| 摘要 |
A network monitor program operating in each node included in a cluster system, for causing the node to execute: when a response to an existence confirmation message from a relay apparatus, which relays a business request to the node, could not be received, obtaining status data of other nodes included in the cluster system; when the status data of the other nodes represents that one of the other nodes is in a usable state, confirming whether or not the node in the usable state can communicate with the relay apparatus; and when it is confirmed that the node in the usable state can communicate with the relay apparatus, notifying a cluster manager of an occurrence of a communication failure.
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