App crashes when on MySQL error

[hohomouse]

Hi team,

I am quite new to nodejs.
I searched the issues and not found the same, hence come to create a new issue.

I already added on 'error' function, like this:

con.on('error', function(err){
    console.log(err.code);
});

But whenever MySQL error happens like selecting non-exists table, my App always crashes.

select * from not_exists_table

/home/user/my-project/node_modules/mysql/lib/protocol/Parser.js:78
        throw err; // Rethrow non-MySQL errors
        ^
Error:
 ER_NO_SUCH_TABLE: Table 'my-database.not_exists_table' doesn't exist

Don't know how to make App don't crash when MySQL error happens.

Thanks,
HoHo

[dougwilson]

Hi @hohozhao can you share your Node.js code? It looks like you may have a throw error in your code, which is crashing your app.

[hohomouse]

Hi @dougwilson ,
Thanks for quick reply.

YOU ARE CORRECT!
I did use throw err, and thinking it just "throw" out error message and continue, but instead it dies.
Now I remove "throw err" and "use console.log(err)" and my App continues.

You can close this issues now. I am young to mysqljs but love it!
Cheers,
HoHo

[numberend]

Sequence.js is buggy! if table or data not found sequence cannot not return a stack!
The code is no checking it, therefore parser.js is exceptional.

Otherwise i not understand the logic on parser.js line 79, it's directly bypasing error statement!

Sequence.js
Buggy 115. if (err.stack.indexOf(LONG_STACK_DELIMITER) !== -1)
Correct 115. if (!err.stack || err.stack.indexOf(LONG_STACK_DELIMITER) !== -1)

Thanks.

[dougwilson]

Hi @numberend please feel free to submit a pull request. Be sure to include a new test that fails without your fix and passes with it :)