EX-31 Rule
13a-14(d)/15d-14(d) Certifications.





I, Kunal K. Singh,
certify that:



1. I have reviewed
this report on Form 10-K and all reports on Form 10-D required to be filed in
respect of the period covered by this report on Form 10-K of the JPMDB
Commercial Mortgage Securities Trust 2017-C5 (the "Exchange Act periodic
reports");



2. Based on my
knowledge, the Exchange Act periodic reports, taken as a whole, do not contain
any untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances under
which such statements were made, not misleading with respect to the period
covered by this report;



3. Based on my knowledge,
all of the distribution, servicing and other information required to be
provided under Form 10-D for the period covered by this report is included in
the Exchange Act periodic reports;



4. Based on my
knowledge and the servicer compliance statements required in this report under
Item 1123 of Regulation AB, and except as disclosed in the Exchange Act
periodic reports, the servicers have fulfilled their obligations under the
servicing agreements in all material respects; and



5. All of the reports
on assessment of compliance with servicing criteria for asset-backed securities
and their related attestation reports on assessment of compliance with
servicing criteria for asset-backed securities required to be included in this
report in accordance with Item 1122 of Regulation AB and Exchange Act Rules
13a-18 and 15d-18 have been included as an exhibit to this report, except as
otherwise disclosed in this report. Any material instances of noncompliance
described in such reports have been disclosed in this report on Form 10-K.



In giving the
certifications above, I have reasonably relied on information provided to me by
the following unaffiliated parties:



