This might be good to split off into a separate issue (and it doesn't necessarily need to block the release), but I'm finding that, when using TDB2 with this release candidate in a concurrent write context, I start encountering a lot of errors. And those errors are definitely not present with 3.13.1. Specifically, the issue seems to be related to contention over the TDB2 ThreadBufferingCache. That buffering cache is present in the 3.13.1 release, and I'm not entirely sure what changed with 3.14.0 that would trigger these errors, but this is the relevant part of the stack trace:
Caused by: org.apache.jena.tdb2.TDBException: ThreadBufferingCache: already buffering at org.apache.jena.tdb2.store.nodetable.ThreadBufferingCache.enableBuffering(ThreadBufferingCache.java:88) at org.apache.jena.tdb2.store.nodetable.NodeTableCache.updateStart(NodeTableCache.java:352) at org.apache.jena.tdb2.store.nodetable.NodeTableCache.notifyTxnStart(NodeTableCache.java:319) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.lambda$notifyBegin$14(TransactionCoordinator.java:915) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.lambda$listeners$0(TransactionCoordinator.java:207) at java.base/java.util.ArrayList.forEach(ArrayList.java:1540) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.listeners(TransactionCoordinator.java:207) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.notifyBegin(TransactionCoordinator.java:915) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.begin(TransactionCoordinator.java:553) at org.apache.jena.dboe.transaction.txn.TransactionCoordinator.begin(TransactionCoordinator.java:509) at org.apache.jena.dboe.transaction.txn.TransactionalBase.begin(TransactionalBase.java:110) at org.apache.jena.dboe.storage.system.DatasetGraphStorage.begin(DatasetGraphStorage.java:59) at org.apache.jena.sparql.core.DatasetGraphWrapper.begin(DatasetGraphWrapper.java:233) at org.apache.jena.sparql.core.DatasetImpl.begin(DatasetImpl.java:116) at org.apache.jena.system.Txn.exec(Txn.java:76) at org.apache.jena.system.Txn.executeWrite(Txn.java:125) at org.apache.jena.rdfconnection.RDFConnectionLocal.update(RDFConnectionLocal.java:80) Effectively, I get that error at the first time a client attempts to concurrently write to the TDB2 store. Subsequent attempts just hang. Cheers, Aaron On Mon, 13 Jan 2020 at 11:23, Andy Seaborne <a...@apache.org> wrote: > Hi, > > Here is a vote on the release of Apache Jena 3.14.0 > This is the first proposed release candidate. > > ==== Changes: > > https://s.apache.org/jena-3.14.0-jira > > ==== Release Vote > > Everyone, not just committers, is invited to test and vote. > Please download and test the proposed release. > > Staging repository: > https://repository.apache.org/content/repositories/orgapachejena-1035 > > Proposed dist/ area: > https://dist.apache.org/repos/dist/dev/jena/ > > Keys: > https://svn.apache.org/repos/asf/jena/dist/KEYS > > Git commit (browser URL): > https://github.com/apache/jena/commit/19d42a5 > > Git Commit Hash: > 19d42a57a9debc675047b2d1ce9769979c43e7d8 > > Git Commit Tag: > jena-3.14.0 > > Please vote to approve this release: > > [ ] +1 Approve the release > [ ] 0 Don't care > [ ] -1 Don't release, because ... > > This vote will be open until at least > > Thursday, 16th January 2020 at 187:00 UTC > > If you expect to check the release but the time limit does not work > for you, please email within the schedule above with an expected time > and we can extend the vote period. > > Thanks, > > Andy > > Checking needed: > > + are the GPG signatures fine? > + are the checksums correct? > + is there a source archive? > > + can the source archive really be built? > (NB This requires a "mvn install" first time) > + is there a correct LICENSE and NOTICE file in each artifact > (both source and binary artifacts)? > + does the NOTICE file contain all necessary attributions? > + have any licenses of dependencies changed due to upgrades? > if so have LICENSE and NOTICE been upgraded appropriately? > + does the tag/commit in the SCM contain reproducible sources? >
