RAL Tier1 Operations Report for 8th April 2019
Review of Issues during the week 1st April 2019 to the 8th April 2019.
|
- We are seeing high outbound packet loss (~1%), over IPv6. Investigations ongoing.
- On Thursday 4th April, around half the containers (which run a job inside) restarted. This killed the job inside them, we do not understand the cause of this yet although it was on a particular subset of machines.
- On Friday 5th April, gdss700 (LHCb) had a double drive failure and needed to be removed from production while it was being rebuilt. Will hopefully be returned to production later today. Still waiting on LHCb for DIRAc update to migrate to Echo. [UPDATE 9/4/19] - This server is now almost 3 drives out, all out. We are currently working on data recovery.
Current operational status and issues
|
Resolved Castor Disk Server Issues
|
Machine
|
VO
|
DiskPool
|
dxtx
|
Comments
|
-
|
-
|
-
|
-
|
-
|
Ongoing Castor Disk Server Issues
|
Machine
|
VO
|
DiskPool
|
dxtx
|
Comments
|
gdss700
|
LHCb
|
lhcb
|
d1t0
|
Server very poorly, almost a case of 3 drives out, all out.
|
Limits on concurrent batch system jobs.
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Notable Changes made since the last meeting.
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Entries in GOC DB starting since the last report.
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Service
|
ID
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
Service
|
ID
|
Scheduled?
|
Outage/At Risk
|
Start
|
End
|
Duration
|
Reason
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
Advanced warning for other interventions
|
The following items are being discussed and are still to be formally scheduled and announced.
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Listing by category:
- DNS servers will be rolled out within the Tier1 network.
Open
GGUS Tickets (Snapshot taken during morning of the meeting).
|
Request id
|
Affected vo
|
Status
|
Priority
|
Date of creation
|
Last update
|
Type of problem
|
Subject
|
Scope
|
Solution
|
140599
|
lhcb
|
in progress
|
very urgent
|
05/04/2019
|
05/04/2019
|
File Access
|
Data access problem at RAL-LCG2
|
WLCG
|
|
140589
|
lhcb
|
in progress
|
very urgent
|
04/04/2019
|
04/04/2019
|
Local Batch System
|
Pilots killed at RAL-LCG2
|
WLCG
|
|
140577
|
lhcb
|
in progress
|
less urgent
|
04/04/2019
|
09/04/2019
|
File Access
|
LHCb disk only files requested with the wrong service class
|
EGI
|
|
140447
|
dteam
|
in progress
|
less urgent
|
27/03/2019
|
02/04/2019
|
Network problem
|
packet loss outbound from RAL-LCG2 over IPv6
|
EGI
|
|
140220
|
mice
|
in progress
|
less urgent
|
15/03/2019
|
08/04/2019
|
Other
|
mice LFC to DFC transition
|
EGI
|
|
139672
|
other
|
in progress
|
urgent
|
13/02/2019
|
08/04/2019
|
Middleware
|
No LIGO pilots running at RAL
|
EGI
|
|
138665
|
mice
|
on hold
|
urgent
|
04/12/2018
|
30/01/2019
|
Middleware
|
Problem accessing LFC at RAL
|
EGI
|
|
138033
|
atlas
|
reopened
|
urgent
|
01/11/2018
|
06/04/2019
|
Other
|
singularity jobs failing at RAL
|
EGI
|
|
GGUS Tickets Closed Last week
|
Request id
|
Affected vo
|
Status
|
Priority
|
Date of creation
|
Last update
|
Type of problem
|
Subject
|
Scope
|
Solution
|
140521
|
ops
|
verified
|
less urgent
|
01/04/2019
|
04/04/2019
|
Operations
|
[Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer@gridftp.echo.stfc.ac.uk
|
EGI
|
The Ceph team have added the problem DN to the local over-ride for the grid map files.
The test has cleared.
|
140511
|
cms
|
solved
|
urgent
|
01/04/2019
|
02/04/2019
|
CMS_Facilities
|
T1_UK_RAL SAM job run out of date
|
WLCG
|
Issue is related to SAM dashboard.
|
140283
|
atlas
|
closed
|
less urgent
|
19/03/2019
|
03/04/2019
|
File Transfer
|
UK RAL-LCG2: DESTINATION SRM_PUT_TURL error
|
WLCG
|
Corrected ownership of the CASTOR dir to atlas001:atlas
|
140278
|
cms
|
closed
|
urgent
|
19/03/2019
|
05/04/2019
|
CMS_Data Transfers
|
Transfers failing from FNAL_Buffer to RAL_Disk
|
WLCG
|
we had a problem with ECHO mistakenly returning the correct size and checksum for files which failed transfers and were corrupt which resulted in them being marked as good by PhEDEx and then lying latent until they were accessed or transferred out.
Transfers recovered.
|
140210
|
atlas
|
closed
|
top priority
|
14/03/2019
|
02/04/2019
|
File Transfer
|
Cannot access some files
|
WLCG
|
These files were lost from RAL-LCG2-ECHO_DATADISK, probably due to an FTS bug which should now be fixed. They were identified here because they were needed by the production team. The ticket submitter has now marked them lost in Rucio.
Independently, we have been analysing the results of the Rucio consistency checker. It identified 163 files lost from this disk. The 5 files listed in this ticket are among the 163. We will mark the remaining files lost in Rucio.
|
139990
|
cms
|
closed
|
urgent
|
01/03/2019
|
03/04/2019
|
CMS_AAA WAN Access
|
T1_UK_RAL xrootd segfaulted
|
WLCG
|
The issue is intermittent and occasional. This segfault is most likely a known problem, which will be addressed in xrootd version 4.9, along with other fixes. RAL will install this when available.
|
|
Day
|
Atlas
|
Atlas-Echo
|
CMS
|
LHCB
|
Alice
|
OPS
|
Comments
|
2019-04-02
|
100
|
100
|
92
|
100
|
100
|
100
|
|
2019-04-03
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2019-04-04
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2019-04-05
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2019-04-06
|
100
|
100
|
100
|
100
|
100
|
84
|
|
2019-04-07
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2019-04-08
|
100
|
100
|
100
|
100
|
100
|
100
|
|
2019-04-09
|
100
|
100
|
100
|
100
|
100
|
100
|
|
Target Availability for each site is 97.0%
|
Red <90%
|
Orange <97%
|
Day |
Atlas HC |
CMS HC |
Comment
|
2019-03-26 |
100 |
99 |
|
2019-03-27 |
100 |
96 |
|
2019-03-28 |
100 |
100 |
|
2019-03-29 |
100 |
100 |
|
2019-03-30 |
100 |
99 |
|
2019-03-31 |
100 |
99 |
|
2019-04-01 |
100 |
100 |
|
2019-04-02 |
100 |
100 |
|
Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud