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<a href="https://github.com/tarantool/tarantool/commit/<a class=hub.com/tarantool/tarantool/commit/ac80084527a46cd8355b940918a9819fc4901785">ac8008452<a href="https://github.com/tarantool/tarantool/commit/ac80084527a46cd8355b940918a9819fc4901785">&quot;&gt;box: enable WAL before making initial checkpoint

While a replica is bootstrapped from a remote master, vinyl engine
may need to perform compaction, which means that it may write to
the _vinyl_deferred_delete system space. Compaction proceeds fully
asynchronously, i.e. a write may occur after the join stage is
complete, but before the WAL is initialized, in which case the new
replica will crash. To make sure a race like that won&amp;#39;t happen, let&amp;#39;s
setup WAL before making the initial checkpoint. The WAL writer is now
initialized right before starting the WAL thread and so we don&amp;#39;t need
to split WAL struct into the thread and the writer anymore.

Closes #3968

(cherry picked from commit </a><a class="double-link" href="https://github.com/tarantool/tarantool/commit/<a class="double-link" href="https://github.com/tarantool/tarantool/commit/c67430381cd356e90b57b8e02e57b51ada496198">c67430381</a>">c67430381</a><a href="https://github.com/tarantool/tarantool/commit/ac80084527a46cd8355b940918a9819fc4901785">)

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