Exiting Oracle Java SE. The migration map.

Leaving the Oracle Java SE subscription is an inventory exercise first. Find where Oracle Java actually runs, then move what you can to free OpenJDK builds.

Why should you exit the Oracle Java SE subscription now?

Oracle moved Java SE to a per employee Universal Subscription in 2023. You now pay for every employee, not for the servers running Java. The Oracle Java SE licensing FAQ confirms the model.

For most enterprises the new metric multiplies the bill several times over. That is the trigger to move to free builds.

How does the per employee metric change the math?

The old metric counted processors or named users. The new one counts total employees. A company with a handful of Java servers but thousands of staff sees a bill out of all proportion to usage.

• Old basis: processors or named users running Java.
• New basis: total employee count across the organization.
• Effect: the bill decouples from actual Java usage.

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How do you build a complete Java inventory?

Scan every server and endpoint for Java installations. Record the vendor, version, and download source. Oracle audits open with My Oracle Support download logs, so your records must match reality.

Free tooling and standard discovery agents both work. The goal is a single list of every Java runtime and who installed it.

Which Java builds are paid and which are free?

Oracle JDK under the current license is paid for production. Free options exist that are functionally equivalent for most workloads.

What are the best OpenJDK migration targets?

Standard server applications and internal tools migrate first. They rarely depend on Oracle specific features. Production grade builds come from the Eclipse Adoptium project and the OpenJDK community.

What about vendor certified applications?

Some software vendors certify only Oracle JDK. Check each one. Many now support OpenJDK builds, and the vendor download page is the authority, not Oracle sales.

How do you manage the audit and support risk?

Document every Oracle Java removal with a date and a machine. Keep the records. If Oracle opens an audit, your inventory and removal log are the defense.

Do you lose support by leaving Oracle?

You move support, not lose it. Free builds carry community or vendor support, and paid support contracts exist from several providers if you need a service level. Compare them against the Oracle JDK download terms.

Where the common advice on leaving Oracle Java is wrong

The standard Oracle account team line is that the Universal Subscription is simpler and that OpenJDK carries hidden risk. We disagree. In roughly 30 to 40 Java exits we guided, Oracle Java actually ran on only 10 to 30 percent of the machines the per employee bill assumed, and free builds like Temurin and Corretto covered the vast majority with no code change. The buyer side move is to inventory the estate, migrate everything that does not require a certified Oracle build, and keep a removal log as audit defense. The risk lives in poor visibility, not in OpenJDK itself.

What to do next

1. Scan every server and endpoint for Java installations and record the source.
2. Reconcile your inventory against Oracle download logs from My Oracle Support.
3. Sort workloads into free build targets and certified Oracle only exceptions.
4. Pilot a free OpenJDK build on a representative set of applications.
5. Roll the migration out in waves, logging every Oracle removal with a date.
6. Decide on community or paid support for the remaining free builds.
7. Cancel the Oracle Java subscription only after the removal log is complete.

Frequently asked questions

Can I legally exit the Oracle Java SE subscription?

Yes. Once you remove Oracle JDK from production and replace it with a free build, you can cancel the subscription. Keep a dated removal log as evidence for any future audit.

How much can I save by leaving Oracle Java?

Realistic savings run 60 to 90 percent of the Oracle Java bill. The exact figure depends on how much of your estate truly needs a certified Oracle build.

Is OpenJDK the same as Oracle Java?

OpenJDK is the open source reference that Oracle JDK is built from. Builds like Temurin and Corretto are functionally equivalent for most workloads and are free for production.

Will leaving Oracle Java break my applications?

Rarely. Most server applications and internal tools run on free builds with no code change. Vendor certified applications need a per application check.

Do I lose support if I leave Oracle?

You move support rather than lose it. Free builds carry community or vendor support, and paid support is available from several providers if you need a service level.

What triggers an Oracle Java audit?

Oracle Java reviews usually start from download records on My Oracle Support. Matching your inventory to those records is the core of audit readiness.

Which free Java build should I choose?

Eclipse Temurin suits most estates. Amazon Corretto fits AWS heavy environments. Choose by your support and platform needs, not by brand.

How long does an Oracle Java exit take?

Most estates complete in a few months. Inventory is the slow part. Once the list is accurate, migration moves in waves.