[jbossts-issues] [JBoss JIRA] Updated: (JBTM-441) AppServerJDBCXARecovery does not cope with stale connections

John Mazzitelli (JIRA) jira-events at lists.jboss.org
Wed Dec 3 19:11:36 EST 2008

     [ https://jira.jboss.org/jira/browse/JBTM-441?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

John Mazzitelli updated JBTM-441:

    Attachment: AppServerJDBCXARecovery.java

see attached AppServerJDBCXARecovery.java that i'm using.

I confirmed that this does two things:

1) survives when the data source is not yet deployed (therefore, addresses JBTM-442 also)
2) survives if the connection under the covers goes bad

Note that this attempts to use the JRE 1.6 API "isValid" method to attempt to check to see if the connection is still valid.  If it is still valid, it reuses the connection. If it is not valid, it will throw the connection away. But if the isValid method isn't even supported (running on JDK 1.5 or the supporting implementation classes do not support it), this flags the datasource as "not supporting" this feature and will thereafter re-create the connection every time, never trying to validate the connection.

> AppServerJDBCXARecovery does not cope with stale connections
> ------------------------------------------------------------
>                 Key: JBTM-441
>                 URL: https://jira.jboss.org/jira/browse/JBTM-441
>             Project: JBoss Transaction Manager
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: Application Server Integration
>    Affects Versions: 4.2.3.SP7, 4.2.3.CP02
>            Reporter: Jonathan Halliday
>            Assignee: Jonathan Halliday
>             Fix For: 4.2.3.SP8, 4.2.3.CP03
>         Attachments: AppServerJDBCXARecovery.java
> If the db bounces whilst the app server stays up, the AppServerJDBCXARecovery is left holding an invalid connection, which causes XAResource on it to throw spurious errors. It should refresh the connection on every call, or at least check it for validity before handing out an XAResource based on it.

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