Error in call to query when pool is full

[jmendezm]

Avoid error in function eredis_cluster_pool_worker:query() when poolboy return full instead of a Worker PID because pool is full

[zuiderkwast]

Actually, poolboy:transaction/2 is using poolboy:checkout/3 with Block = true. This means that the atom 'full' is not returned. Thus, I think this PR can be closed.

Instead, if the pool is full, the call to poolboy:transaction/2 is blocking. When it times out, it causes an exit:{timeout, {gen_server, call, _}} exception which is converted to {error, no_connection} by the try-catch in eredis_cluster_pool. This causes a refresh mappings and then a retry. The refresh mappings is unnecessary in this case. We have a fix for that here: Nordix#27.