I'm using Compass and Oracle in an EJB scenario (no spring), getting my datasource from the application server's JNDI registry. Compass is configured using an XML file, mapping objects to the index. During startup, there's nothing wrong showing up in the logs.
My application gathers data from an ERP server which takes some time, so I "batch-update" the index: Objects to be added/deleted to/from the index are cached in a buffer and every 100 objects that buffer is cleared: I create a transaction from the compass session, execute a number of save/delete operations and commit that transaction. Any exceptions would show up in the logs.
Unfortunately, the changes are not written to the database. During startup, a table is created, but it stays empty most of the time, even if I add some thousands of entries. Both index manager and optimizer threads are running, I've left them with their default configurations. After some 8-10 thousand operations, the index thread stalls and doesn't seem to do anything: Nothing in the logs, no CPU activity, not network activity.
This happens both with my local Geronimo server as well as the central SAP Netweaver server.
Can anybody point me in the right direction? Am I missing anything? I post my configuration of compass, although -from the docs- there's nothing too exciting in it. Any help is appreciated. Kind regards,
Edited by: Christian Aust on Apr 25, 2008 4:48 AM
The transaction that session.beginTransaction() returns is always a LocalTransaction, although I'm within a managed environment. There's a JNDI key java:comp/UserTransaction available, but I didn't yet succeed in getting compass to work with it.
Could it be that all changes just end up waiting in that un-commited managed transaction, while (from a local perspective) the changes are already commited? Effectively never reaching the DB?
Edited by: Christian Aust on Apr 25, 2008 6:30 AM
Using the TransactionManagerLookup for Geronimo 1.1 found on the Hibernate mailing list, Compass starts up. However, now I get this message every few seconds after startup, and haven't even saved anything into the index...
13:32:13,547 WARN LuceneSearchEngine Transaction not committed/rolled backed, rolling back
1. Don't inject the datasource from Jndi, configure Compass to work in a managed=false mode, and have Compass create the connection to the database. Just check if this works.
2. You will need to configure Compass with JTA when working with Jndi database (preferable) with managed=true. Now, the question is how you are going to get it in Geronimo environment, which I have not tried. It works in a very similar manner to Hibernate, but I can't help much more than that.
thanks for your input, I'll try to see if it works if I let Compass do the database pooling. Next thing monday morning.
During my further research Friday, I found out that I was able to use JTA exactly in the same way like it works for hibernate, so I wrote a JTA lookup manager for Geronimo 1.1 that actually works. However, as soon as the scheduled index optimizer kicks in (every 10 seconds), I get a warning about a transaction not being commited or rolled back. I dont remember the actual wording but it's somewhat related to a transaction being in state STARTED when it isn't expected to be.
Debugging through the code showed that the LuceneIndexEngine eventually called commit() but still that warning appeared. Any idea?
Oh, BTW: The issue about UserTransaction not being available was a bummer: UserTransaction is available in JNDI only if the bean manages the transactions, not the container. Stupid me... took me a day to find out, almost.
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