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I am trying to insert into MYSQL table some data recieved from AJAX post. If original process has made the last call, then call connection.end() in the last callback of the last asynchronous chained function.įor the program I was working on, I counted the lines that was read from the file and I matched the count to another counter counting how many records I have inserted. NodeJS Cannot enqueue Handshake after already enqueuing a Handshake. However, the general idea is to keep track of the original process (in this case reading my file) and check against the last process (in this case my sql insert).
Cannot enqueue quit after invoking quit code#
You need to call database.getConnection all over your code when you need a connection to query, not just once at the start. With multiple chained asynchronous callbacks, how could I know when will that last connection.query() be called?ĭifferent problems may require different exact implementation. From your example code, you are not using the connection pooling you are just acquiring a single connection forever, in which case you may as well not even use the pool at all. Eureka! I need to call it after the last connection.query() ran. Apparently they pushed in unnecessary code in their last iteration that is also bugged. But when I wanted to use the functionality of updating data through transactions I got the following error: Error: Cannot enqueue Query after invoking quit. You'll have to do a lot of refactoring to correct that (I wouldn't have enough time to rewrite your code), but that's the reason. This error is caused by the system not being able to create a pool. query() method chronologically after you called the. A handshake cannot be enqueued after a fatal error. While I can verify that it is being called when I re-invoke it from the home screen (and when onCreate()/onCreateView() is not called), it seems to retain the old value for 'feature' (and, I assume, the entire old Intent).
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“cannot enqueue query after invoking quit”Īfter another few hours of searching the web, node-inspector debugging, and tons of debugger command and console.log(), the dark cloud was lifted away. Cannot enqueue Handshake after invoking quit If you using the node-mysql module, just remove the. Ive been implementing MySQL for NodeJS and Restify and everything has worked perfectly in terms of queries. Thanks So the issue is that in your code, line 139 you are calling the. After a few hours, as I thought I’m close to being done, I get this error: So here I am with node.js, chrome dev tool, asynchronous functions everywhere, trying to process information from a file and insert them into mysql. What better way to go back at it than working with a framework that I have never code in before? Using tools that I’ve never used before! Of course! (Sarcastic laugh, then cry…) mysql Error Cannot enqueue Query after invoking quit on second call onwards: All we need is an easy explanation of the problem, so here. end() connections but it does not help Thanks in advance Radek. For example, the configuration of my config.After years focusing almost exclusively on management and a bit of high level enterprise system architecture, I’m starting to code again. Cannot enqueue Handshake after invoking quit. Create a connection when the server starts, and then always use the connection/client object to query it.ġ. Fixing Node Mysql 'Error: Cannot enqueue Handshake after invoking quit.': TL DR createConnection. If you are serving web requests, you should not close the connection every time the request is processed. end()call is coming from file C:\Users\Iain\Steambot\EditedBotJS.js, line 139. I see that from the error, the particular call happening after the. Therefore, if the number of people is small or the operation is infrequent, you can consider using this method-do not close after connection, The error you provided is because you are chronologically calling connection.query()after you called connection.end(). However, reopening the link is indeed more performance-consuming compared to the general new data operation (insert), which is about 10-100 times that of the new data operation (insert), but unless the application processes more than tens of millions of data per day, otherwise The performance loss caused by re-closing and opening the database link is not obvious.
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The reason for the error is that the connection object of the database is designed so that it cannot be reconnected once it hangs.īut we still hope to end when the database is not in use because the number of connections to the database is limited.