On Mon, 2019-09-23 at 10:39 +0000, Братухин Никита Романович wrote:
> Hey there, recently we have been using this beautiful lib for our
> internal microservices communication, but I have some question about
> max connection count.
> What will happen when max count of connections will be used?
> For example, if  PoolingHttpClientConnectionManager has maximum 200
> of connections
> cm.setMaxTotal(200);
> and all of them are used, what will happen then client should execute
> another request, which will require 201 connection?

Доброго вам дня.

The thread executing the request will get blocked until a connection
becomes available in the pool or `connectionRequestTimeout` expires.


> Will it throw error or will some of the active connections closed (
> for example some LRU/LFU logic) ?

Several outcomes are possible:

1. If a persistent connection gets released back to the pool manager it
will be re-used and served to a pending connection lease request for
the same route.

2. If a closed connection for any route or a persistent connection for
a different route gets released back to the pool the pool manager will
discard the old connection and open a new connection for the next
pending connection request. 

3. `ConnectionPoolTimeoutException` is thrown if
the `connectionRequestTimeout` expires with no connection released back
to the pool manager.

Hope this helps

Oleg


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  • max total connections Братухин Никита Романович
    • Re: max total connec... Oleg Kalnichevski

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