What does priority 0 mean in a JSRP chassis cluster?

The show chassis cluster status command shows priority as 0 for a redundancy group.

{primary:node0}
root@SRX> show chassis cluster status
Cluster ID: 3
Node                  Priority          Status    Preempt  Manual failover

Redundancy group: 0 , Failover count: 1
    node0                   129         primary        no       no 
    node1                   128         secondary      no       no 

Redundancy group: 1 , Failover count: 3
    node0                   0           primary        no       no 
    node1                   0           secondary      no       no 

Priority 0 means that the node is in the ineligible state. There are several reasons why you could see the ineligible state:

    Cold sync failure
    Monitored interface down
    IP Tracking is failing (SRX3000 and SRX5000)
    Possible hardware issue


Perform the following to correct the priority 0 state:

    Check chassis cluster statistics. Are there any missing heartbeats or probes?
    Check chassis cluster interfaces. Are any of the monitored interfaces down or is a tracked IP missed?
    Check jsrpd logs. Are there any errors?
    Check chassisd logs.  Is any hardware down?
    Check messages log. Are there any events leading up to the problem?

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