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Posted to commits@cassandra.apache.org by "Joshua McKenzie (JIRA)" <ji...@apache.org> on 2018/07/09 20:11:00 UTC
[jira] [Updated] (CASSANDRA-14168) Throw error when attempting to
mutate non-existant table
[ https://issues.apache.org/jira/browse/CASSANDRA-14168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joshua McKenzie updated CASSANDRA-14168:
----------------------------------------
Component/s: Distributed Metadata
Core
> 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
> Components: Core, Distributed Metadata
> Reporter: Paulo Motta
> Assignee: Paulo Motta
> Priority: Major
>
> 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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