Release Notes for NorduGrid ARC 6.20

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June 30, 2024

Several important updates in this release. See below in highlights and Bugzilla tickets.

Highlights in this release

The most important changes in this release are the configurable support of APEL version (Bugzilla #4184).

For the APEL related bugifx: the default is now v0.2 which is the current APEL format version, while v0.4 can be configured in arc.conf. The configuration is done in the "[arex/jura/apel]" block and the "apel_messages" option. If you do not set the apel_messages option, the default "summaries" value corresponding to v0.2 is used. If you want to use v0.4 use the "summaries-v04" instead.

Note that APEL does not yet support the v0.4 in their production instance.

The following Bugzilla tickets have been addressed or solved


The ARC 6 documentation can be found at this location.

If you miss something or have questions, please contact us!

Installing ARC 6

We recommend to install ARC release using the Nordugrid repository.

Note that if you instead install from EPEL for RHEL7 compatible systems, the ARC 6 packages can be found as nordugrid-arc6-* and not nordugrid-arc-*. This was needed in order to supply both ARC 5 already available for RHEL7 and the new ARC 6.

We provide binary builds for all supported versions of:

In addition we build nightly packages for some older platforms.


You can submit pull requests to our public repo which mirrors our GitLab repo.

The pull requests will be automatically copied over to our Gitlab repo where they will be merged into the source-code if accepted.

Getting in touch

If you need help with the configuration file or have any other questions related to ARC 6, please contact us via

Coming ARC 7 release

Start getting ready for ARC 7. We expect a release after summer. You can already now install the testing version of ARC from the testing repository. For upgrade instructions, please see migration guide.

The support policy of ARC 6 will follow the same policy we had for ARC 5: 1 year security updates, no more development of ARC 6 once ARC 7 is out.

Installing from EPEL

Once the release is out, it can be installed from EPEL using package-name types: nordugrid-arc7-*

Future support of ARC 5-series

As of June 2020 no more security updates are provided to ARC 5. Also since the release of ARC 6 in June 2019, no more development on the ARC 5 code base has been provided.

ARC5 is available in EPEL7 and will stay there. EPEL8 will only contain ARC 6. To install ARC 6 from EPEL7 the package-names are of type: nordugrid-arc6-*.

Known issues

Previous releases

Details of previous releases can be found at the ARC Releases page

NorduGrid homepage