OK.
Seems to work partly now.
Reverted to elasticsearch output plugin and set the 'action'to "create" (i.s.o.the default 'index')
I recieve data now.
Hoewever, I see these to lines in logstash log:
[2020-09-30T16:19:25,834][WARN ][logstash.outputs.elasticsearch][main][ef8f8fd38026ee6b4cb399a9d9dcfe8440065e0aca25750d4cb1f8bb8192b208] Failed action. {:status=>409, :action=>["create", {:_id=>"19319400d8fbb7c0069c70df9b178ccc3860dc2d", :_index=>"agl-api-ds", :routing=>nil, :_type=>"_doc"}, #<LogStash::Event:0x13738519>], :response=>{"create"=>{"_index"=>".ds-agl-api-ds-000001", "_type"=>"_doc", "_id"=>"19319400d8fbb7c0069c70df9b178ccc3860dc2d", "status"=>409, "error"=>{"type"=>"version_conflict_engine_exception", "reason"=>"[19319400d8fbb7c0069c70df9b178ccc3860dc2d]: version conflict, document already exists (current version [1])", "index_uuid"=>"h9zN5pZvSgm8ltTfdXesRg", "shard"=>"0", "index"=>".ds-agl-api-ds-000001"}}}}
[2020-09-30T16:19:33,327][WARN ][logstash.outputs.elasticsearch][main][ef8f8fd38026ee6b4cb399a9d9dcfe8440065e0aca25750d4cb1f8bb8192b208] Failed action. {:status=>409, :action=>["create", {:_id=>"0645733540c1642af821aa78a270114dbe1603e1", :_index=>"agl-api-ds", :routing=>nil, :_type=>"_doc"}, #<LogStash::Event:0x16b63ce6>], :response=>{"create"=>{"_index"=>".ds-agl-api-ds-000001", "_type"=>"_doc", "_id"=>"0645733540c1642af821aa78a270114dbe1603e1", "status"=>409, "error"=>{"type"=>"version_conflict_engine_exception", "reason"=>"[0645733540c1642af821aa78a270114dbe1603e1]: version conflict, document already exists (current version [1])", "index_uuid"=>"h9zN5pZvSgm8ltTfdXesRg", "shard"=>"2", "index"=>".ds-agl-api-ds-000001"}}}}
How can I prevent these?