Hi, I have been getting contention errors when uploading data into the datastore (note I have tuned the defaults which have worked for other Kinds):
Note: I am using app engine release 1.3.6 for Mac OS X. --- Uploading data records. [INFO ] Logging to bulkloader-log-20100819.113509 [INFO ] Throttling transfers: [INFO ] Bandwidth: 2500000 bytes/second [INFO ] HTTP connections: 8/second [INFO ] Entities inserted/fetched/modified: 80/second [INFO ] Batch Size: 80 [INFO ] Opening database: bulkloader-progress-20100819.113509.sql3 [INFO ] Connecting to XXX.com/remote_api [INFO ] Starting import; maximum 80 entities per post .............................................................................................................................................................................................................................................................. [ERROR ] Retrying on non-fatal datastore error: too much contention on these datastore entities. please try again. Traceback (most recent call last): File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/ GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/ google/appengine/tools/bulkloader.py", line 691, in PerformWork transfer_time = self._TransferItem(thread_pool) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/ GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/ google/appengine/tools/bulkloader.py", line 848, in _TransferItem self.request_manager.PostEntities(self.content) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/ GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/ google/appengine/tools/bulkloader.py", line 1292, in PostEntities datastore.Put(entities) File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/ GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/ google/appengine/api/datastore.py", line 293, in Put raise _ToDatastoreError(err) TransactionFailedError: too much contention on these datastore entities. please try again. ......................................................................................................................................................................................................................................................................................................... [ERROR ] Retrying on non-fatal datastore error: too much contention on these datastore entities. please try again. --- I've read Google's documentation with regard to contention, and the only relationship I am using with these entities are referenceproperties that I define in bulkloader.yaml: --- transformers: - kind: ServiceRef connector: csv connector_options: columns: from_header property_map: - property: __key__ external_name: key export_transform: transform.key_id_or_name_as_string - property: pseudokey external_name: pseudokey - property: serviceRecord external_name: serviceRecord import_transform: transform.create_foreign_key('ServiceRecord') export_transform: transform.key_id_or_name_as_string --- Here's the problem: 1 - There are only unique entities in the entities I am uploading (so there should be no contention for the same entity) 2 - There should be no entity groups that would generate contention (since I am using referenceproperty as indicated in the docs) Any idea what's happening here? Thank you. -- 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.