Bad file descriptor when I do the snapshot

Elastic Stack Elasticsearch
1

Elasticsearch version is 6.3.0，when I do the snapshot，there was always an error.

"reason": "IndexShardSnapshotFailedException[Failed to perform snapshot (index files)]; nested: IOException[错误的文件描述符]; "

If I keep deleteing the snapshot file and repeating it several times, it may be successful finally. What can result in it ?

3

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