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From "Miroslaw Partyka (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-8989) Reading from table which contains collection type using token function and with CL > ONE causes overwhelming writes to replicas
Date Wed, 18 Mar 2015 16:16:38 GMT
Miroslaw Partyka created CASSANDRA-8989:
-------------------------------------------

             Summary: Reading from table which contains collection type using token function
and with CL > ONE causes overwhelming writes to replicas
                 Key: CASSANDRA-8989
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8989
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Miroslaw Partyka


When reading from a table at the aforementioned conditions, each read from replica also casues
write to the replica. 

Confimed in version 2.0.12 & 2.0.13, version 2.1.3 seems ok.

To reproduce:

CREATE KEYSPACE test WITH replication = {'class': 'NetworkTopologyStrategy', 'DC1': 2};
USE test;
CREATE TABLE bug(id int PRIMARY KEY, val map<int,int>);
INSERT INTO bug(id, val) VALUES (1, {2: 3});
CONSISTENCY LOCAL_QUORUM
TRACING ON
SELECT * FROM bug WHERE token(id) <= 0;

trace contains twice:
Appending to commitlog
Adding to bug memtable




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