Syncgateway doesn't import all documents while importing 50M docs ( build 2.1.3-4)

Syncgateway import hangs after importing ~560K docs out of 1M docs .

I do not see anything in specific in error log folder .

But  I do see crc32c_doc_unmarshal_count & crc32c_mismatch_count ~987558 . 

"syncGateway_import": {"crc32c_doc_unmarshal_count": 987558, "crc32c_mismatch_count": 987558, "import_count": 504360},

Can you please take a look at the log files attachedlogs_172.23.97.21.tar.gz .