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As the ZooKeeper docs make clear, there are a number of "recoverable" exceptions that clients must deal with. In particular, ConnectionLossException and SessionExpiredException. Good ZooKeeper client applications are designed to account for failure. Your ZooKeeper ensemble will experience connection problems in production. Therefore, so should your recipes should account for this. A retry mechanism that catches ConnectionLossException, etc. and retries operations as appropriate is highly advised.