Error: Packets out of order. Got: 1 Expected: 0 - mysql

Question

All the Solutions I found for this Problem don't work for me.
I'm just loading one Dataset and after approximate 150 Request I get this Error:
Error: Packets out of order. Got: 1 Expected: 0
at Parser._tryReadPacketHeader (C:\dev\node\webkoll\node_modules\mysql\lib\protocol\Parser.js:470:15)
at Parser.write (C:\dev\node\webkoll\node_modules\mysql\lib\protocol\Parser.js:33:29)
at Protocol.write (C:\dev\node\webkoll\node_modules\mysql\lib\protocol\Protocol.js:38:16)
at Socket.<anonymous> (C:\dev\node\webkoll\node_modules\mysql\lib\Connection.js:88:28)
at Socket.<anonymous> (C:\dev\node\webkoll\node_modules\mysql\lib\Connection.js:526:10)
at Socket.emit (events.js:223:5)
at addChunk (_stream_readable.js:309:12)
at readableAddChunk (_stream_readable.js:290:11)
at Socket.Readable.push (_stream_readable.js:224:10)
at TCP.onStreamRead (internal/stream_base_commons.js:181:23)
--------------------
at Protocol._enqueue (C:\dev\node\webkoll\node_modules\mysql\lib\protocol\Protocol.js:144:48)
at Protocol.handshake (C:\dev\node\webkoll\node_modules\mysql\lib\protocol\Protocol.js:51:23)
at PoolConnection.connect (C:\dev\node\webkoll\node_modules\mysql\lib\Connection.js:116:18)
at Pool.getConnection (C:\dev\node\webkoll\node_modules\mysql\lib\Pool.js:48:16)
at C:\dev\node\webkoll\dbHelper.js:35:22
at new Promise (<anonymous>)
at dbHelper.execQueryWithParams (C:\dev\node\webkoll\dbHelper.js:34:16)
at dbHelper.loadFinishedResultFlag (C:\dev\node\webkoll\dbHelper.js:68:21)
at C:\dev\node\webkoll\index.js:321:30
at Layer.handle [as handle_request] (C:\dev\node\webkoll\node_modules\express\lib\router\layer.js:95:5) { code: PROTOCOL_PACKETS_OUT_OF_ORDER', fatal: true}
I'm using node v12.14.1 and the npm package mysql v2.18.1.
I also set the max_allowed_packet to 1G but it did not help.
Here the Code i use to get the data:
class dbHelper {
constructor() {
const { host, user, password, database, connectionLimit } = config.db;
this.con = mysql.createPool({
connectionLimit,
host,
user,
password,
database
});
}
async execQueryWithParams(query, params) {
return new Promise((resolve, reject) => {
this.con.getConnection((err, connect) => {
if (err) {
console.log(err);
return reject(err)
}
connect.query(query, [params], (err, result) => {
if (err) {
return reject(err);
}
resolve(result);
})
})
});
}

Answer 1

I found the Problem.
After using the npm package mysql2 I got the error message: "Too many connections".
I dumbly initialized my class way to often, so after using just one instance everything worked fine.

Answer 2

Try to increase the MAX_Packet_Allowed Memory - it works in my case

Answer 3

It can be - your pool connection is lost. Try checking wether it is still up.

Answer 4

You are doing some minor mistake for define variable and function definition on proper ways..
const mysql = require('mysql');
const con = mysql.createConnection({
host : process.env.RDS_HOSTNAME,
user : process.env.RDS_USERNAME,
password : process.env.RDS_PASSWORD,
port : process.env.RDS_PORT,
database : process.env.RDS_DATABASE
});
exports.handler = (event, context, callback) => {
// allows for using callbacks as finish/error-handlers
context.callbackWaitsForEmptyEventLoop = false;
const sql = "select * from user_status";
con.query(sql, function (err, result) {
if (err) throw err;
console.log(result);
callback(null, result)
});
};
I am using the above code and now I m getting data from my RDS.🙂🙂
Note: you need to define your mysql credentials for host,user,password,port,database.