Identify Operation of a map service returns truncated results for fields which have a float (single) DataType at REST endpoint if the map service is published using MSD.
This issue is not reproducible in the current release of the software. Contact ESRI Technical Support (for users in the United States) or ESRI distributor (for users outside the United States) to resolve this issue, if the issue persists.
解决办法
Publish map services using MXD if there are any fields with Float DataType and run the Identify operation.