I have just upgraded filebeat from 5.6.4 to 6.0.0 and logs are being flooded with: 2017/11/30 16:24:23.327596 client.go:465: WARN Can not index event (status=400): {"type":"mapper_parsing_exception","reason":"Failed to parse mapping [doc]: Mapping definition for [error] has unsupported parameters:…

quanta84 December 5, 2017, 7:32am 3

This fixed my problem: Filebeat v6 and elasticsearch v6

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