HP StorageWorks P9000 Performance Advisor Software v5.3 User and Troubleshooting Guide (T1789-96322, August 2011)

Unable to connect to the real-time server on the host agent
If you are not able to connect to the real-time server on a host agent, one of the following error
messages are displayed:
• Performance Advisor could not recognize the Real Time Server on the
host agent <host agent name>. This could be due to the Real Time Server
not running on the selected host agent or the host agent name is not
found.
• Error occurred while connecting to Real Time Server. This could be due
to the Real Time Server not running on the host agent, or the same host
agent is already being used for real time collection by another instance
of Performance Advisor.
It may be due to the following reasons:
• Real-time service is not running on the selected host agent.
• P9000 Performance Advisor host agent is not responding to your requests, as the specified host
name does not exist.
• Check if another user accessing the same management station has triggered another real-time
performance data collection. If you try to connect to a host agent that is already collecting the
real-time data initiated through another instance of P9000 Performance Advisor, the existing
connection is discontinued and the above-mentioned error message is displayed.
To overcome the issue, perform the following steps:
1. Verify if the real-time server (HP P9000 Performance Advisor RealTime Server) is running on the
host. Restart the service if it has stopped.
Additionally, if it is a Linux or Unix host agent, check for the following entry under /etc/hosts:
127.0.0.1 <Server HostName> localhost.localdomain localhost. If the above-
mentioned entry is present, do the following to resolve the issue:
a. Stop the Web NMS server.
b. Remove the entry <Server HostName> from /etc/hosts. Following should be the entry:
127.0.0.1 localhost.localdomain localhost
c. Restart the network of the server by executing the following commands from /etc/hosts/
rc.d/init.d directory:
• ./network stop
• ./network start
d. Start the Web NMS server and connect the client again.
2. Verify if the host agent name displayed in P9000 Performance Advisor is correct. It appears in
the HostAgent list on the RealTimeChart screen.
You can also ping the host agent to check if it is responding to your requests. The host agent
name should be the same as displayed under HostAgent in the RealTimeChart screen.
Also, verify if there is a correct mapping of the IP address to the host name. You can find this
mapping information in the <Install_drive>:\Windows\System32\drivers\etc\hosts
file on your management station. If the mapping between the IP address and the corresponding
host name is incorrect, edit the hosts file to replace the existing IP address with the new one
and save the changes. Ensure that the IP address and the host name are separated by a space.
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