historical process open too many segments files(all segments files)

[lukoou3]

historical process open too many segments files(all segments files)

Affected Version

26.0.0.

Description

Cluster size: 2 query server, 22 data server

Discovered that the Druid Data server has a large number of opened files, historical process open too many files, historical process will open all segments files.

use lsof -p druid_historical_process_Id, discover historical process will open all segments files.

There are a total of 760k segments files, 34k segments files per data server, historical process will open 34k segments files.

why historical process will open all segments files?