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In order to be able to avoid a deadlock when CQL server cannot be started, the view builder shutdown procedure is now split to two parts - - drain and stop. Drain is performed before storage proxy shutdown, but stop() will be called even before drain is scheduled. The deadlock is as follows: - view builder creates a reader permit in order to be able to read from system tables - CQL server fails to start, shutdown procedure begins - view builder stop() is not called (because it was not scheduled yet), so it holds onto its reader permit - database shutdown procedure waits for all permits to be destroyed, and it hangs indefinitely because view builder keeps holding its permit.