修復 too many connection 問題
This commit is contained in:
186
lib/ultimate-connection-killer.ts
Normal file
186
lib/ultimate-connection-killer.ts
Normal file
@@ -0,0 +1,186 @@
|
||||
// =====================================================
|
||||
// 終極連線殺手 - 強制清理所有連線
|
||||
// =====================================================
|
||||
|
||||
import mysql from 'mysql2/promise';
|
||||
|
||||
export class UltimateConnectionKiller {
|
||||
private static instance: UltimateConnectionKiller;
|
||||
|
||||
private constructor() {}
|
||||
|
||||
public static getInstance(): UltimateConnectionKiller {
|
||||
if (!UltimateConnectionKiller.instance) {
|
||||
UltimateConnectionKiller.instance = new UltimateConnectionKiller();
|
||||
}
|
||||
return UltimateConnectionKiller.instance;
|
||||
}
|
||||
|
||||
// 終極清理 - 殺死所有連線
|
||||
public async ultimateKill() {
|
||||
console.log('💀 執行終極連線清理...');
|
||||
|
||||
try {
|
||||
// 1. 建立一個臨時連線來執行清理
|
||||
const tempConnection = await mysql.createConnection({
|
||||
host: process.env.DB_HOST || '122.100.99.161',
|
||||
port: parseInt(process.env.DB_PORT || '43306'),
|
||||
user: process.env.DB_USER || 'A999',
|
||||
password: process.env.DB_PASSWORD || '1023',
|
||||
database: process.env.DB_NAME || 'db_AI_Platform',
|
||||
charset: 'utf8mb4',
|
||||
timezone: '+08:00',
|
||||
});
|
||||
|
||||
try {
|
||||
// 2. 獲取所有連線
|
||||
const [connections] = await tempConnection.execute(`
|
||||
SELECT ID, USER, HOST, DB, COMMAND, TIME, STATE, INFO
|
||||
FROM information_schema.PROCESSLIST
|
||||
WHERE USER = ?
|
||||
ORDER BY TIME DESC
|
||||
`, [process.env.DB_USER || 'A999']);
|
||||
|
||||
console.log(`🔍 找到 ${connections.length} 個連線需要清理`);
|
||||
|
||||
// 3. 殺死所有連線（除了當前連線）
|
||||
let killedCount = 0;
|
||||
for (const conn of connections) {
|
||||
if (conn.ID !== tempConnection.threadId) {
|
||||
try {
|
||||
await tempConnection.execute(`KILL ${conn.ID}`);
|
||||
console.log(`💀 已殺死連線 ${conn.ID} (用戶: ${conn.USER}, 時間: ${conn.TIME}s)`);
|
||||
killedCount++;
|
||||
} catch (error: any) {
|
||||
console.log(`⚠️ 無法殺死連線 ${conn.ID}: ${error.message}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
console.log(`✅ 已殺死 ${killedCount} 個連線`);
|
||||
|
||||
// 4. 等待連線完全關閉
|
||||
console.log('⏳ 等待連線完全關閉...');
|
||||
await new Promise(resolve => setTimeout(resolve, 3000));
|
||||
|
||||
// 5. 再次檢查狀態
|
||||
const [finalConnections] = await tempConnection.execute(`
|
||||
SELECT COUNT(*) as count FROM information_schema.PROCESSLIST
|
||||
WHERE USER = ?
