10.5. Cluster Services Hang
- The cluster may have attempted to fence a node and the fence operation may have failed.
- Look through the
/var/log/messagesfile on all nodes and see if there are any failed fence messages. If so, then reboot the nodes in the cluster and configure fencing correctly.
- Verify that a network partition did not occur, as described in 節 10.8, “Each Node in a Two-Node Cluster Reports Second Node Down”. and verify that communication between nodes is still possible and that the network is up.
- If nodes leave the cluster the remaining nodes may be inquorate. The cluster needs to be quorate to operate. If nodes are removed such that the cluster is no longer quorate then services and storage will hang. Either adjust the expected votes or return the required amount of nodes to the cluster.
fence_nodecommand or with Conga. For information, see the
fence_nodeman page and 節 5.3.2, “Causing a Node to Leave or Join a Cluster”.