More info with detailed explanation: 
https://www.instaclustr.com/apache-cassandra-scalability-allow-filtering-partition-keys/

Dinesh

> On Apr 16, 2019, at 11:24 PM, Mahesh Daksha <[email protected]> wrote:
> 
> Hi, 
> 
> how much data you are trying to read in the single query? is it large in size 
> or normal text data.
> Looking at the exception it seems the node is unable to deliver data within 
> stipulated time. I have faced similar issue with the response data in huge in 
> size (some binary data). But it was solved as we spread the data across 
> multiple rows.
> 
> Thanks,
> Mahesh Daksha
> 
> On Wed, Apr 17, 2019 at 11:42 AM Krishnanand Khambadkone 
> <[email protected]> wrote:
> Hi,  I have a single instance cassandra server.  I am trying to execute a 
> query with ALLOW FILTERING option.  When I run this same query from cqlsh it 
> runs fine but when I try to execute the query through the java driver it 
> throws this exception.  I have increased all the timeouts in cassandra.yaml 
> file and also included the read timeout option in the SimpleStetement query I 
> am running.  Any idea how I can fix this issue.
> Caused by: com.datastax.driver.core.exceptions.ReadTimeoutException: 
> Cassandra timeout during read query at consistency LOCAL_ONE (1 responses 
> were required but only 0 replica responded)
> 
> 


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