|
||||
`, [process.env.DB_USER || 'A999']);
|
||||
|
||||
const remainingConnections = finalConnections[0].count;
|
||||
console.log(`📊 清理後剩餘連線: ${remainingConnections}`);
|
||||
|
||||
if (remainingConnections <= 1) {
|
||||
console.log('🎉 連線清理成功！');
|
||||
} else {
|
||||
console.warn(`⚠️ 仍有 ${remainingConnections - 1} 個連線未清理`);
|
||||
}
|
||||
|
||||
return {
|
||||
success: true,
|
||||
killedCount,
|
||||
remainingConnections: remainingConnections - 1, // 減去當前連線
|
||||
message: `已殺死 ${killedCount} 個連線，剩餘 ${remainingConnections - 1} 個`
|
||||
};
|
||||
|
||||
} finally {
|
||||
// 6. 關閉臨時連線
|
||||
await tempConnection.end();
|
||||
console.log('🔌 臨時連線已關閉');
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
console.error('❌ 終極清理失敗:', error);
|
||||
return {
|
||||
success: false,
|
||||
error: error instanceof Error ? error.message : '未知錯誤'
|
||||
};
|
||||
}
|
||||
}
|
||||
|
||||
// 檢查連線狀態
|
||||
public async checkStatus() {
|
||||
try {
|
||||
const tempConnection = await mysql.createConnection({
|
||||
host: process.env.DB_HOST || '122.100.99.161',
|
||||
port: parseInt(process.env.DB_PORT || '43306'),
|
||||
user: process.env.DB_USER || 'A999',
|
||||
password: process.env.DB_PASSWORD || '1023',
|
||||
database: process.env.DB_NAME || 'db_AI_Platform',
|
||||
charset: 'utf8mb4',
|
||||
timezone: '+08:00',
|
||||
});
|
||||
|
||||
try {
|
||||
// 獲取連線統計
|
||||
const [statusResult] = await tempConnection.execute(`
|
||||
SHOW STATUS LIKE 'Threads_connected'
|
||||
`);
|
||||
|
||||
const [maxConnResult] = await tempConnection.execute(`
|
||||
SHOW VARIABLES LIKE 'max_connections'
|
||||
`);
|
||||
|
||||
const [connections] = await tempConnection.execute(`
|
||||
SELECT ID, USER, HOST, DB, COMMAND, TIME, STATE, INFO
|
||||
FROM information_schema.PROCESSLIST
|
||||
WHERE USER = ?
|
||||
ORDER BY TIME DESC
|
||||
`, [process.env.DB_USER || 'A999']);
|
||||
|
||||
const currentConnections = statusResult[0]?.Value || 0;
|
||||
const maxConnections = maxConnResult[0]?.Value || 100;
|
||||
const usagePercentage = (currentConnections / maxConnections) * 100;
|
||||
|
||||
return {
|
||||
currentConnections: parseInt(currentConnections),
|
||||
maxConnections: parseInt(maxConnections),
|
||||
usagePercentage,
|
||||
connectionDetails: connections,
|
||||
connectionCount: connections.length
|
||||
};
|
||||
|
||||
} finally {
|
||||
await tempConnection.end();
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
console.error('❌ 檢查狀態失敗:', error);
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
// 強制重啟資料庫連線
|
||||
public async forceRestart() {
|
||||
console.log('🔄 強制重啟資料庫連線...');
|
||||
|
||||
try {
|
||||
// 1. 先殺死所有連線
|
||||
await this.ultimateKill();
|
||||
|
||||
// 2. 等待一段時間
|
||||
console.log('⏳ 等待系統穩定...');
|
||||
await new Promise(resolve => setTimeout(resolve, 5000));
|
||||
|
||||
// 3. 檢查狀態
|
||||
const status = await this.checkStatus();
|
||||
|
||||
if (status && status.connectionCount <= 1) {
|
||||
console.log('✅ 資料庫連線重啟成功');
|
||||
return { success: true, message: '資料庫連線重啟成功' };
|
||||
} else {
|
||||
console.warn('⚠️ 資料庫連線重啟後仍有連線存在');
|
||||
return { success: false, message: '重啟後仍有連線存在' };
|
||||
}
|
||||
|
||||
} catch (error) {
|
||||
console.error('❌ 強制重啟失敗:', error);
|
||||
return { success: false, error: error instanceof Error ? error.message : '未知錯誤' };
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 導出單例實例
|
||||
export const ultimateKiller = UltimateConnectionKiller.getInstance();
|
||||
Reference in New Issue
Block a user