Wells Fargo Bank,
National Association, as Master Servicer, CWCapital Asset Management LLC, as
Special Servicer, Wilmington Trust, National Association, as Trustee, Wells
Fargo Bank, National Association, as Certificate Administrator, Wells Fargo
Bank, National Association, as Custodian, Park Bridge Lender Services LLC, as
Operating Advisor, CoreLogic Commercial Real Estate Services, Inc., as
Servicing Function Participant, National Tax Search, LLC, as Servicing Function
Participant, Wells Fargo Bank, National Association, as Primary Servicer for
the Prudential Plaza Mortgage Loan, CWCapital Asset Management LLC, as Special
Servicer for the Prudential Plaza Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Prudential Plaza Mortgage Loan, Wells Fargo
Bank, National Association, as Certificate Administrator for the Prudential
Plaza Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for
the Prudential Plaza Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the Prudential Plaza Mortgage Loan, CoreLogic Commercial
Real Estate Services, Inc., as Servicing Function Participant for the
Prudential Plaza Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Prudential Plaza Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the Hilton Hawaiian Village Mortgage Loan,
AEGON USA Realty Advisors, LLC, as Special Servicer for the Hilton Hawaiian
Village Mortgage Loan, Wilmington Trust, National Association, as Trustee for
the Hilton Hawaiian Village Mortgage Loan, Wells Fargo Bank, National
Association, as Certificate Administrator for the Hilton Hawaiian Village
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Hilton Hawaiian Village Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the Hilton Hawaiian
Village Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Hilton Hawaiian Village Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the 229 West 43rd Street Retail
Condo Mortgage Loan, KeyBank National Association, as Special Servicer for the
229 West 43rd Street Retail Condo Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the 229 West 43rd Street Retail Condo Mortgage
Loan, Wells Fargo Bank, National Association, as Certificate Administrator for
the 229 West 43rd Street Retail Condo Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the 229 West 43rd Street Retail Condo Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the 229 West
43rd Street Retail Condo Mortgage Loan, CoreLogic Commercial Real Estate
Services, Inc., as Servicing Function Participant for the 229 West 43rd Street
Retail Condo Mortgage Loan, National Tax Search, LLC, as Servicing Function Participant
for the 229 West 43rd Street Retail Condo Mortgage Loan, Wells Fargo Bank,
National Association, as Primary Servicer for the Moffett Gateway Mortgage
Loan, LNR Partners, LLC, as Special Servicer for the Moffett Gateway Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the Moffett
Gateway Mortgage Loan, Wells Fargo Bank, National Association, as Certificate
Administrator for the Moffett Gateway Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Moffett Gateway Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Moffett Gateway Mortgage Loan,
CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the Moffett Gateway Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Moffett Gateway Mortgage Loan, Wells
Fargo Bank, National Association, as Primary Servicer for the Summit Mall
Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Summit Mall
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
Summit Mall Mortgage Loan, Wells Fargo Bank, National Association, as
Certificate Administrator for the Summit Mall Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Summit Mall Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Summit Mall Mortgage Loan,
CoreLogic Commercial Real Estate Services, Inc., as Servicing Function
Participant for the Summit Mall Mortgage Loan, National Tax Search, LLC, as
Servicing Function Participant for the Summit Mall Mortgage Loan, Wells Fargo
Bank, National Association, as Primary Servicer for the Dick's Sporting Goods
Portfolio Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Dick's
Sporting Goods Portfolio Mortgage Loan, Wilmington Trust, National Association,
as Trustee for the Dick's Sporting Goods Portfolio Mortgage Loan, Wells Fargo
Bank, National Association, as Certificate Administrator for the Dick's
Sporting Goods Portfolio Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the Dick's Sporting Goods Portfolio Mortgage Loan, Pentalpha
Surveillance LLC, as Operating Advisor for the Dick's Sporting Goods Portfolio
Mortgage Loan, CoreLogic Commercial Real Estate Services, Inc., as Servicing
Function Participant for the Dick's Sporting Goods Portfolio Mortgage Loan,
National Tax Search, LLC, as Servicing Function Participant for the Dick's
Sporting Goods Portfolio Mortgage Loan, Midland Loan Services, a Division of
PNC Bank, National Association, as Primary Servicer for the 350 Park Avenue
Mortgage Loan, AEGON USA Realty Advisors, LLC, as Special Servicer for the 350
Park Avenue Mortgage Loan, Wells Fargo Bank, National Association, as Trustee
and Certificate Administrator for the 350 Park Avenue Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the 350 Park Avenue Mortgage
Loan, Midland Loan Services, a Division of PNC Bank, National Association, as
Primary Servicer for the Summit Place Wisconsin Mortgage Loan, Midland Loan Services,
a Division of PNC Bank, National Association, as Special Servicer for the
Summit Place Wisconsin Mortgage Loan, Wells Fargo Bank, National Association,
as Trustee and Certificate Administrator for the Summit Place Wisconsin
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the
Summit Place Wisconsin Mortgage Loan, Park Bridge Lender Services LLC, as
Operating Advisor for the Summit Place Wisconsin Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Primary Servicer for
the Landmark Square Mortgage Loan, LNR Partners, LLC, as Special Servicer for
the Landmark Square Mortgage Loan, Wells Fargo Bank, National Association, as
Trustee and Certificate Administrator for the Landmark Square Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Landmark Square
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the
Landmark Square Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Primary Servicer for the Dallas Design District
Mortgage Loan, LNR Partners, LLC, as Special Servicer for the Dallas Design
District Mortgage Loan, Wells Fargo Bank, National Association, as Trustee and
Certificate Administrator for the Dallas Design District Mortgage Loan, Wells
Fargo Bank, National Association, as Custodian for the Dallas Design District
Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for the Dallas
Design District Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Key Center Cleveland Mortgage Loan, Rialto Capital Advisors,
LLC, as Special Servicer for the Key Center Cleveland Mortgage Loan, Deutsche
Bank Trust Company Americas, as Trustee for the Key Center Cleveland Mortgage
Loan, Citibank, N.A., as Certificate Administrator for the Key Center Cleveland
Mortgage Loan, Deutsche Bank Trust Company Americas, as Custodian for the Key
Center Cleveland Mortgage Loan, Park Bridge Lender Services LLC, as Operating
Advisor for the Key Center Cleveland Mortgage Loan, CoreLogic Commercial Real
Estate Services, Inc., as Servicing Function Participant for the Key Center
Cleveland Mortgage Loan, National Tax Search, LLC, as Servicing Function
Participant for the Key Center Cleveland Mortgage Loan, Midland Loan Services,
a Division of PNC Bank, National Association, as Primary Servicer for the Uovo
Art Storage Mortgage Loan, Rialto Capital Advisors, LLC, as Special Servicer
for the Uovo Art Storage Mortgage Loan, Wells Fargo Bank, National Association,
as Trustee and Certificate Administrator for the Uovo Art Storage Mortgage
Loan, Wells Fargo Bank, National Association, as Custodian for the Uovo Art
Storage Mortgage Loan, and Park Bridge Lender Services LLC, as Operating
Advisor for the Uovo Art Storage Mortgage Loan.







Dated: March 22, 2019





/s/ Kunal K. Singh





President and Chief
Executive Officer

(senior
officer in charge of securitization of the depositor)