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Posted to commits@cassandra.apache.org by "Zoltan Ersek (Jira)" <ji...@apache.org> on 2021/07/01 11:44:00 UTC
[jira] [Commented] (CASSANDRA-16703) Exception thrown by custom
QueryHandler constructor is ignored
[ https://issues.apache.org/jira/browse/CASSANDRA-16703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17372689#comment-17372689 ]
Zoltan Ersek commented on CASSANDRA-16703:
------------------------------------------
https://github.com/apache/cassandra/pull/1096
> Exception thrown by custom QueryHandler constructor is ignored
> --------------------------------------------------------------
>
> Key: CASSANDRA-16703
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16703
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Startup and Shutdown
> Reporter: Francisco Bento
> Assignee: Zoltan Ersek
> Priority: Normal
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When a exception is thrown during the instantiation of the _cassandra.custom_query_handler_class,_ depending on the exception thrown cassandra will simply log an info message and proceed with the bootstraping with the standard _QueryHandler_ as a fallback measure: [https://github.com/apache/cassandra/blob/cassandra-3.11.10/src/java/org/apache/cassandra/service/ClientState.java#L107|https://github.com/apache/cassandra/blob/3b553d8e13dbdbe59119de9c917d9aacc440741e/src/java/org/apache/cassandra/service/ClientState.java#L104]
> The end-user will never know if the custom _QueryHandler_ is actually registered or not, unless he notices the info message on the logs.
> Ideally, the message should be logged as error and JVM should stop as it cannot proceed according with the user expected configuration.
> *Scenario*:
> In our scenario, we have a custom _QueryHandler_ that receives specific configuration, and we throw a _ConfigurationException_ at instantiation time in case of any invalid config value. It is expected that cassandra stop the bootstraping instead of skipping the QH.
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