[discrete]
[[breaking_80_system_req_changes]]
==== System requirement changes

TIP: {ess-skip-section}

.Several EOL operating systems are no longer supported.
[%collapsible]
====
*Details* +
The following operating systems have reached their end of life and are no longer
supported by {es}:

* Amazon Linux
* CentOS 6
* Debian 8
* openSUSE Leap 42
* Oracle Enterprise Linux 6
* Ubuntu 16.04

We've also removed support for `SysV init`. No supported operating systems use
the `SysV init` process.

*Details* +
Ensure your nodes use a
https://www.elastic.co/support/matrix#matrix_os[supported operating system].
Running {es} on an unsupported operating system can result in unexpected errors
or failures.
====

.Java 17 is required.
[%collapsible]
====
*Details* +
Java 17 or higher is now required to run {es} and any of its command
line tools.

*Impact* +
Use Java 17 or higher. Attempts to run {es} 8.0 using earlier Java versions will
fail.

There is not yet a FIPS-certified security module for Java 17 
that you can use when running {es} 8.0 in FIPS 140-2 mode. 
If you run in FIPS 140-2 mode, you will either need to request an exception 
from your security organization to upgrade to {es} 8.0, 
or remain on {es} 7.x until Java 17 is certified.
====

.`JAVA_HOME` is no longer supported.
[%collapsible]
====
*Details* +
`JAVA_HOME` is no longer supported to set the path for the JDK. Instead, use
the bundled JDK (preferable), or set `ES_JAVA_HOME`.

*Impact* +
Use the bundled JDK (preferable), or set `ES_JAVA_HOME`. `JAVA_HOME` will be
ignored.
====