How many client connections are hitting your cluster? Have you looked at tuning connection pool? https://github.com/datastax/java-driver/tree/3.x/manual/pooling
-- Jacob Shadix On Mon, Jun 26, 2017 at 2:50 PM, Ivan Iliev <ivan.iliev.il...@gmail.com> wrote: > Hello everyone! > > I am seeing recent behavior of apps being not able to communicate to the > Cassandra cluster with the following errors: > > All host(s) tried for query failed (tried: cassandra2-test:9042 > (com.datastax.driver.core.exceptions.DriverException: Timeout while > trying to acquire available connection (you may want to increase the driver > number of per-host connections)), cassandra3-test:9042 > (com.datastax.driver.core.exceptions.TransportException: > [cassandra3-test/] Connection has been closed), cassandra1-test:9042 > (com.datastax.driver.core.exceptions.TransportException: > [cassandra1-test/] Connection has been closed)) > > I have enabled start_native_transport already but this does not fix the > problem. > > I would appreciate any feedback on the problem. > > Thanks, > Ivan >
