Problem Note 66961: The SAS® Cloud Analytic Services (CAS) server stops responding when you modify a global table, which makes CAS unavailable
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When the CAS procedure appends to a global table at the same time as that table undergoes a global update, the CAS server can stop responding. In this scenario, the table.update action and the table.append actions can deadlock against each other, which causes CAS to require a restart before it is available again.
If you experience this issue, the CAS logs show that at least one of the table.update actions never completes successfully. The log file does not contain any error to identify this issue. You can find the latest CAS logs in /opt/sas/viya/config/var/log/cas/default/.
In this scenario, the log contains an entry similar to the following after the update:
When the update completes, the CAS log should show something similar to the following indicating that it was successful:
When you encounter this issue, the log never shows the message that the table.update is successful.
This issue causes the CAS server to stop responding and require a restart to temporarily resolve the issue.
Click the Hot Fix tab in this note for a link to instructions about accessing and applying the software update.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS Viya | Microsoft Windows 8 Pro x64 | 3.5 | Viya | ||
| Microsoft Windows 8 Pro 32-bit | 3.5 | Viya | ||||
| Microsoft® Windows® for x64 | 3.5 | Viya | ||||
| Microsoft Windows 8 Enterprise 32-bit | 3.5 | Viya | ||||
| Microsoft Windows 8 Enterprise x64 | 3.5 | Viya | ||||
| Microsoft Windows 8.1 Enterprise 32-bit | 3.5 | Viya | ||||
| Microsoft Windows 8.1 Enterprise x64 | 3.5 | Viya | ||||
| Microsoft Windows 8.1 Pro 32-bit | 3.5 | Viya | ||||
| Microsoft Windows 8.1 Pro x64 | 3.5 | Viya | ||||
| Microsoft Windows 10 | 3.5 | Viya | ||||
| Microsoft Windows 95/98 | 3.5 | Viya | ||||
| Microsoft Windows 2000 Advanced Server | 3.5 | Viya | ||||
| Microsoft Windows 2000 Datacenter Server | 3.5 | Viya | ||||
| Microsoft Windows 2000 Server | 3.5 | Viya | ||||
| Microsoft Windows 2000 Professional | 3.5 | Viya | ||||
| Microsoft Windows NT Workstation | 3.5 | Viya | ||||
| Microsoft Windows Server 2003 Datacenter Edition | 3.5 | Viya | ||||
| Microsoft Windows Server 2003 Enterprise Edition | 3.5 | Viya | ||||
| Microsoft Windows Server 2003 Standard Edition | 3.5 | Viya | ||||
| Microsoft Windows Server 2003 for x64 | 3.5 | Viya | ||||
| Microsoft Windows Server 2008 | 3.5 | Viya | ||||
| Microsoft Windows Server 2008 R2 | 3.5 | Viya | ||||
| Microsoft Windows Server 2008 for x64 | 3.5 | Viya | ||||
| Microsoft Windows Server 2012 Datacenter | 3.5 | Viya | ||||
| Microsoft Windows Server 2012 R2 Datacenter | 3.5 | Viya | ||||
| Microsoft Windows Server 2012 R2 Std | 3.5 | Viya | ||||
| Microsoft Windows Server 2012 Std | 3.5 | Viya | ||||
| Microsoft Windows Server 2016 | 3.5 | Viya | ||||
| Microsoft Windows Server 2019 | 3.5 | Viya | ||||
| Microsoft Windows XP Professional | 3.5 | Viya | ||||
| Windows 7 Enterprise 32 bit | 3.5 | Viya | ||||
| Windows 7 Enterprise x64 | 3.5 | Viya | ||||
| Windows 7 Home Premium 32 bit | 3.5 | Viya | ||||
| Windows 7 Home Premium x64 | 3.5 | Viya | ||||
| Windows 7 Professional 32 bit | 3.5 | Viya | ||||
| Windows 7 Professional x64 | 3.5 | Viya | ||||
| Windows 7 Ultimate 32 bit | 3.5 | Viya | ||||
| Windows 7 Ultimate x64 | 3.5 | Viya | ||||
| Windows Millennium Edition (Me) | 3.5 | Viya | ||||
| Windows Vista | 3.5 | Viya | ||||
| Windows Vista for x64 | 3.5 | Viya | ||||
| Linux for x64 | 3.5 | Viya | ||||