Eu tenho uma estrutura de dados simples (aTransaction mencionados abaixo) a serem inseridos no mongodb:

{"amount":111,"debitAcc":"588188286231743e7d5c923d","type":"CHARGE"}

E eu recebi a seguinte pilha de erros:

com.mongodb.MongoSocketReadException: Prematurely reached end of stream
        at com.mongodb.connection.SocketStream.read(SocketStream.java:88)
        at com.mongodb.connection.InternalStreamConnection.receiveResponseBuffers(InternalStreamConnection.java:494)
        at com.mongodb.connection.InternalStreamConnection.receiveMessage(InternalStreamConnection.java:224)
        at com.mongodb.connection.UsageTrackingInternalConnection.receiveMessage(UsageTrackingInternalConnection.java:96)
        at com.mongodb.connection.DefaultConnectionPool$PooledConnection.receiveMessage(DefaultConnectionPool.java:440)
        at com.mongodb.connection.WriteCommandProtocol.receiveMessage(WriteCommandProtocol.java:262)
        at com.mongodb.connection.WriteCommandProtocol.execute(WriteCommandProtocol.java:104)
        at com.mongodb.connection.InsertCommandProtocol.execute(InsertCommandProtocol.java:67)
        at com.mongodb.connection.InsertCommandProtocol.execute(InsertCommandProtocol.java:37)
        at com.mongodb.connection.DefaultServer$DefaultServerProtocolExecutor.execute(DefaultServer.java:168)
        at com.mongodb.connection.DefaultServerConnection.executeProtocol(DefaultServerConnection.java:289)
        at com.mongodb.connection.DefaultServerConnection.insertCommand(DefaultServerConnection.java:118)
        at com.mongodb.operation.InsertOperation.executeCommandProtocol(InsertOperation.java:76)
        at com.mongodb.operation.BaseWriteOperation$1.call(BaseWriteOperation.java:139)
        at com.mongodb.operation.BaseWriteOperation$1.call(BaseWriteOperation.java:133)
        at com.mongodb.operation.OperationHelper.withConnectionSource(OperationHelper.java:422)
        at com.mongodb.operation.OperationHelper.withConnection(OperationHelper.java:413)
        at com.mongodb.operation.BaseWriteOperation.execute(BaseWriteOperation.java:133)
        at com.mongodb.operation.BaseWriteOperation.execute(BaseWriteOperation.java:60)
        at com.mongodb.Mongo.execute(Mongo.java:845)
        at com.mongodb.Mongo$2.execute(Mongo.java:828)
        at com.mongodb.DBCollection.executeWriteOperation(DBCollection.java:342)
        at com.mongodb.DBCollection.insert(DBCollection.java:337)
        at com.mongodb.DBCollection.insert(DBCollection.java:328)
        at org.mongodb.morphia.DatastoreImpl.saveDocument(DatastoreImpl.java:1297)
        at org.mongodb.morphia.DatastoreImpl.tryVersionedUpdate(DatastoreImpl.java:1340)
        at org.mongodb.morphia.DatastoreImpl.save(DatastoreImpl.java:1286)
        at org.mongodb.morphia.DatastoreImpl.save(DatastoreImpl.java:775)
        at org.mongodb.morphia.DatastoreImpl.save(DatastoreImpl.java:758)

Minha versão do mongodb é3.4.2.

O interessante é que não tenho o problema no meu ambiente de desenvolvimento local (mint linux 18.1). Mas simplesmente não funciona no meu ambiente SIT, que é um ubuntu 16.04

Qualquer ideia?

Atualizações com código para inserir o documento

OndetransactionDao.save(...) implementação pode ser encontrada em:

https://github.com/actframework/act-morphia/blob/master/src/main/java/act/db/morphia/MorphiaDaoBase.java#L206

atualização 2

O sistema trabalha com outras gravações (mesmo com registros muito maiores)