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Michał Kępień authored
The "mirror" system test checks whether log messages announcing a mirror zone coming into effect are emitted properly. However, the helper functions responsible for waiting for zone transfers and zone loading to complete do not wait for these exact log messages, but rather for other ones preceding them, which introduces a possibility of false positives. This problem cannot be addressed by just changing the log message to look for because the test still needs to discern between transferring a zone and loading a zone. Add two new log messages at debug level 99 (which is what named instances used in system tests are configured with) that are to be emitted after the log messages announcing a mirror zone coming into effect. Tweak the aforementioned helper functions to only return once the log messages they originally looked for are followed by the newly added log messages. This reliably prevents races when looking for "mirror zone is now in use" log messages and also enables a workaround previously put into place in the "mirror" system test to be reverted.
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