java.sql.SQLException: Unexpected token OFPUBSUBITEM, requires FROM in statement [DELETE ofPubsubItem FROM ofPubsubItem LEFT JOIN (SELECT id FROM ofPubsubItem WHERE serviceID=? AND nodeID=? ORDER BY creationDate DESC LIMIT ?) AS noDelete ON ofPubsubItem.id = noDelete.id WHERE noDelete.id IS NULL AND ofPubsubItem.serviceID = ? AND nodeID = ?]
at org.hsqldb.jdbc.Util.throwError(Unknown Source)
at org.hsqldb.jdbc.jdbcPreparedStatement.<init>(Unknown Source)
at org.hsqldb.jdbc.jdbcConnection.prepareStatement(Unknown Source)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.ja va:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at org.logicalcobwebs.proxool.WrappedConnection.invoke(WrappedConnection.java:162)
at org.logicalcobwebs.proxool.WrappedConnection.intercept(WrappedConnection.java:8 7)
at $java.sql.Wrapper$$EnhancerByProxool$$694b7953.prepareStatement(<generated>)
at org.jivesoftware.openfire.pubsub.PubSubPersistenceManager.purgeItems(PubSubPers istenceManager.java:1874)
at org.jivesoftware.openfire.pubsub.PubSubPersistenceManager.access$000(PubSubPers istenceManager.java:62)
at org.jivesoftware.openfire.pubsub.PubSubPersistenceManager$2.run(PubSubPersisten ceManager.java:279)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)