guanfeix

This is some part of log,because of log level limits maybe not so detailed [couch-5985.log](https://github.com/apache/couchdb/files/8231698/couch-5985.log)

I try stop the replicate, delete the dpl_job.compact,restart couchdb. catch the log [Mon, 14 Mar 2022 02:55:56 GMT] [info] [] Starting compaction for db "dpl_job" [Mon, 14 Mar 2022 02:55:56...

> It looks like the compactor is failing to compact the database. It's hard to say immediately why, but behaves as if the documents appeared in the sequence index but...

> Thanks for trying on 1.7. One last possible thing to try could be to replicate the database to a new database. If that fails as well, and there is...

> Do you have any document attachments in that database, or any views that emit a lot of rows and/or data, or a lot of deleted/removed documents? I think those...