Failed to delete index

Elasticsearch 5.6.5 failed to delete index

delete an index by curl-XDELETE . The index is created by scheduled tasks every day, a single index file of about 200g, a total of two nodes.

result Elasticsearch returns {"acknowledged": "false"} .

through curl _ cat/indices?v , the index no longer exists, but the data file is still on disk.

question
  1. what is the deletion process?
  2. Why does this happen and how to avoid it
  3. if this happens, what should we do next

@ Game @ kyle

Thank you

Jan.25,2022
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1be618b-39b8a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be618b-39b8a.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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