Oracle has issued an "urgent bulletin" asking desktop administrators to immediately turn off the Java Runtime Environment auto-update option "for all Windows end-user desktops connecting to Oracle E-Business Suite Release 11i, 12.0, and 12.1" due to a critical incompatibility.

The auto-update process to JRE 7 will happen as soon as 3 July , but right now, Oracle's Forms development toolkit isn't compatible with Java 7, Oracle said in an official blog post. In addition, it said, the E-Business Suite itself has not been certified for Java 7.

Therefore, "Oracle E-Business Suite functionality based on Forms - eg. Financials - will stop working if you upgrade to JRE 7," the post states.

Administrators should uninstall JRE 7 if the auto-update has already occurred and remain on Java 6 for now, it added.

The first phase of Java 7 certification for E-Business Suite is under way now, according to the post, but no release date was provided.

One commenter on the blog post asked whether E-Business Suite customers using other application tools, such as Oracle Application Framework, would be affected by the auto-update.

In response, an Oracle official said the issue was confined to Forms, but that it would still be wise to hold off updating Java until release 7 is certified with E-Business Suite.

Java 7 was released nearly a year ago, in July 2011.

Oracle's bulletin likely affects many customers, as E-Business Suite is its flagship ERP (enterprise resource planning) software product.

In addition, Forms has a long history at Oracle, even as the vendor releases newer application development frameworks. Still, as of March Oracle had made a public commitment to support Forms for the long term, including a new version as part of the upcoming release of Fusion Middleware 12c.

The vendor also sells the JD Edwards and PeopleSoft ERP lines, as well as its next-generation Fusion Applications, which comprise a superset of functionality from all three suites and are also being oriented more heavily toward cloud deployment models.

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