Same problem
Log:
2011.10.04 10:04:44 [org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:69)] Internal server error
java.lang.NullPointerException
at com.reucon.openfire.plugin.archive.impl.JdbcPersistenceManager.getConversation( JdbcPersistenceManager.java:710)
at com.reucon.openfire.plugin.archive.impl.JdbcPersistenceManager.getConversation( JdbcPersistenceManager.java:667)
at com.reucon.openfire.plugin.archive.xep0136.IQRetrieveHandler.retrieve(IQRetriev eHandler.java:96)
at com.reucon.openfire.plugin.archive.xep0136.IQRetrieveHandler.handleIQ(IQRetriev eHandler.java:33)
at com.reucon.openfire.plugin.archive.xep0136.Xep0136Support$1.handleIQ(Xep0136Sup port.java:44)
at org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:49)
at org.jivesoftware.openfire.IQRouter.handle(IQRouter.java:351)
at org.jivesoftware.openfire.IQRouter.route(IQRouter.java:101)
at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:68)
at org.jivesoftware.openfire.net.StanzaHandler.processIQ(StanzaHandler.java:319)
at org.jivesoftware.openfire.net.ClientStanzaHandler.processIQ(ClientStanzaHandler .java:79)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:284)
at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:176)
at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:133)
at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived (AbstractIoFilterChain.java:570)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.common.IoFilterAdapter.messageReceived(IoFilterAdapter.java:80)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimplePr otocolDecoderOutput.java:58)
at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:185)
at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)
at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)
at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)
at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java :239)
at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(Execut orFilter.java:283)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
at java.lang.Thread.run(Thread.java:636)