Even though, #9681 and #9717 adds support to keep FST offheap for default codec, there are many other codecs which do not support FST offheap. Few examples are below:
CompletionPostingsFormat
BlockTreeOrdsPostingsFormat
IDVersionPostingsFormat
Migrated from LUCENE-8783 by Ankit Jain, updated Dec 08 2021
Even though, #9681 and #9717 adds support to keep FST offheap for default codec, there are many other codecs which do not support FST offheap. Few examples are below:
Migrated from LUCENE-8783 by Ankit Jain, updated Dec 08 2021