• Issue 1: Template expects json with {#DN_NAME}, but receives {#DGNAME}
  Output coming from agent2 on discovery item ASM disk groups discovery:

  [{"{#DGNAME}":"FIRST"},{"{#DGNAME}":"SECOND"}]
  

  According to sources version 5 and 6 plugins creates json with "DGNAME"
  https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/src/go/plugins/oracle/handler_asm_diskgroups_discovery.go

• Issue2: Dependent values preprocessing expects wrong entity names:

  $..['{#DG_NAME}'].free_size_byte.first()

  $..['{#DG_NAME}'].used_percent.first()

  $..['{#DG_NAME}'].size_byte.first()

  data received from agent2 item Oracle: Get ASM stats:

  [{"FIRST":{"total_bytes":111111111,"free_bytes":22222222222,"used_pct":25.55}}
  

  Not a single match.
  free_size_byte != free_bytes
  used_percent != used_pct
  size_byte != total_bytes

Tested on Oracle 12 and 19