event-scheduler | Always-On event scheduler | Job Scheduling library
kandi X-RAY | event-scheduler Summary
kandi X-RAY | event-scheduler Summary
The Event Scheduler uses an internal thread to allow the application to schedule events to occur either ASAP or at a specified time in the future. Instead of blocking your application's main thread, you can concurrently run some lightweight tasks. We took some inspiration for the API design from library's scheduler. Unlike the native sched module, the Event Scheduler is always on and ready to accept events. Event Scheduler is completely thread-safe too!.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Run the scheduler
- Schedule a recurring event
- Notify the thread
- Stop the scheduler
- Cancel an event
- Cancel all pending requests
- Enter Los Angeles
- Insert an event into the queue
- Create an event
- Return the list of queued events
- Start the scheduler
- Takes a list of transactions
event-scheduler Key Features
event-scheduler Examples and Code Snippets
Community Discussions
Trending Discussions on event-scheduler
QUESTION
I'm trying to create an Event in MySQL 5.6 and I'm getting an error whenever I try to DECLARE something, like a parameter or handler:
SQL Error [1064] [42000]: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET @rollMeBack = TRUE;
I'm a SQL Server guy and the syntax is giving me ulcers. I tried declaring a variable like in this question, but I still get the error at that line. Help me Obi Wan Kenobi: you're my only hope.
Entire (obfuscated) code:
...ANSWER
Answered 2020-Nov-13 at 20:34A couple of modifications render this operable.
Firstly, the handler must be declared in the correct place. From the docs:
Handler declarations must appear after variable or condition declarations.
Secondly, the DO IF EXISTS...END IF;
should contain a BEGIN...END
block after which you do your handler declaration:
QUESTION
I'm using MySQL 8.0.21 From the MySQL Community Installer on Windows 10 updated to version2004 and for some reason if I create a event in the event scheduler, which calls a procedure once every second (regardless of what that SP actually does, I'll explain my test case) - my CPU maxes out and when I look at the active connections in MySQL Workbench, it stacks up a ton of worker threads which stall on the "Opening Tables" state. My PC freezes, I have to edit the event to be disabled, stop the MySQL process in Task Manager and Start the service again.
TEST CASE
During setup of a brand new server, I used all default settings, except I enabled the general log and I use the new 8.0+ mysql_sha2_password encryption (although I ALTER USER to mysql_native_password for phpmyadmin so that might revert it, I'm honestly not sure)
- I create a new Schema called "Test"
- I create one Table called "TestTable" has only one column called "column1" INT
- I then create a Stored Procedure "TestProc" which does "SELECT COUNT(*) FROM TestTable;" Adjusts Priv.'s, DEFINER::Definer is root@localhost and Reads SQL
- And Finally I create an Event called "TestEvent" which does "CALL TestProc()s" Reoccurring every 1/sec, preserve on Complete, and definer is root@localhost
- restart server before event is fired.
Also, if I enable the event, or create it, it'll run without issue, it's important to note that the issue begins when the event scheduler is left on, and the event is left enabled, then the server is restarted from the services in task manager. Immediately the CPU jacks up to max and active connections show threads stacking up without completing. Any clues are appreciated, I find no actual errors nor do I have any idea where to begin debugging anymore. I've tried skipping grant tables (but obviously that's not optimal, and didn't work).
I did find a hint when reviewing the MySQL 8.0+ docs
"If a repeating event does not terminate within its scheduling interval, the result may be multiple instances of the event executing simultaneously. If this is undesirable, you should institute a mechanism to prevent simultaneous instances. For example, you could use the GET_LOCK() function, or row or table locking. " from
However, when analyzing there does not appear to be any locks, nor should I need to implement such manually just for this test case (or my actual program)
UPDATE
Up to this point, albeit a rather niche bug, I do believe that is exactly what this is, and I have posted it on MySQL bug forum. Reference post is here:
...ANSWER
Answered 2020-Aug-12 at 05:44The answer actually has turned out to be a bug which is reproducible - Bug#: 100449
QUESTION
Currently my serverless.yml file looks like this:
...ANSWER
Answered 2020-Jul-01 at 08:53I tried to replicate the issue using serverless
framework.
To do so I added the following AWS::Lambda::Permission to the end of your template:
QUESTION
I want to populate a dropdownlist with values from a table I created called Venues. This table has only two things in it, the Venue Id and Name.
I created a Code First Entity Data Model from the database that holds the table Venues and I created this method in my controller:
...ANSWER
Answered 2017-Jul-02 at 08:14Let's see your code.(check the comments)
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install event-scheduler
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page