Re: " Too many open files" exception while spinning Cassandra connections

[Denis DEBARBIEUX]

Hi,

You can also share the session between many queries. Avoid to create one 
session per tuple.

Denis

Le 28/07/2015 15:51, Ajay a écrit :
Hi Nitin,

In Cassandra documentation[1], it is mentioned to increase the number 
of open files using ulimit which is a system (Linux) level setting.

1) 
http://docs.datastax.com/en/cassandra/2.0/cassandra/install/installRecommendSettings.html

Thanks
Ajay


On Tue, Jul 28, 2015 at 7:13 PM, nitin sharma 
<kumarsharma.ni...@gmail.com <mailto:kumarsharma.ni...@gmail.com>> wrote:

    HI,

    Has anyone worked on Storm - Cassandra setup? in my project Storm
    bolt will inject messages to Cassandra using Datax driver.

    We have observed that a single bolt executor thread is able to
    provide a throughput of 16 transactions per sec.. I.e - a single
    bolt executor thread is able to handle 16 tuple messages, process
    them and write to Cassandra in 1 sec.

    to meat our load requirement, we need nearly 100 executor thread..
    But our problem is that after 32 executor thread, we start getting
    following error message while deploying the Storm topology..

    “java.net.SocketException: Too many open files”

    Has anyone faced this issue earlier? any suggestions?


    Regards,
    Nitin Kumar Sharma.





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