I published your mpk in my ArcGIS Server on an Oracle database. With 10.2 and 10.2.1 versions of GEP, I got 14 features each poll. The log file indicates null features caused the problem.
2014-01-16 13:44:46,547 | ERROR | in DataProcessor | InboundStreamImpl | 302 - com.esri.ges.manager.internal-streammanager - 10.2.1 | The Adapter for Input 'fs-poll-in' reported an error
java.lang.NullPointerException
at com.esri.ges.adapter.json.FeatureJsonInboundAdapter.parseFeature(FeatureJsonInboundAdapter.java:190)[242:com.esri.ges.framework.adapter.feature-json-adapter:10.2.1]
at com.esri.ges.adapter.json.FeatureJsonInboundAdapter.receive(FeatureJsonInboundAdapter.java:127)[242:com.esri.ges.framework.adapter.feature-json-adapter:10.2.1]
at com.esri.ges.manager.stream.internal.InboundAdapterProxy.receive(InboundAdapterProxy.java:40)[302:com.esri.ges.manager.internal-streammanager:10.2.1]
If you look at the table, there are some records with null coordinates. You won't find a feature for these records because the features are null. As a result the feature json inbound adapter choked on these.
First, make sure you see the same problem as what I described. If not, we have to look at a different direction. Secondly, see if you can remove these records from the feature class and try polling again.
This problem is fixed in 10.2.2.
Let me know.
Thanks,
Ming