: Thursday, December 14, 2017 3:18 AM
To: user@cassandra.apache.org
Subject: [EXTERNAL] Lots of simultaneous connections?
Hi -
We’re finally putting our new application under load, and we’re starting to get
this error message from the Python driver when under heavy load:
('Unable to connect to any
Yep. With those kind of numbers you're likely overwhelming the cluster with
connections. You be better off if you can configure it to have either 1
connection per machine, or at least 1 connection per test. Creating lots of
connections is definitely not a good idea, and remember that each
Hi Kurt, thanks for your reply — really appreciate your (and everyone else’s!)
continual assistance of people in the C* user community.
All of these clients & servers are on the same (internal) network, so there is
no firewall between the clients & servers.
Our C* application is a QA test
I see time outs and I immediately blame firewalls. Have you triple checked
then?
Is this only occurring to a subset of clients?
Also, 3.0.6 is pretty dated and has many bugs, you should definitely
upgrade to the latest 3.0 (don't forget to read news.txt)
On 14 Dec. 2017 19:18, "Max Campos"
Hi -
We’re finally putting our new application under load, and we’re starting to get
this error message from the Python driver when under heavy load:
('Unable to connect to any servers', {‘x.y.z.205':
OperationTimedOut('errors=None, last_host=None',), ‘x.y.z.204':
