ONCplus B.11.31.14 Release Notes (5900-2268, April 2012)

For more information about the new tunables, see the Managing NFS and KRPC Kernel

Configurations in HP-UX 11i v3 whitepaper.

NOTE: This solution is implemented for NFS v3 only as of now. All NFS v3 filesystems have to

be unmounted if there is any change in these tunables or UFC filecache_max.

Workaround

For ONCplus B.11.31.13 and earlier versions, the workaround is to use the "forcedirectio"

option for the NFS mount.

Problem

When ONCplus B.11.31.12 is operating in the SRP environment, if the srp -stop command is

executed while there are active NFS mount points present in the SRP environment, it may hang

and a message similar to the following will be logged in the /var/adm/syslog/syslog.log

file:

vmunix: WARNING: SRP 13 shutdown called with 1 active NFS mounts. Waiting

for unmount to complete.

Cause

When the command is executed to shut down the SRP daemon, it may initiate the NFS client

shutdown while there are active NFS mount points present in the SRP environment. Due to this, the

srp -stop command may hang while waiting for the active NFS filesystems to unmount.

Workaround

• Before issuing the command, it is recommended to verify whether the NFS mount point in the

SRP environment is active, by executing the fuser -c command on the NFS mount point

from the global view of SRP.

# fuser -c /var/hpsrp/srp01/opt/nfstest

where:

/var/hpsrp/srp01/opt/nfstest is an NFS mount point under the SRP environment

srp01

This command displays the process ids (PIDs) of the active processes on the NFS mount point.

/var/hpsrp/srp01/opt/nfstest: 11352c

where:

11352 is the PID of the active process on the NFS mount point

If there are no active processes on the NFS mount point, then execute the command. Otherwise,

wait until there are no active processes.

• If the srp -stop command has already been executed and it hangs, force unmount all the

NFS filesystems under the SRP instance which is being shutdown.

# umount -f /var/hpsrp/srp01/opt/nfstest

This unblocks the srp -stop command and allows it to complete the operation.

NOTE: Doing a force unmount may cause data loss for open files. After the unmount is complete,

if a program tries to access files from an unmounted filesystem, it will get an EIO error.

For information on HP-UX SRP commands and HP-UX Containers, see the HP-UX Containers (SRP)

Administrator's Guide.

To locate this document, go to the following location on the HP Business Support Center: