NullPointerException on 'heap' command

[tallpsmith]

First time I've seen this one, we're running ES 0.19.10

$ es -v heap

unexpected: {:throwable #, :object #, :message nil, :cause nil, :stack-trace #<StackTraceElement[] [Ljava.lang.StackTraceElement;@64a22671>}

java.lang.NullPointerException
at clojure.lang.Numbers.ops(Numbers.java:942)
at clojure.lang.Numbers.divide(Numbers.java:157)
at es.util.math$ratio.invoke(math.clj:5)
at es.util.math$percent.doInvoke(math.clj:10)
at clojure.lang.RestFn.invoke(RestFn.java:425)
at es.data.nodes$mem.invoke(nodes.clj:59)
at es.data.cluster$mem$iter__1641__1645$fn__1646.invoke(cluster.clj:94)
at clojure.lang.LazySeq.sval(LazySeq.java:42)
at clojure.lang.LazySeq.seq(LazySeq.java:60)
at clojure.lang.RT.seq(RT.java:475)
at clojure.core$seq.invoke(core.clj:133)
at clojure.core.protocols$seq_reduce.invoke(protocols.clj:30)
at clojure.core.protocols$fn__6062.invoke(protocols.clj:54)
at clojure.core.protocols$fn__6015$G__6010__6028.invoke(protocols.clj:13)
at clojure.core$reduce.invoke(core.clj:6149)
at clojure.core$into.invoke(core.clj:6196)
at es.data.cluster$mem.invoke(cluster.clj:90)
at es.command.heap$heap.invoke(heap.clj:20)
at clojure.lang.Var.invoke(Var.java:423)
at es.main$main.invoke(main.clj:39)
at es.main$_main$fn__1968.invoke(main.clj:52)
at es.main$_main.doInvoke(main.clj:45)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at es.main.main(Unknown Source)

[faxm0dem]

I've got the same on 'nodes'

[tallpsmith]

This was working fine for a long time, and then after adding in some more nodes (3->5 nodes) this started erroring again.

[faxm0dem]

That being said, I doubt this project will perdure with the advent of the _cat API