Kihwal Lee created HDFS-15287:
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Summary: HDFS rollingupgrade prepare never finishes
Key: HDFS-15287
URL: https://issues.apache.org/jira/browse/HDFS-15287
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Affects Versions: 2.10.0, 3.3.0
Reporter: Kihwal Lee
After HDFS-12979, the prepare step of rolling upgrade does not work. This is
because it added additional check for sufficient time passing since last
checkpoint. Since RU rollback image creation and upload can happen any time,
uploading of rollback image never succeeds. For a new cluster deployed for
testing, it might work since it never checkpointed before.
It was found that this check is disabled for unit tests, defeating purpose of
testing.
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