This is reproduced by org.hibernate.test.hql.BulkManipulationTest using PostgresPlusDialect.

On the second multi-table delete in a transaction, the following exception is thrown:

org.hibernate.exception.GenericJDBCException: could not execute statement
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)
at org.hibernate.hql.spi.id.TableBasedDeleteHandlerImpl.execute(TableBasedDeleteHandlerImpl.java:122)
at org.hibernate.hql.internal.ast.exec.MultiTableDeleteExecutor.execute(MultiTableDeleteExecutor.java:44)
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.executeUpdate(QueryTranslatorImpl.java:429)
at org.hibernate.engine.query.spi.HQLQueryPlan.performExecuteUpdate(HQLQueryPlan.java:370)
at org.hibernate.internal.SessionImpl.executeUpdate(SessionImpl.java:1290)
at org.hibernate.internal.QueryImpl.executeUpdate(QueryImpl.java:102)
at org.hibernate.test.hql.BulkManipulationTest$TestData.cleanup(BulkManipulationTest.java:1655)
at org.hibernate.test.hql.BulkManipulationTest$TestData.access$200(BulkManipulationTest.java:1545)
at org.hibernate.test.hql.BulkManipulationTest.testBooleanHandling(BulkManipulationTest.java:183)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.hibernate.testing.junit4.ExtendedFrameworkMethod.invokeExplosively(ExtendedFrameworkMethod.java:45)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.internal.runners.statements.FailOnTimeout$StatementThread.run(FailOnTimeout.java:74)
Caused by: com.edb.util.PSQLException: ERROR: current transaction is aborted, commands ignored until end of transaction block
at com.edb.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2663)
at com.edb.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2279)
at com.edb.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:545)
at com.edb.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:610)
at com.edb.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:438)
at com.edb.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:384)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
... 21 more