User guide

D–Troubleshooting
OpenFabrics and InfiniPath Issues
IB0054606-02 A D-7
Manual Shutdown or Restart May Hang if NFS in Use
If you are using NFS over IPoIB and use the manual /etc/init.d/openibd
stop (or restart) command, the shutdown process may silently hang on the
fuser command contained within the script. This is because fuser cannot
traverse down the tree from the mount point once the mount point has
disappeared. To remedy this problem, the fuser process itself needs to be killed.
Run the following command either as a root user or as the user who is running the
fuser process:
# kill -9 fuser
The shutdown will continue.
This problem is not seen if the system is rebooted or if the filesystem has already
been unmounted before stopping infinipath.
Load and Configure IPoIB Before Loading SDP
SDP generates Connection Refused errors if it is loaded before IPoIB has been
loaded and configured. To solve the problem, load and configure IPoIB first.
Set $IBPATH for OpenFabrics Scripts
The environment variable $IBPATH must be set to /usr/bin. If this has not been
set, or if you have it set to a location other than the installed location, you may see
error messages similar to the following when running some OpenFabrics scripts:
/usr/bin/ibhosts: line 30: /usr/local/bin/ibnetdiscover: No
such file or directory
For the OpenFabrics commands supplied with this InfiniPath release, set the
variable (if it has not been set already) to /usr/bin, as follows:
$ export IBPATH=/usr/bin
SDP Module Not Loading
If the settings for debug level and the zero copy threshold from InfiniPath
release 2.0 are present in the release 2.2 /etc/modprobe.conf file (RHEL) or
/etc/modprobe.conf.local (SLES) file, the SDP module may not load:
options ib_sdp sdp_debug_level=4
sdp_zcopy_thrsh_src_default=10000000
To solve the problem, remove this line.