Splunk upgraded. The structure is a multi-site clustering, with seven indexers clustering. One of the indexers does not upgrade. Upgrades were done from 6.4.3 to 6.4.5, 6.4.6 and 6.4.7 In all versions, the following logs are generated and are not upgraded. WARN We must upgrade IDX_16, but we were failed. we saw the message("WARN CMMasterProxy - Master is down! Make sure pass4SymmKey is matching if master is running.") Entered pass4SymmKey correctly. Recovering back to 6.4.3 will work normally. If you have experienced the same phenomenon, please respond. thank you. ... View more