Paulo Motta created CASSANDRA-14168:
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Summary: Throw error when attempting to mutate non-existant table
Key: CASSANDRA-14168
URL: https://issues.apache.org/jira/browse/CASSANDRA-14168
Project: Cassandra
Issue Type: Bug
Reporter: Paulo Motta
Assignee: Paulo Motta
When a node receives a write request for a table that was just created but it's
TableMetadata is not yet registered, it will [throw a
UnknownTableException|https://github.com/apache/cassandra/blob/7a40abb6a5108688fb1b10c375bb751cbb782ea4/src/java/org/apache/cassandra/schema/Schema.java#L474].
There is a small racy period though between when the {{TableMetadata}} [is
registered|https://github.com/apache/cassandra/blob/88c0e29caaffab41422adc673182bb9549e735ab/src/java/org/apache/cassandra/schema/Schema.java#L642]
and it's {{ColumnFamilyStore}} is
[created|https://github.com/apache/cassandra/blob/88c0e29caaffab41422adc673182bb9549e735ab/src/java/org/apache/cassandra/schema/Schema.java#L643],
that a write request can be [silently dropped due to ColumnFamilyStore not
being
instantiated|https://github.com/apache/cassandra/blob/8b3a60b9a7dbefeecc06bace617279612ec7092d/src/java/org/apache/cassandra/db/Keyspace.java#L603]
- even though an error is logged, the request will be completed and an ack
wrongly sent to the coordinator.
This was detected during investigation of a flakiness on
{{materialized_views_test.py:TestMaterializedViews.populate_mv_after_insert_wide_rows_test}}.
ps: this is not an issue before 4.0, because a new table's {{TableMetadata}}
was only registered after its
{{ColumnFamilyStore}} object [was
loaded|https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/config/Schema.java#L671]
(which appears to be changed by CASSANDRA-9425).
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