Postgresql batching causes strange exceptions.

[jamoore]

After beginning to use the StatelessSession, a JDBC bug appeared:

21:21:46,111 WARN  [AbstractBatcher] JDBC driver did not return the expected number of row counts
21:21:46,112 ERROR [AbstractBatcher] Exception executing batch:
java.lang.ArrayIndexOutOfBoundsException: 15
        at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
        at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
        at org.hibernate.jdbc.BatchingBatcher.addToBatch(BatchingBatcher.java:34)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2182)
        at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2595)
        at org.hibernate.impl.StatelessSessionImpl.insert(StatelessSessionImpl.java:93)
        at org.hibernate.impl.StatelessSessionImpl.insert(StatelessSessionImpl.java:75)

Suggested solution appears to be to disable batching via:

hibernate.jdbc.batch_size=0

Also tried other drivers:

• 8.2dev-503 JDBC 3
• 8.1-407 JDBC 3

Reference : ​http://www.mail-archive.com/hibernate-devel@lists.sourceforge.net/msg02333.html

[jmoore]

r935 turns off batching.

[jmoore]

Before I forget, this bug has one other strange feature: it only appeared every other call. That is, on the first run a test case would pass, and on the next it would fail, and on the next it would pass again. Et cetera.