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From Andrew <>
Subject Re: too many open files
Date Sat, 09 Aug 2014 15:59:20 GMT

I’ll see if I can reproduce this on a local instance, but just in case, the error was basically—instead
of storing the session in my connection factory, I stored a cluster and called “connect”
each time I requested a Session.  I had defined a max/min number of connections for the connection
itself, maxing out at 128 local/remote.  I’m not sure if a Session results in a new file
handle on the server side, but I saw the same issue (hundreds of thousands of sockets opened
on the server).

The cluster was also using hsha; most of the other settings were default in 2.0.7.


On August 8, 2014 at 4:08:50 PM, Tyler Hobbs ( wrote:

On Fri, Aug 8, 2014 at 5:52 PM, Redmumba <> wrote:
Just to chime in, I also ran into this issue when I was migrating to the Datastax client.
Instead of reusing the session, I was opening a new session each time. For some reason, even
though I was still closing the session on the client side, I was getting the same error.

Which driver?  If you can still reproduce this, would you mind opening a ticket? (

Tyler Hobbs

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