Release Notes for NorduGrid ARC 6.10.1
February 12, 2021
After the brief release of ARC 6.10.0 and the retraction quickly
after, this release tackles the slowness encountered from the hashing code
related to Bug 3980 (GDPR).
We at the same time spotted a problem in the accounting code which also
has been fixed, see Bug 3992.
Highlights in this release
There are two important updates in this release.
The first handles the submitter information in regards to GDPR,
and the second fixes a bug causing AREX to crash.
- Submitters certificate DN and GDPR (Bugzilla 3980).
With ARC 6.10 the submitters DN is now exposed in a hashed format.
This means that ARC no longer publishes the submitters DN in clear text
and therefore complies with GDPR regulations.
Note that the arcsync command from ARC clients version <= 6.9.0 will not work,
as the DN's no longer will match. Updating the ARC client is required for arcsync to work.
- AREX crashes related to the security processing in AREX (Bugzilla 3978).
Some sites experienced regular AREX crashes with the ARC 6.9.0 release.
This was due to a bug in the code which handled the detection of failure in the security processing.
This is now fixed.
In addition to these important changes, the release contains several other bugfixes and improvements as
can be seen in the list of adressed Bugzilla tickets below.
The following Bugzilla tickets have been adressed or solved
- 3993 The amount of fork calls to sha512sum was slowing down infoproviders
- 3992 Wrong function call in AccountingDBAsync
- 3987 AREX crashes - nightlies 20200120 - libcrypto
- 3979 output files with davs:// destination created with wrong filename
- 3978 Bug in detecting security processing failure in A-REX
- 3976 double submission to slurm
- 3962 Arex crash caused by memory leaks with many open handles - nightlies 20200921020916
- 3980 nordugrid-job-globalowner of the nordugrid ldap schema is not GDPR compliant
- 3974 cache info is not published
- 3929 GLUE2ComputingShareMaxMainMemory, GLUE2ComputingShareMaxVirtualMemory and GLUE2ExecutionEnvironmentMainMemorySize affected by homogeneity
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:
- Debian (i386 and amd64)
- Fedora (x86_64)
- CentOS/RHEL (x86_64)
- Ubuntu: (i386 and amd64, both LTS and interim releases) - from Ubuntu 20.04 no i386 support
In addition we build nightly packages for older platforms.
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.
Production Sites already running ARC 5 will still get operational site support in form of
deployment and configuration troubleshooting help via GGUS until end June 2021.
However, we may recommend upgrading to ARC 6 depending on the issues the site is facing.
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-*
Getting in touch
If you need help with the configuration file or have any other questions related to ARC 6, please contact us via
- The arcsync command from ARC clients version <= 6.9.0 will not work together
with ARC >=6.10.0 sites. This is due to the hashing of the submitters DN from ARC version 6.10.0.
Updating the ARC client is required for arcsync to work.
- In Centos8 the openldap server is not installable because slapd is not available in the RHEL8 release (Bugzilla 3944).
As a consequence, the LDAP-based server-side information system interface of the ARC-CE will not be available either.
If interaction with the ARC-CE relies on LDAP-based information schemas (glue1.3 or nordugrid schema),
then we recommend that you stay with Centos7 for the time being.
- Related to the new accounting system introduded in release 6.4.0:
- Accounting records created by ARC 6.4.0 are affected by a bug causing missing benchmark values:
Bug 3921, Comment 3
Recommendations are to update to a newer version of ARC.
The bug report gives instructions on how to manually fix the wrong benchmark values.
Details of previous releases can be found at the ARC Releases page