The current thread has entered read mode, so trying to enter the lock in write mode would create the possibility of a deadlock.
目前执行绪已进入读取模式，因此尝试进入写入模式锁定可能会造成死结。
The current thread has entered read mode, so trying to enter the lock in write mode would create the possibility of a deadlock.
目前执行绪已进入读取模式，因此尝试进入写入模式锁定可能会造成死结。
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