Timur Tibeyev created CASSANDRA-14981:
-----------------------------------------
Summary: Cassandra fires NoHostAvailable exception, but trigger
receives update
Key: CASSANDRA-14981
URL: https://issues.apache.org/jira/browse/CASSANDRA-14981
Project: Cassandra
Issue Type: Bug
Environment: cassandra 3.11.3
Reporter: Timur Tibeyev
Attachments: Cassandra.png, Kafka consumer.png
Cluster
I have cluster with three nodes, cluster is created via `docker-compose`.
All nodes in the cluster have `UN` (up normal) status, checked with `nodetool
status`.
Trigger
Trigger receives event and produces `Kafka` record.
All three nodes have same trigger.
Table
Here is my CQL query, `users` table replication factor is 2
Consistency level is one
```
CREATE KEYSPACE mytestdb WITH replication = \{ 'class':'SimpleStrategy',
'replication_factor':2 };
USE mytestdb;
CREATE TABLE IF NOT EXISTS users (
id uuid,
username text,
phone text,
lastname text,
firstname text,
PRIMARY KEY (id)
);
CREATE TRIGGER kafka_trigger ON users USING 'org.company.CassandraTrigger';
```
Problem
Everything worked fine so I wanted to check edge cases, I intentionally shut
down 2 nodes, to check how `Cassandra` and trigger will perform.
I started to make queries to single working node.
Some inserts were processed correctly, but for some of them `NoHostAvailable`
exception occurred, but trigger received this "failed" insert event and
produced normal `Kafka` record
The problem is - data was not saved to `Cassandra`, but trigger received update.
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