In FusionInsight,How does Management Node fault impact the system

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?If one management node is faulty, active/standby failover occurs in all the major processes on the node, and an active/standby failover alarm and a node fault alarm are generated. For details on the system impact, see Alarm handling.
?When one more management node is faulty, the service is seriously affected. Stop all services that are running and rectify the fault immediately.

Other related questions:
In FusionInsight,How to handle Management Node fault
1.If only one management node is faulty, handle the alarm based on the handling procedure of "ALM-12006 Node Fault." 2.If two management nodes are faulty but FusionInsight Manager can be accessed properly, the following alarms are reported:a.ALM-12006 Node Fault b.Active/standby Component Failover c.Service Unavailable Handle alarms a, b, and c in sequence. If the alarm persists after handling a and b,replacing a Faulty Node to resolve the problem. 3.If FusionInsight Manager cannot be accessed properly, contact the administrator to rectify hardware, network, and OS faults. If the fault persists, contact technical support; otherwise, go to 2.

In FusionInsight,How does Service Node Faulty impact on the system.
?The DataNode service is installed on service nodes by default. If less than three service nodes are lost, the service is not affected, but the service response time prolongs. You need to rectify the fault promptly. ?If more than three service nodes are lost, files stored in the Hadoop distributed file system (HDFS) may be lost and the service can be affected. You are advised to stop all service reading operations and rectify the fault immediately.

In FusionInsight,What is the impact on system of ALM-12033 Slow Disk Fault
Service performance deteriorates and service processing capabilities become poor. For example, DBService active/standby synchronization is affected and even the service is unavailable.

In FusionInsight,What is the impact on system of Alarm 12011 Manager Data Synchronization Exception Between the Active and Standby Nodes
Some configurations will be lost after an active/standby switchover because the configuration files on the standby Manager are not updated. Maybe the Hive, Oozie, and Manager cannot run properly.

In FusionInsight,What is the impact on system of Alarm 12008 Hard Disk Drive Fault
Data on the disk is inaccessible, and the system cannot operate properly.

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