Problem Note 45125: SAS_PUT UDF running concurrently in unprotected mode can cause the Teradata server to stop working
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Running two concurrent queries on Teradata with the SAS_PUT or other UDF in unprotected mode can cause memory to become corrupted. These queries interfere with one another and corrupt memory, which puts the SAS code into an infinite loop. This loop causes the Teradata system to remain at 100% CPU usage until the database is shut down. The Teradata server must be shut down because Teradata does not have a way to interrupt the SAS code that is looping. There is a known problem with Teradata not being able to interrupt a runaway UDF.
A workaround is to use protected mode when running queries with UDFs.
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | SAS Release | |
| Reported | Fixed* | |||
| SAS System | SAS/ACCESS Interface to Teradata | Solaris for x64 | ||
| Linux for x64 | ||||
| Solaris | ||||
| Linux | ||||
| HP-UX | ||||
| HP-UX IPF | ||||
| ABI+ for Intel Architecture | ||||
| AIX | ||||
| 64-bit Enabled Solaris | ||||
| 64-bit Enabled AIX | ||||
| 64-bit Enabled HP-UX | ||||
| Windows Vista | ||||
| Windows Vista for x64 | ||||
| Windows Millennium Edition (Me) | ||||
| Windows 7 Ultimate 32 bit | ||||
| Windows 7 Ultimate x64 | ||||
| Windows 7 Professional x64 | ||||
| Windows 7 Home Premium x64 | ||||
| Windows 7 Professional 32 bit | ||||
| Windows 7 Home Premium 32 bit | ||||
| Windows 7 Enterprise 32 bit | ||||
| Windows 7 Enterprise x64 | ||||
| Microsoft Windows XP Professional | ||||
| Microsoft Windows Server 2008 | ||||
| Microsoft Windows Server 2008 for x64 | ||||
| Microsoft Windows Server 2003 for x64 | ||||
| Microsoft Windows Server 2003 Standard Edition | ||||
| Microsoft Windows Server 2003 Enterprise Edition | ||||
| Microsoft Windows NT Workstation | ||||
| Microsoft Windows Server 2003 Datacenter Edition | ||||
| Microsoft Windows 2000 Professional | ||||
| Microsoft Windows 2000 Server | ||||
| Microsoft Windows 2000 Datacenter Server | ||||
| Microsoft Windows 2000 Advanced Server | ||||
| Microsoft Windows 95/98 | ||||
| Microsoft® Windows® for x64 | ||||
A fix for this issue for SAS Formats Library for Teradata 1.8 is available at:
http://ftp.sas.com/techsup/download/hotfix/HF2/B61.html#45125A fix for this issue for SAS In-Database for Teradata on Linux is available at:
http://ftp.sas.com/techsup/download/hotfix/HF2/F96.html#45125| Type: | Problem Note |
| Priority: | high |
| Date Modified: | 2012-02-13 09:17:09 |
| Date Created: | 2011-12-13 08:12:43 |