Hemant Kumar created HDDS-7885:
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Summary: OFS CLI fail to copy form srouce bucket to destination
bucket if destination bucket doesn't exist
Key: HDDS-7885
URL: https://issues.apache.org/jira/browse/HDDS-7885
Project: Apache Ozone
Issue Type: Bug
Components: OM
Reporter: Hemant Kumar
Snapshot restore tests were added as part of
[PR|https://github.com/apache/ozone/pull/4148/files#diff-2186b1fe62df6e3d2018bb4a9491761f79cff48e1ea81c3d50f85cd5f5bda7c7R256)]
and test to restore snapshot to another bucket fails sometime for *_Legacy
bucket_* layout with exception *_File Exists._* In the deep dive, it was found
that it is because of [PR|https://github.com/apache/ozone/pull/4038]. In the
PR, [seek operation was used on RocksDB
table|https://github.com/apache/ozone/pull/4038/files#diff-bde0dade7dd5ddda419499f4f999d25d40fcec1412e0ce809c36ffd1be473f22R1302-R1304]
which sometime returns non-null response and causes fake dir creation. It is
possible that RocksDB's seek operation uses bloom filter which doesn't
guarantee that key exists (false positive).
To fix this, we should add volume and bucket check
[here|https://github.com/apache/ozone/pull/4038/files#diff-bde0dade7dd5ddda419499f4f999d25d40fcec1412e0ce809c36ffd1be473f22R1306].
We may or may not need to iterate over the iterator.
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