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zhaozhao.zz authored
As we know if a module exports module-side data types, unload it is not allowed. This rule is the same with blocked clients in module, because we use background threads to implement module blocked clients, and it's not safe to unload a module if there are background threads running. So it's necessary to check if any blocked clients running in this module when unload it. Moreover, after that we can ensure that if no modules, then no module blocked clients even module unloaded. So, we can call moduleHandleBlockedClients only when we have installed modules.
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