Cpk | C&CZ News

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For RU wide service interruption see meldingen.ru.nl.

Service Interruptions

1407: NFS problems under investigation

When we moved the gateways of our networks from the old location to the new firewalls, we have received some complaints about NFS filesystems having slowness, longer delays or unavailability. In general NFS should never be a requirement for a clusternode job if you can avoid it, because this I/O is always much slower than local I/O from /scratch. We are investigating how we can optimise the network to resolve this issue, but we are hard pressed to know the exact cause of the problem....

1415: Clusternode maintenance day - February 6th 2026

Every half year we do clusternode maintenance, with at least a package ugprade and a reboot, but sometimes other maintenance can happen, such as changes in filesystems or network configurations. The upcoming date for this maintenance is February 6th, 2026 (Friday)

1417: Network changes websites

To make the network less complicated and more easily manageable, we need to make vlans for the subnets 131.174.8.0/24 and 131.174.9.0/24, this will involve some servers getting a new ip address. This affects firewall rules as well. We must coordinate this with ILS networking and the changes will cause disruptions between a few minutes up to a quarter of an hour. List of sites: alice.science.ru.nl alicecontrol.science.ru.nl coursetimetable.science.ru.nl dmarcreport.science.ru.nl edutools.science.ru.nl eduview.science.ru.nl...

Resolved Reports

1179: Gitlab temporarily unavailable

Because of a major security update that will be released tonight, GitLab will not be available. We will update GitLab on Tuesday morning. After that, gitlab.science.ru.nl will be available again.

1178: Gitlab backup accidentially restored on production server

A backup file, dated “Fri Apr 29 05:07:04 CEST 2016” has accidentially been restored on our production GitLab server, where it should have happened on a test server. This caused all repositories, wiki’s, issues etc. to be reset to the state of today 5.07 AM. Commits pushed between 5 am and 2:30 PM should be pushed again. Sorry for the inconvenience.

1177: Server coma00 Monday morning reboot failed

The server comas1 did not start, probably due to some timing problems between the RAID array and OS. Solution: reboot - hardware reset.

1175: RU mailserver blacklisted, for Science too

Yesterday the RU outgoing mailserver smtpout3.ru.nl got listed on the SORBS blacklist of confirmed senders of spam and phishing mails. The reason probably is that recently many students fell for phishing mails, which made their username and password known to Internet criminals. These criminals use that to send spam and phishing mails. Because also the Science mailservers use that blacklist, we did not accept mail from the RU mailserver anymore. The senders received an error message: “Your message wasn’t delivered due to a permission or security issue....

1174: Power failure

Several services were inaccessible due to power loss of a rack switch caused by a failing PDU (power distribution unit). The PDU has been temporarily replaced. Sevices include: home directories, printing, authentication services, licenses, vpn, websites, databases, mailman and dns resolvers.

1173: Hardware replacement webserver

Memory modules and or the motherboard of webserver ‘oehoe’ will be replaced. The mentioned web sites will not be available for a while. Affected web services: aerochem,akn,aqua,bgard,boekingen,bomen,cac,cafe,celbi,docenten,exo,filosofie,hfml iconic,ifl,irmacrash,itp2011,iwwr-boookings,kanboard,kndv,labservant,math,mbfys,mbp,mealab, nieuwescheikunde,nlt,pilab,printeger,probiomed,puff,pz,qpl,quantumcs,ra,refbase,rrl, scheikundeolympiade,siam,sigma-lustrum,smartech4health,sws,theorphys,tk,toernooi,tredd, trooster,vsc,w4kangoeroe,wortel,zwaartekrachtsgolven

1172: Hardware failure webserver

A defective memory module caused spontaneous reboots. Since two modules where taken out, these reboots have not occurred anymore. Additional down time will be needed to resolve the problem. Affected services: aerochem,akn,aqua,bgard,boekingen,bomen,cac,cafe,celbi,docenten,exo,filosofie,hfml iconic,ifl,irmacrash,itp2011,iwwr-boookings,kanboard,kndv,labservant,math,mbfys,mbp,mealab, nieuwescheikunde,nlt,pilab,printeger,probiomed,puff,pz,qpl,quantumcs,ra,refbase,rrl, scheikundeolympiade,siam,sigma-lustrum,smartech4health,sws,theorphys,tk,toernooi,tredd, trooster,vsc,w4kangoeroe,wortel,zwaartekrachtsgolven

1171: Gitlab upgrade

Because of an upgrade of gitlab to version 8.5.7, the GitLab service was offline for a while.

1169: emoe stuck at reboot

At reboot time some file system (/opt) was not recognized, resulting in a kernel panic. Solutio: Reboot

1170: Server isolator lacking private class networks

For yet unknown reasons the private class network interfaces where incorrectly numbered and activated Solution: Reboot