Issue
Block a user