Hi, does nobody have any idea? Should I post this on the dev list because it could be a Cayenne bug?
Maik > Am 28.07.2017 um 17:20 schrieb Musall, Maik <[email protected]>: > > Hi, > > I've been trying to resolve an unpleasant problem for a few days now. I'm > trying to save a graph of new and changed objects related to each other, > using a PostgreSQL 9.5 database. The number of objects is in the range > between 10 and 100 usually. Several objects of the same class each, and > numerous relationships involved. The model as a whole contains a few indirect > cyclic relationships, but in these failing inserts, there aren't any cyclic > relations involved. > > I get something like this: > > org.apache.cayenne.CayenneRuntimeException: [v.4.0.B2-SNAPSHOT Jul 12 2017 > 08:27:18] Commit Exception > at > org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:774) > at > org.apache.cayenne.access.DataContext.commitChangesToParent(DataContext.java:682) > at > com.selbstdenker.canusa.powerd.PDObjectContext.saveChanges(PDObjectContext.java:171) > (stuff ommitted) > Caused by: org.postgresql.util.PSQLException: ERROR: duplicate key value > violates unique constraint "pdcjourneyelementtexts_pk" > Detail: Key (journeyelementtextskey)=(1528690) already exists. > at > org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2198) > at > org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1927) > at > org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:405) > at > org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2892) > at > com.zaxxer.hikari.pool.ProxyStatement.executeBatch(ProxyStatement.java:125) > at > com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeBatch(HikariProxyPreparedStatement.java) > at > org.apache.cayenne.access.jdbc.BatchAction.runAsBatch(BatchAction.java:120) > at > org.apache.cayenne.access.jdbc.BatchAction.performAction(BatchAction.java:85) > at > org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:97) > at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:293) > at > org.apache.cayenne.access.DataDomainFlushAction.runQueries(DataDomainFlushAction.java:233) > at > org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushAction.java:153) > at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:633) > at > org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:603) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at > org.apache.cayenne.commitlog.CommitLogFilter.onSync(CommitLogFilter.java:85) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at > org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:73) > at > org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:70) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:87) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInLocalTransaction(DefaultTransactionManager.java:59) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:52) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:40) > at > org.apache.cayenne.tx.TransactionFilter.onSync(TransactionFilter.java:70) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:590) > at > org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:742) > ... 60 more > > A few notes: > > * Before this insert, the max primary key of this table was 1528658, last > sequence value was 1528688. > * It happens with one of the tables involved each time, and the table this > happens with changes randomly. > * I had all but the m:n cross tables set to database-generated pk, but also > tried having everything Cayenne-generated (so that Cayenne would be fetching > new sequence values before inserting, which I verified it did). Makes no > difference. > * I verified before each test run that all sequence values are between 0 and > 32 greater than the current max primary key of the corresponding table (wrote > a script for that). > > Then I did some research and found that maybe Cayenne fails to figure out a > proper insert ordering. So I tried using WeightedAshwoodEntitySorter with > @SortWeight (now in cayenne-server), following this mail thread: > https://lists.apache.org/thread.html/0452cd5ca9de85f19882539710588f1b221da7627f845902ed10a7b6@1461051077@%3Cuser.cayenne.apache.org%3E > > <https://lists.apache.org/thread.html/0452cd5ca9de85f19882539710588f1b221da7627f845902ed10a7b6@1461051077@%3Cuser.cayenne.apache.org%3E> > but with that the application won't even start up because one of the first > DML statements already fails: > > Caused by: java.lang.NullPointerException: No record for DbEntity: > org.apache.cayenne.map.DbEntity@a92be4f[name=PDCUserLeafletLog] > at > org.apache.cayenne.ashwood.AshwoodEntitySorter$DbEntityComparator.compare(AshwoodEntitySorter.java:368) > at > org.apache.cayenne.ashwood.AshwoodEntitySorter$DbEntityComparator.compare(AshwoodEntitySorter.java:352) > at > org.apache.cayenne.ashwood.WeightedAshwoodEntitySorter$WeightedDbEntityComparator.compare(WeightedAshwoodEntitySorter.java:103) > at > org.apache.cayenne.ashwood.WeightedAshwoodEntitySorter$WeightedDbEntityComparator.compare(WeightedAshwoodEntitySorter.java:95) > at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) > at java.util.TimSort.sort(TimSort.java:220) > at java.util.Arrays.sort(Arrays.java:1512) > at java.util.ArrayList.sort(ArrayList.java:1454) > at java.util.Collections.sort(Collections.java:175) > at > org.apache.cayenne.ashwood.AshwoodEntitySorter.sortDbEntities(AshwoodEntitySorter.java:182) > at > org.apache.cayenne.access.DataDomainInsertBucket.appendQueriesInternal(DataDomainInsertBucket.java:56) > at > org.apache.cayenne.access.DataDomainSyncBucket.appendQueries(DataDomainSyncBucket.java:78) > at > org.apache.cayenne.access.DataDomainFlushAction.preprocess(DataDomainFlushAction.java:185) > at > org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushAction.java:143) > at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:633) > at > org.apache.cayenne.access.DataDomain.onSyncNoFilters(DataDomain.java:603) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at > org.apache.cayenne.commitlog.CommitLogFilter.onSync(CommitLogFilter.java:85) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at > org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:73) > at > org.apache.cayenne.tx.TransactionFilter$1.perform(TransactionFilter.java:70) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:87) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInLocalTransaction(DefaultTransactionManager.java:59) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:52) > at > org.apache.cayenne.tx.DefaultTransactionManager.performInTransaction(DefaultTransactionManager.java:40) > at > org.apache.cayenne.tx.TransactionFilter.onSync(TransactionFilter.java:70) > at > org.apache.cayenne.access.DataDomain$DataDomainSyncFilterChain.onSync(DataDomain.java:764) > at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:590) > at > org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:742) > ... 18 more > > This again points to this mail thread: > http://cayenne.195.n3.nabble.com/Erratic-AshwoodEntitySorter-NPE-on-Latest-Snapshot-td4027453.html#a4028225 > > <http://cayenne.195.n3.nabble.com/Erratic-AshwoodEntitySorter-NPE-on-Latest-Snapshot-td4027453.html#a4028225> > and the NPE message is actually an output of the mentioned commit that Andrus > added at the time, but the mail thread stopped there in December. > > The mentioned class PDCUserLeafletLog has @SortWeight(1000), inherited from > the CayenneDataObject subclass that I use for everything. I assigned lower > sort weights, starting at 1, for the main root classes that should be > inserted first, incrementing for each relationship from there. > > So at this point, I'm at a loss how to solve this. Any help is greatly > appreciated. > > Thanks > Maik >
