12-24-2019
You lost all heartbeats from node 1 to node 2 - thats the reason for the crash. This might happen when your system is simply too busy - but since you should have both heartbeat on disk and heartbeat via network, you should think that there is time enough to send at least one every couple of seconds, Your cluster heartbeat settings might be too tight - giving it more time for the heartbeat might help preventing this issue in the future.
Just out of curiosity - using GPFS and HACMP and RAC on the same systems appears to me to be a completely unnecessary setup, as you are running essentially 3 different cluster products on a system when RAC alone would suffice. Why ?
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cm(5) File Formats Manual cm(5)
NAME
cm - cluster monitor for high availability clusters
Remarks
Cluster operations require the installation of the optional Serviceguard or Serviceguard Extension for RAC software, which is not included
in the standard HP-UX operating system.
DESCRIPTION
Serviceguard and Serviceguard Extension for RAC are high availability products which provide an environment such that after a failure of a
node, services (applications) can be up and running again on another node within a very short amount of time. In addition, Serviceguard
Extension for RAC is the enabling software for the Real Application Clusters (RAC). Working with the basic Serviceguard product, Service-
guard Extension for Faster Failover allows configuration of clusters for optimized failover.
Commands
The following set of commands is used to configure a high availability cluster:
cmquerycl(1M)
cmmakepkg(1M)
cmcheckconf(1M)
cmapplyconf(1M)
The following commands are used to run or halt a cluster:
cmruncl(1M)
cmhaltcl(1M)
cmrunnode(1M)
cmhaltnode(1M)
cmviewcl(1M)
Once a cluster is formed, the following commands are provided for manual operation on high availability packages:
cmrunpkg(1M)
cmhaltpkg(1M)
cmmodpkg(1M)
The following commands are used within a package control script to control the services and networks configured for a package:
cmrunserv(1M)
cmhaltserv(1M)
cmmodnet(1M)
A command is provided to aid in migrating from a SwitchOver/UX configuration to a Serviceguard cluster:
cmmigrate(1M)
This command is not applicable with Serviceguard Extension for RAC.
SEE ALSO
Managing Serviceguard.
Configuring RAC Clusters with Serviceguard Extension for RAC.
Requires Optional Serviceguard Software cm(5)