reconnect

Is there any way to have the JBoss connection pool reconnect to Oracle when connections go bad?

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Whilst you can use the old “select 1 from dual” trick, the downside with this is that it issues an extra query each and every time you borrow a connection from the pool. For high volumes, this is wasteful. JBoss provides a special connection validator which should be used for Oracle: <valid-connection-checker-class-name> org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker </valid-connection-checker-class-name> This … Read more

Should WebSocket.onclose be triggered by user navigation or refresh?

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The unexpected behavior is due to the way in which Firefox and Chrome handle the closing of a Websocket. When the page is refreshed, both browsers close the connection, however, Firefox will execute your onclose code, while chrome closes the connection and skips straight to re-loading the new page. So yes, I confirm this strange … Read more

When does a reconnect in signalR occur?

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A hub reconnect occurs when a client goes offline then regains connectivity shortly after. SignalR configuration values largely determine the time stamps of the following examples so do not take the times verbatim. Here are several examples and their outcomes (time format m:ss) involving reconnecting behavior: When I Mention the following i am referring to … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)