POST on _mapping endpoint fails with NPE

[jprante]

ES 1.3.4

The following command makes not much sense, but it fails with an NPE.

POST /alias/type/_mapping

Result

{
   "error": "RemoteTransportException[[Kierrok][inet[/10.3.2.31:19300]][indices/mapping/put]]; nested: NullPointerException; ",
   "status": 500
}

where alias is an index alias.

No error in the server logs.

[clintongormley]

The same thing happens with an index instead of an alias. The NPE seems to come from the missing body.

[rjernst]

This was fixed in #7618 and is in 1.4.