APAR status
Closed as program error.
Error description
Error Message: com.ibm.cuda.CudaException: invalid device context . Stack Trace: N/A .
Local fix
Ensure that the first use of CUDA4J made by any particular thread is not via one of these functions. CudaDevice.canAccessPeer() CudaDevice.disablePeerAccess() CudaDevice.enablePeerAccess() CudaDevice.getAttribute() For example, using CudaDevice.getFreeMemory() will ensure a valid device context.
Problem summary
Each thread requires a valid CUDA device context for certain interactions with a GPU. When a thread uses the CUDA4J API, the context will be initialized as necessary. A successful use of any of the following CudaDevice functions was incorrectly marking the context as valid causing to the initialization to be omitted in other places where it was required. CudaDevice.canAccessPeer() CudaDevice.disablePeerAccess() CudaDevice.enablePeerAccess() CudaDevice.getAttribute()
Problem conclusion
The code which tracks the validity of device contexts has been corrected. . This APAR will be fixed in the following Java Releases: 8 SR3 (8.0.3.0) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV82940
Reported component name
J9 COMMON CODE
Reported component ID
620700127
Reported release
270
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2016-03-23
Closed date
2016-03-23
Last modified date
2016-03-23
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
J9 COMMON CODE
Fixed component ID
620700127
Applicable component levels
R270 PSY
UP
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSNVBF","label":"Runtimes for Java Technology"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]
Document Information
Modified date:
22 February 2022