Ajax call encounters 404 error but successfully executes upon manual page refresh (F5)

I am encountering a frustrating issue with my javascript portal-like application (built on JPolite) where modules are loaded using the $.ajax jquery call.

However, the initial request fails with a 404 error when a user first opens their browser. The app is hosted at https://localhost:8443/context. Firebug reveals that the request is made to /:8443/context/file.html, which is incorrect.

Oddly enough, after refreshing the browser (F5), everything works perfectly fine and the requests are well-formed. I experienced a similar issue in another app based on JBoss portal, but it was resolved after migrating to the latest version.

I suspect this problem may be related to caching or something of that sort. Unfortunately, my search on Google did not yield any helpful solutions, so any insights would be greatly appreciated.

javajavascriptjqueryajax

Answer №1

After searching for a solution, I was able to identify the problem on my own. It turned out that the log configuration was incorrect and I had overlooked a crucial error message: 

ERROR: org.hibernate.util.JDBCExceptionReporter - Already closed
.
Due to periods of inactivity, the MySQL server was closing the current connection which was causing requests to fail with an AlreadyClosedException. By adding validationQuery="select 1" to my context.xml file, I was able to resolve this issue.

Answer №2

When there has been no activity for a while, the mysql server will automatically close the current connection.

It is best practice to always close connections as soon as you are done with your database operations. Don't just leave them idle and wait for the SQL server to close the connection for you.

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