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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-10020) Support eager retries for range queries
Date Fri, 07 Aug 2015 21:28:45 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-10020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-10020:
---------------------------------------
      Priority: Minor  (was: Critical)
    Issue Type: New Feature  (was: Bug)
       Summary: Support eager retries for range queries  (was: Range queries don't go on all
replicas. )

> Support eager retries for range queries
> ---------------------------------------
>
>                 Key: CASSANDRA-10020
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10020
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Gautam Kumar
>            Priority: Minor
>
> A simple query like `select * from table` may time out if one of the nodes fail.
> We had a 4-node cassandra cluster with RF=3 and CL=LOCAL_QUORUM. 
> The range query is issued to only two as per ConsistencyLevel.java: liveEndpoints.subList(0,
Math.min(liveEndpoints.size(), blockFor(keyspace)));
> If a node fails amongst this sublist, the query will time out. Why don't you issue range
queries to all replicas? 



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