Hi everybody! I am using the java implementation and seeing the following error logged sporadically, both in the development server and live. Note that it does not seem to be a "real" error, as the commit always goes through and my data looks perfectly fine. Could it be a low-level exception that is not converted back to a JDOException? Is it a real error?
org.datanucleus.transaction.Transaction commit: Operation commit failed on resource: org.datanucleus.store.appengine.datastorexaresou...@608d41, error code UNKNOWN and transaction: [DataNucleus Transaction, ID=Xid= I think the root cause of this problem is that I'm reading entities from one entity group, cache them and then I open a transaction on another entity group. In short, I spawn tasks that first read 30 or so entities and copy a subset of their content into memory. Then, I open a transaction and cache this content to a "global" entity (just a wrapper around a Blob) for later use. My goal is to go over all the entities of a kind (1000s) and cache a subset of their data that I often need. The cache and the other entities are not in the same entity group. If I only perform the transaction, without reading the other entities first the error does not occur. Note that I'm doing this very carefully -- I perform all my data store operations inside of a try/catch && for loop to retry if necessary. Thanks for any help! Marc -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
