Oracle RAC19C，兩個節點安裝成功，重啟后發現兩個節點的集群互相識別不到對方的集群狀態，都認為自己才是僅有的活躍節點，節點1和節點2的crs先后重啟成功，但是兩個VIP和SCAN IP只會集中在先啟動的那個節點上，而且不能正確識別到對方節點的VIP、SCAN IP狀態，實例狀態也識別異常。

就是分裂的感覺，分別處于不同的集群中。

環境：vmware搭建的虛擬環境，rhel7.5 + ORACL19.3

請問：

1、引起這個問題的原因怎么排查？

2、oracle rac是通過什么來判斷N個節點是處于同一個集群中的？

PRVG-10466 : Failed to determine cluster node roles. Verification will proceed considering nodes “rhel75h2” as hub nodes.

PRCI-1108 : Failed to check CRS running state for CRS home /oracle/app/19.3.0/grid/product/db_1 on node rhel75h2

CRS-4535: Cannot communicate with Cluster Ready Services

CRS-4529: Cluster Synchronization Services is online

CRS-4533: Event Manager is online

2021-03-13 23:36:47.026 [CVUD(51770)]CRS-10051: CVU found following errors with Clusterware setup : PRVG-10466 : Failed to determine cluster node roles. Verification will proceed considering nodes “rhel75h2” as hub nodes.

PRCI-1108 : Failed to check CRS running state for CRS home /oracle/app/19.3.0/grid/product/db_1 on node rhel75h2

CRS-4535: Cannot communicate with Cluster Ready Services

CRS-4529: Cluster Synchronization Services is online

CRS-4533: Event Manager is online

總結

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