[jira] [Created] (HDDS-7885) OFS CLI fail to copy form srouce bucket to destination bucket if destination bucket doesn't exist

["Hemant Kumar (Jira)" <ji...@apache.org>]

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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