A member of my server produced some firework rockets using more paper and gunpowder than charges on top, then used shift-click. This consumed all resources on the crafting grid.

When he then attempted to launch the firework he was disconnected (with disconnect.genericReason shown in the server log and Connection Lost - End of Stream on the client) and any attempts to reconnect failed with the same errors both in the sever log and on the client. Restarting the server resolved the issue, however upon attempting to launch a firework the problem repeated.