"memcached server module flush_all command cannot be in the middle of pipelined command input.
(this is probably tightly connected to
JBPAPP-5439, but manifests itself in different scenario as well)
$ echo -e "flush_all\r\nget a" | nc localhost 11211
SERVER_ERROR org.infinispan.server.core.ServerException: java.lang.NumberFormatException: For input string: "get"