INSERT randomly don't return.

I have a cron job running every 10 secondes and in it a loop that insert data if there was new data added on blockchain data storage, in short a cron caching Blockchain data into local pg db.

For some reasons, randomly (or at least it feel random), i sometimes get the insert not returning anything and then stay stuck there:

  for (var tx in addToUnconfirmed) {
    console.log("try me")
    try {
      console.log("inside try")
      let insertUnconfirmed = await pool.query(`INSERT INTO unconfirmed ("txid", "height", "function", "address", "update_id") VALUES ($1, $2, $3, $4, $5)`,
      [
        addToUnconfirmed[tx].txid, // current calling tx id
        addToUnconfirmed[tx].height, // height of the tx
        addToUnconfirmed[tx].function, // called function
        addToUnconfirmed[tx].address, // sender address
        addToUnconfirmed[tx].update_id, // for artwork
      ]);
      logger.info("Added txid " + addToUnconfirmed[tx].txid + " with height " + addToUnconfirmed[tx].height + " and function " + addToUnconfirmed[tx].function + " to unconfirmed pool");

    } catch (err) {
      isProcessing = false;
      logger.info(err);
    }
  }

addToUnconfirmed is simply an array with details of a (or multiple) new transaction(s) to insert, it can work 10 call in a row and at 11 just freeze at “inside try” then i manually restart it and all work again, untill next random “no return”.

My connection is as follow:

const pool = new Pool({
  user: process.env.user,
  password: process.env.password,
  host: process.env.host,
  port: "25060",
  database: process.env.database,
  ssl: {
    rejectUnauthorized: false,
    ca: fs.readFileSync('ca-certificate.crt').toString()
  }
});

Any idea what could be the problem? i Have this locally and on remote server, using node-postgres 8.3.3, nodejs 12.15.0

[christopheSeeka]

Im using node-cron, was able to sort it out, i switched from pool to client as you recommanded since i do all sequentially. But i never close with client.end()… else it doesn’t work on next cron call. Will study the doc a bit more and try find better way. Thanks a lot for the help, appreciate it 😃

[boromisp]

What are you using for scheduling the cron job? You might want to try to ensure that only one instance of the script is running at once.