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From "Benedict (JIRA)" <>
Subject [jira] [Resolved] (CASSANDRA-14702) Cassandra Write failed even when the required nodes to Ack(consistency) are up.
Date Fri, 07 Sep 2018 10:15:00 GMT


Benedict resolved CASSANDRA-14702.
    Resolution: Not A Bug

You should seek assistance from the user mailing list, or on IRC, before filing a bug report.

There are legitimate reasons for this to occur, such as adding or replacing nodes in your
cluster.  During this period, consistency requires more participants than normal.  JIRA is
not meant to assist in diagnosing these potential issues.

If, after having pursued these routes, you can demonstrate this is a bug, please come back
to file a report.

> Cassandra Write failed even when the required nodes to Ack(consistency) are up.
> -------------------------------------------------------------------------------
>                 Key: CASSANDRA-14702
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Rohit Singh
>            Priority: Major
> Hi,
> We have following configuration in our project for cassandra. 
> Total nodes in Cluster-5
> Replication Factor- 3
> Consistency- LOCAL_QUORUM
> We get the writetimeout exception from cassandra even when 2 nodes are up and why does
stack trace says that 3 replica were required when consistency is 2?
> Below is the exception we got:-
> com.datastax.driver.core.exceptions.WriteTimeoutException: Cassandra timeout during write
query at consistency LOCAL_QUORUM (3 replica were required but only 2 acknowledged the write)
>  at com.datastax.driver.core.Responses$Error$1.decode(
>  at com.datastax.driver.core.Responses$Error$1.decode(
>  at com.datastax.driver.core.Message$ProtocolDecoder.decode(
>  at com.datastax.driver.core.Message$ProtocolDecoder.decode(
>  at io.netty.handler.codec.MessageToMessageDecoder.channelRead(

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