Peter Hvass created CAY-2713:
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Summary: ConcurrentModificationException when Inserting
Key: CAY-2713
URL: https://issues.apache.org/jira/browse/CAY-2713
Project: Cayenne
Issue Type: Bug
Affects Versions: 4.2.M3
Reporter: Peter Hvass
We're seeing an odd CoModException when recording visit information on our web
app - we assemble information related to the visit (i.e.: page visited, date of
visit) and then commit. Vast majority of cases this works except a rare few
where we see the following stack trace.
Always thankful for this project and its maintenance - if there is anything I
can do to help debug or provide further info please just let me know.
Stack Trace:
java.util.ConcurrentModificationException
at java.util.HashMap.forEach(HashMap.java:1292)
at org.apache.cayenne.access.flush.operation.Values.merge(Values.java:90)
at
org.apache.cayenne.access.flush.operation.DbRowOpMerger.mergeValues(DbRowOpMerger.java:75)
at
org.apache.cayenne.access.flush.operation.DbRowOpMerger.visitInsert(DbRowOpMerger.java:49)
at
org.apache.cayenne.access.flush.operation.DbRowOpMerger.visitInsert(DbRowOpMerger.java:29)
at
org.apache.cayenne.access.flush.operation.InsertDbRowOp.accept(InsertDbRowOp.java:40)
at
org.apache.cayenne.access.flush.operation.DbRowOpMerger.apply(DbRowOpMerger.java:41)
at
org.apache.cayenne.access.flush.operation.DbRowOpMerger.apply(DbRowOpMerger.java:29)
at java.util.HashMap.merge(HashMap.java:1254)
at
org.apache.cayenne.access.flush.DefaultDataDomainFlushAction.lambda$mergeSameObjectIds$2(DefaultDataDomainFlushAction.java:133)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at
org.apache.cayenne.access.flush.DefaultDataDomainFlushAction.mergeSameObjectIds(DefaultDataDomainFlushAction.java:133)
at
org.apache.cayenne.access.flush.DefaultDataDomainFlushAction.flush(DefaultDataDomainFlushAction.java:85)
at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:637)
at org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:609)
at
org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:835)
at
org.apache.cayenne.tx.TransactionFilter.lambda$onSync$0(TransactionFilter.java:61)
at
org.apache.cayenne.tx.DefaultTransactionManager$BaseTransactionHandler.performInTransaction(DefaultTransactionManager.java:180)
at
org.apache.cayenne.tx.DefaultTransactionManager$BaseTransactionHandler.performInNewTransaction(DefaultTransactionManager.java:152)
at
org.apache.cayenne.tx.DefaultTransactionManager$NestedTransactionHandler.handle(DefaultTransactionManager.java:95)
at
org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:62)
at
org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:40)
at org.apache.cayenne.tx.TransactionFilter.onSync(TransactionFilter.java:61)
at
org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:834)
at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:596)
at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:737)
[wrapped] org.apache.cayenne.CayenneRuntimeException: [v.4.2.M3 Mar 13 2021
14:15:14] Commit Exception
at org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:769)
at org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:686)
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