Troubleshooting Oracle Exadata X5 db instance mount fail with ORA-01105 & ORA-01154

最近一个Oracle Exadata x5 2节点RAC 11.2.0.4环境,每个节点中有2套DB实例。 Node1正常运行,计划性重启Node 2后,CRS启动正常,主机上1个db的 instance 2启动正常, 但另1个db的node2 db instance启动失败,提示下面的错误:
ORA-01105: mount is incompatible with mounts by other instances
ORA-01154: database busy. Open, close, mount, and dismount not allowed now

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