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From "Nikita Timofeev (Jira)" <j...@apache.org>
Subject [jira] [Closed] (CAY-2720) ConcurrentModificationException in the TypeAwareSQLTreeProcessor
Date Wed, 08 Sep 2021 14:47:00 GMT

     [ https://issues.apache.org/jira/browse/CAY-2720?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nikita Timofeev closed CAY-2720.
--------------------------------
    Resolution: Fixed

https://github.com/apache/cayenne/commit/3c2175fc7dd9053ee186f19a38caab5f2292fb63

> ConcurrentModificationException in the TypeAwareSQLTreeProcessor
> ----------------------------------------------------------------
>
>                 Key: CAY-2720
>                 URL: https://issues.apache.org/jira/browse/CAY-2720
>             Project: Cayenne
>          Issue Type: Bug
>          Components: Core Library
>    Affects Versions: 4.2.M3
>            Reporter: Nikita Timofeev
>            Assignee: Nikita Timofeev
>            Priority: Major
>             Fix For: 4.2.B1
>
>
> Seems like TypeAwareSQLTreeProcessor could lead to a {{ConcurrentModificationException}}
when it lazily computes processors for attributes.
> Here's a stack trace:
> {code} 
> Caused by: java.util.ConcurrentModificationException: null
> 	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
> 	at org.apache.cayenne.access.sqlbuilder.sqltree.PerAttributeChildProcessor.process(PerAttributeChildProcessor.java:48)
> 	at org.apache.cayenne.access.translator.select.TypeAwareSQLTreeProcessor.onChildNodeStart(TypeAwareSQLTreeProcessor.java:88)
> 	at org.apache.cayenne.access.sqlbuilder.sqltree.Node.visit(Node.java:106)
> 	at org.apache.cayenne.access.sqlbuilder.sqltree.Node.visit(Node.java:109)
> 	at org.apache.cayenne.access.translator.select.TypeAwareSQLTreeProcessor.process(TypeAwareSQLTreeProcessor.java:61)
> 	at org.apache.cayenne.access.translator.select.SQLGenerationStage.perform(SQLGenerationStage.java:38)
> 	at org.apache.cayenne.access.translator.select.DefaultSelectTranslator.translate(DefaultSelectTranslator.java:98)
> 	at org.apache.cayenne.access.translator.select.DefaultSelectTranslator.getSql(DefaultSelectTranslator.java:104)
> 	at org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.java:87)
> 	at org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:97)
> 	at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:273)
> {code}



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