You're probably hitting this -
https://github.com/datastax/cpp-driver/blob/2.0/src/session.cpp#L740
>From my reading it feels you may want to throttle your queries or play around
>with the driver settings. Essentially it seems the number of queries you're
>issuing is greater than what the cluster can handle and therefore they're
>queuing up in the driver.
Dinesh
On Monday, November 19, 2018, 10:24:10 PM PST, [email protected]
<[email protected]> wrote:
Dear all,
I've got a 2 node Cassandra cluster(3.11.2). I'm using Datastax's c++
driver(ver 2.7) in my application to fetch/add data from the cluster(RHEL 6.9).
Sometimes I'm getting the error "All connections on all I/O threads are busy"
in my application. I'm unable to figure out why I am getting this error
infrequently and not everytime.
Has anyone faced such errors before? Please let me know any possible reasons
behind the issue.
Thanks and regards,
Vishal Sharma
P.S. I don't really know whether this is a Datastax driver's issue or
Cassandra's issue that's why I'm posting this query here.
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