[CASSANDRA-14702] Cassandra Write failed even when the required nodes to Ack(consistency) are up.

• Type: Bug
• Status: Resolved
• Priority: Low
• Resolution: Not A Problem
• Component/s: Legacy/Coordination
• Severity: Low
• Assignee: Unassigned
• Reporter: Rohit Singh
• Created: 07/Sep/18 09:24
• Updated: 16/Apr/19 09:29
• Resolved: 17/Dec/18 18:18

Description

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$1.decode(Responses.java:59)
at com.datastax.driver.core.Responses$Error$1.decode(Responses.java:37)
at com.datastax.driver.core.Message$ProtocolDecoder.decode(Message.java:289)
at com.datastax.driver.core.Message$ProtocolDecoder.decode(Message.java:269)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:88)