chore: remove fast return to flush current queue log data during shutdown

[Revolyssup]

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[Revolyssup]

Test to check number of logs match number of requests with reloads

#!/bin/bash

# Configurable variables
DURATION_HOURS=${1:-1}  # Default to 1 hour if no argument provided
RELOAD_INTERVAL=10
LOG_FILE="logs/file.log"

# Calculate duration in seconds
DURATION_SECONDS=$((DURATION_HOURS * 3600))

# Initialize counters
START_TIME=$(date +%s)
END_TIME=$((START_TIME + DURATION_SECONDS))

echo "Starting test for $DURATION_HOURS hour(s) ($DURATION_SECONDS seconds)"
echo "Start time: $(date)"
echo "End time: $(date -d "@$END_TIME")"
echo "Reload interval: $RELOAD_INTERVAL seconds"
echo "Log file: $LOG_FILE"
echo "----------------------------------------"

# Create log file if it doesn't exist
mkdir -p "$(dirname "$LOG_FILE")"
touch "$LOG_FILE"

# Get initial line count
INITIAL_LINE_COUNT=$(wc -l < "$LOG_FILE" 2>/dev/null || echo 0)
echo "Initial line count in log: $INITIAL_LINE_COUNT"

# Create a temporary file for request counting
REQUEST_FILE=$(mktemp)
echo "Request count file: $REQUEST_FILE"

# Function to send curl requests
send_requests() {
    local count=0
    while [ $(date +%s) -lt $END_TIME ]; do
        curl -s "http://localhost:9080" > /dev/null 2>&1
        count=$((count + 1))
        echo "request" >> "$REQUEST_FILE"
        # Small delay to prevent overwhelming the system
        sleep 0.1
    done
    echo "Sent $count requests"
}

# Function to perform reloads
perform_reloads() {
    while [ $(date +%s) -lt $END_TIME ]; do
        sleep $RELOAD_INTERVAL
        if [ $(date +%s) -lt $END_TIME ]; then
            echo "$(date): Performing make reload..."
            make reload > /dev/null 2>&1
        fi
    done
}

# Start the reload process in background
perform_reloads &
RELOAD_PID=$!

# Start the request sender in foreground (so we can count properly)
echo "Starting request sender..."
send_requests &
REQUEST_PID=$!

# Wait for the duration or until the request sender finishes
echo "Test running... (PID: $REQUEST_PID, $RELOAD_PID)"
wait $REQUEST_PID

# Kill reload process if it's still running
kill $RELOAD_PID 2>/dev/null
wait $RELOAD_PID 2>/dev/null

echo "----------------------------------------"
echo "Test completed at: $(date)"

# Wait a moment for any pending log writes
sleep 10

# Get final line count
FINAL_LINE_COUNT=$(wc -l < "$LOG_FILE" 2>/dev/null || echo 0)
LINES_ADDED=$((FINAL_LINE_COUNT - INITIAL_LINE_COUNT))

# Count the number of requests from the temporary file
REQUEST_COUNT=$(wc -l < "$REQUEST_FILE" 2>/dev/null || echo 0)

echo "Final line count in log: $FINAL_LINE_COUNT"
echo "Lines added during test: $LINES_ADDED"
echo "Total curl requests sent: $REQUEST_COUNT"

# Clean up temporary file
rm -f "$REQUEST_FILE"

# Compare results
if [ $LINES_ADDED -eq $REQUEST_COUNT ]; then
    echo "✅ SUCCESS: Number of log lines ($LINES_ADDED) matches number of requests ($REQUEST_COUNT)"
    exit 0
else
    echo "❌ FAILURE: Number of log lines ($LINES_ADDED) does not match number of requests ($REQUEST_COUNT)"
    echo "Difference: $((REQUEST_COUNT - LINES_ADDED))"
    exit 1
fi

Test result

Fri Oct 31 03:28:05 PM IST 2025: Performing make reload...
Fri Oct 31 03:28:15 PM IST 2025: Performing make reload...
Fri Oct 31 03:28:26 PM IST 2025: Performing make reload...
Fri Oct 31 03:28:37 PM IST 2025: Performing make reload...
Sent 29079 requests
----------------------------------------
Test completed at: Fri Oct 31 03:28:42 PM IST 2025
Final line count in log: 29732
Lines added during test: 29079
Total curl requests sent: 29079
✅ SUCCESS: Number of log lines (29079) matches number of requests (29079)