Web API /next returns status 500 if node is waiting to poll

[ktims]

When calling /next/<node> from an external service to notify Oxidized of config changes, the API sometimes responds with 500 Internal Server Error, particularly at startup.

Apparently this is due to the underlying next implementation only searching the list of nodes that aren't currently 'running' a poll job. If the node is currently 'running', then it will not be found, and this will raise which is not caught, not return nil/false which would be.

oxidized/lib/oxidized/nodes.rb

Line 72 in 9594ae1

return unless waiting.find_node_index(node)

[Haeki]

I noticed the same problem as well.
I implemented a fix that works in our oxidized installation