Humans are adept at reflection, especially after experiencing "pain close to the skin." The escalating wave of revolution made rulers realize the danger.
The cultural tradition in Austria tends toward conservatism, and the losses in the economic crisis were not significant, so social contradictions were relatively ease, which meant the influence of the revolutionary wave was less pronounced.
Several domestic disturbances that erupted involved international forces, and the people's revolutionary will was not strong. The Vienna Government's sense of crisis was not too intense.
While Franz was still considering whether to convene an international conference, Napoleon IV had already issued a call to all countries in Europe.
There was no way around it, for the revolutionary fervor of the Parisians was too high. The whole city was like a powder keg, where a single spark could ignite a revolution.