Ethan Rose created HDDS-12988:
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Summary: Expand reconciliation unit test framework
Key: HDDS-12988
URL: https://issues.apache.org/jira/browse/HDDS-12988
Project: Apache Ozone
Issue Type: Sub-task
Reporter: Ethan Rose
HDDS-12980 added a unit test framework for reconciliation using a mocked
datanode client. We can expand this framework to test even more cases:
* Mock network exceptions in the client to test unreachable peers
** Make sure errors retrieving the tree or chunks with one peer do not affect
reconciling with other peers.
* Use the mock client to corrupt data "in-flight" and test that it is not
ingested due to read checksum failure, even if the peer's tree reported it as
healthy.
* Add tests for deleted block handling to this suite. We currently have unit
tests for this in other places as well.
* Add tests where all blocks in the replicas are identical, and various
replicas are missing the same number of different blocks.
** Merkle tree hash needs to include the block ID to account for this, since it
will not cause a divergence in the hash if only data is used.
* Test when multiple rounds of reconciliation are required due to holes.
** Currently we cannot repair around holes in a container, so depending on the
order peers are reconciled, some replicas may require another round before all
replicas are matching
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