What is the impact of failing to create a checkpoint?

OrientDB Version: v1.6.4

Java Version: Java 8

OS: Docker container on Linux OS

Expected behavior

I was running embedded OrientDB v.16.4 in Docker container when I got the following logs:
Storage OrientDB was not closed properly. Will try to restore from write-ahead log.
Try to find last checkpoint
Checkpoints are absent will restore from beginning
Date restore procedure is started
Storage data restore was completed
Wait till indexes restore after crash was finished.
I knew that only the OrientDB restore. I have research more docs about checkpoints. Anyway, I have 2 questions about checkpoints. Please give me answers for them.

  1. Has the fuzzy checkpoint been supported on v1.6.4?
  2. What is the impact of failing to create a checkpoint?
  3. When the checkpoint creation fails, it seems that some kind of recovery process is in progress. Is there such a process? (It is necessary to judge from official information such as documents.)