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 Custodian for the Prudential Plaza Mortgage
Loan, Park Bridge Lender Services LLC, as Senior Trust 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, CWCapital Asset
Management LLC, as Special 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 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 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 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 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 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 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 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 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 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 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 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 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, 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 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,
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, 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 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 23, 2020





/s/ Kunal K. Singh





President and Chief
Executive Officer

(senior
officer in charge of securitization of the depositor)