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-C7 (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:



Midland
Loan Services, a Division of PNC Bank, National Association, as Master Servicer,
Midland Loan Services, a Division of PNC Bank, National Association, as Special
Servicer prior to May 10, 2023, K-Star Asset Management LLC, as Special
Servicer on and after May 10, 2023, Wells Fargo Bank, National Association, as
Trustee and Certificate Administrator, Wells Fargo Bank, National Association,
as Custodian, Pentalpha Surveillance LLC, as Operating Advisor, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Certificate Administrator, Computershare Trust Company, National Association,
as Servicing Function Participant for the Custodian, Wells Fargo Bank, National
Association, as Primary Servicer for the 245 Park Avenue Mortgage Loan, Situs
Holdings, LLC, as Special Servicer for the 245 Park Avenue Mortgage Loan,
Wilmington Trust, National Association, as Trustee for the 245 Park Avenue
Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for the 245
Park Avenue Mortgage Loan, BellOak, LLC, as Operating Advisor for the 245 Park
Avenue Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the 245 Park Avenue Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the 245 Park Avenue Mortgage Loan, Wells Fargo Bank, National Association, as
Primary Servicer for the EIP Logistics Portfolio Mortgage Loan, Rialto Capital
Advisors, LLC, as Special Servicer for the EIP Logistics Portfolio Mortgage
Loan, Wilmington Trust, National Association, as Trustee for the EIP Logistics
Portfolio Mortgage Loan, Wells Fargo Bank, National Association, as Custodian
for the EIP Logistics Portfolio Mortgage Loan, Park Bridge Lender Services LLC,
as Operating Advisor for the EIP Logistics Portfolio Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the EIP Logistics
Portfolio Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the EIP Logistics
Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Primary Servicer for the Starwood Capital Group Hotel
Portfolio Mortgage Loan, Midland Loan Services, a Division of PNC Bank,
National Association, as Special Servicer for the Starwood Capital Group Hotel
Portfolio Mortgage Loan prior to May 5, 2023, K-Star Asset Management LLC, as
Special Servicer for the Starwood Capital Group Hotel Portfolio Mortgage Loan
on and after May 5, 2023, Wells Fargo Bank, National Association, as Trustee
for the Starwood Capital Group Hotel Portfolio Mortgage Loan, Wells Fargo Bank,
National Association, as Custodian for the Starwood Capital Group Hotel
Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for
the Starwood Capital Group Hotel Portfolio Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the Starwood Capital Group Hotel Portfolio Mortgage Loan, Midland
Loan Services, a Division of PNC Bank, National Association, as Primary
Servicer for the Gateway Net Lease Portfolio Mortgage Loan, Midland Loan
Services, a Division of PNC Bank, National Association, as Special Servicer for
the Gateway Net Lease Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Trustee for the Gateway Net Lease Portfolio Mortgage Loan,
Wells Fargo Bank, National Association, as Custodian for the Gateway Net Lease
Portfolio Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor for
the Gateway Net Lease Portfolio Mortgage Loan, Computershare Trust Company,
National Association, as Servicing Function Participant for the Custodian for
the Gateway Net Lease Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the General Motors Building Mortgage Loan,
Green Loan Services LLC, as Special Servicer for the General Motors Building
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
General Motors Building Mortgage Loan, Wells Fargo Bank, National Association,
as Custodian for the General Motors Building Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the General Motors
Building Mortgage Loan, Computershare Trust Company, National Association, as
Servicing Function Participant for the Custodian for the General Motors
Building Mortgage Loan, Wells Fargo Bank, National Association, as Primary
Servicer for the Treeview Industrial Portfolio Mortgage Loan, CWCapital Asset
Management LLC, as Special Servicer for the Treeview Industrial Portfolio
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
Treeview Industrial Portfolio Mortgage Loan, Wells Fargo Bank, National
Association, as Custodian for the Treeview Industrial Portfolio Mortgage Loan,
Pentalpha Surveillance LLC, as Operating Advisor for the Treeview Industrial
Portfolio Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the Treeview Industrial Portfolio Mortgage Loan, Computershare
Trust Company, National Association, as Servicing Function Participant for the
Custodian for the Treeview Industrial Portfolio Mortgage Loan, Wells Fargo
Bank, National Association, as Primary Servicer for the Torre Plaza Mortgage
Loan, CWCapital Asset Management LLC, as Special Servicer for the Torre Plaza
Mortgage Loan, Wilmington Trust, National Association, as Trustee for the Torre
Plaza Mortgage Loan, Wells Fargo Bank, National Association, as Custodian for
the Torre Plaza Mortgage Loan, Pentalpha Surveillance LLC, as Operating Advisor
for the Torre Plaza Mortgage Loan, CoreLogic Solutions, LLC, as Servicing
Function Participant for the Torre Plaza Mortgage Loan, Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the Torre Plaza Mortgage Loan, Wells Fargo Bank, National
Association, as Primary Servicer for the First Stamford Place Mortgage Loan,
CWCapital Asset Management LLC, as Special Servicer for the First Stamford
Place Mortgage Loan, Wilmington Trust, National Association, as Trustee for the
First Stamford Place Mortgage Loan, Wells Fargo Bank, National Association, as
Custodian for the First Stamford Place Mortgage Loan, Pentalpha Surveillance
LLC, as Operating Advisor for the First Stamford Place Mortgage Loan, CoreLogic
Solutions, LLC, as Servicing Function Participant for the First Stamford Place
Mortgage Loan, Computershare Trust Company, National Association, as Servicing
Function Participant for the Custodian for the First Stamford Place Mortgage
Loan, Wells Fargo Bank, National Association, as Primary Servicer for the
Lightstone Portfolio Mortgage Loan, Argentic Services Company LP, as Special
Servicer for the Lightstone Portfolio Mortgage Loan, Wilmington Trust, National
Association, as Trustee for the Lightstone Portfolio Mortgage Loan, Wells Fargo
Bank, National Association, as Custodian for the Lightstone Portfolio Mortgage
Loan, Park Bridge Lender Services LLC, as Operating Advisor for the Lightstone
Portfolio Mortgage Loan, CoreLogic Solutions, LLC, as Servicing Function
Participant for the Lightstone Portfolio Mortgage Loan, and Computershare Trust
Company, National Association, as Servicing Function Participant for the
Custodian for the Lightstone Portfolio Mortgage Loan.







Dated: March 15, 2024





/s/
Kunal K. Singh

Kunal
K. Singh

President
and Chief Executive Officer

(senior
officer in charge of securitization of the depositor)