increment findCacheMiss when the findCache is empty
increment findCacheMiss when the findCache is empty

raintank/raintank-metric,raintank/metrictank,replay/metrictank,raintank/raintank-metric,raintank/metrictank,replay/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/metrictank,raintank/raintank-metric