Hi,
I am puzzled by a quite strange behaviour. We have two threads, both with their own sessions (and only integer-id's are passed between threads).
However when one thread triggers a ConstraintViolationException because it tries to persist invalid entities, the other thread starts to become non-functional too
and it throws the following Exception:
Code:
org.hibernate.exception.GenericJDBCException: could not load an entity: [somepackage.SomeClass#397]
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:140)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:128)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1957)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:86)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:76)
at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:69)
at org.hibernate.loader.entity.BatchingEntityLoader.load(BatchingEntityLoader.java:113)
at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3270)
at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496)
at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477)
at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227)
at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:285)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1080)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:997)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:990)
at khdb.kladde.AsyncStatusCalculator.run(AsyncStatusCalculator.java:98)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
//The current transaction has been aborted, commands are ignored till exception is ended.
Caused by: org.postgresql.util.PSQLException: FEHLER: aktuelle Transaktion wurde abgebrochen, Befehle werden bis zum Ende der Transaktion ignoriert
at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2062)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1795)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:257)
at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:479)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:367)
at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:271)
at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
at org.hibernate.loader.Loader.getResultSet(Loader.java:1869)
at org.hibernate.loader.Loader.doQuery(Loader.java:718)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:270)
at org.hibernate.loader.Loader.loadEntity(Loader.java:1953)
... 17 more
The code looks like this:
Code:
//Thread one
try {
tx.begin();
session.persist(); //Will lead to: org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update
tx.commit();
}catch(Exception e) {
tx.rollback();
}
//Thread two:
public void run() {
Session session = sessionFactory.openSession;
try {
session.get(SomeClass.class, id); //Throws an exception
}finally {
session.close();
}
}
Any idea whats going wrong here? How can one session interfer with a completly seperated one?
Thank you in advance, Clemens
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