HP EVA Cluster Extension Software Administrator Guide (5697-2445, July 2013)

• For CLX cmdlet logs, the CLXCmdlet.log file resides in:
%ProgramFiles%\Hewlett-Packard\Cluster Extension EVA\log\
• For each system, EVA Cluster Extension keeps its own log file in its default log location.
Log locationLog fileSystem
%HPCLX_EVA_PATH%\logclxevamscs.logWindows
clxevarun.logCLI
• EVA Cluster Extension messages can also be found in MSCS log file.
CAUTION: EVA Cluster Extension is not able to handle DR group states automatically and
correctly when they result from manual intervention or modifications to the DR group states.
Always disable automatic service or application/package failover when merging or
resynchronizing DR groups. A failure of the resynchronization source while resynchronizing
can lead to non-current data on the resynchronization target.
The resynchronization process copies data in transactional order, which means that you could
start your application with this data but it might be older than the source.
Start errors
• In Windows, generic startup or initialization logic errors can occur when the path to the EVA
Cluster Extension binaries has not been set in the PATH environment variable and the processes
(for example the cluster service) have not recognized the %HPCLX_EVA_PATH% variable. To
fix this problem, restart the cluster service.
• If an error occurs because the required components of EVA Cluster Extension are not available,
a file is generated that could help with troubleshooting. The file is clxlog.log. It may be
in any directory, but is usually in the working directory of the operating system
(%SYSTEMROOT%).
• EVA Cluster Extension returns a local error if any of the following occurs:
EVA Cluster Extension does not find the user configuration file for clxevarun in the
correct directory location.
◦
◦ An error occurs after initialization.
Failover error handling
EVA Cluster Extension automatically fails over if the system on which the application is running
becomes unavailable. This is done as part of the cluster functionality. This also means that if a
problem occurs with the EVA DR group state or the HP EVA SMI-S server, the application online
process is stopped.
EVA Cluster Extension is highly configurable. Depending on the customer setting, EVA Cluster
Extension is used to prevent applications from going online automatically under the wrong
conditions.
Therefore, EVA Cluster Extension returns local, data-center-wide, or even cluster-wide errors to
prevent accidental access to the vdisk(s).
Cluster Extension EVA resources (MSCS) return a data center error and fail the resource if the DR
group status indicates that the problem experienced locally would not be solved on another system
connected to the same EVA storage system. This means that all systems specified in the DC_A_Hosts
resource property or the DC_B_Hosts resource property would fail to bring the application online.
78 Troubleshooting