What is the maximum number of workers I can specify? I tried 2, it is working. If I use 3, it gives me error:"... (error code = 16): license checkout fail", see log detail

1 [2024.10.18 11:24:02.550463] [information] Starting master (pid = 9956)

2 [2024.10.18 11:24:02.566079] [information] Global locale: en_US

3 [2024.10.18 11:24:02.566079] [information] Global encoding: windows-1252

4 [2024.10.18 11:24:02.566079] [information] terminal encoding: IBM437

11 [2024.10.18 11:24:02.644214] [information] configuring WebFunction router

12 [2024.10.18 11:24:02.644214] [information] -- (no routes file configured) Using XHeaderMatcher for WebFunction routing

72 [2024.10.18 11:24:02.659830] [error] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Failed to read file, the CTF file may be incomplete or corrupt : "C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\A2AM.ctf" : Could not open source package

73 [2024.10.18 11:24:02.862966] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'createCTFFunctionByCommand' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\createCTFFunctionByCommand.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\createCTFFunctionByCommand_2')

76 [2024.10.18 11:24:02.862966] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "TRIAL", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

133 [2024.10.18 11:24:02.925487] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=createCTFFunctionByCommand, entries=0, exists=false

139 [2024.10.18 11:24:02.925487] [information] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] license unavailable

141 [2024.10.18 11:24:02.925487] [information] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] temporarily disabling request processing

140 [2024.10.18 11:24:02.925487] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=mps_check, entries=0, exists=false

142 [2024.10.18 11:24:02.925487] [information] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] reset current license type to be invalid

155 [2024.10.18 11:24:02.972361] [error] [License:FlexlmLicenseApi] [PTR:0000028BA4AD5910] [THREAD_POOL:license_manager_thread_pool] checkout() failed-4

156 [2024.10.18 11:24:02.972361] [error] [License:FlexlmLicenseApi] [PTR:0000028BA4AD5910] [THREAD_POOL:license_manager_thread_pool] License Checkout Error

162 [2024.10.18 11:24:02.972361] [error] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] license checkout failed

165 [2024.10.18 11:24:02.972361] [error] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] License Manager failed to start

166 [2024.10.18 11:24:02.972361] [error] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] Failed to start with error, code = 16, message = license checkout failed

167 [2024.10.18 11:24:02.972361] [error] [PTR:0000028BA4AD5910] [SERVICE:FLEXlm Client] [THREAD_POOL:license_manager_thread_pool] Failed to start; error=16 license checkout failed

175 [2024.10.18 11:24:02.972361] [error] Failed to start; error=16 license checkout failed

177 [2024.10.18 11:24:02.972361] [error] Failed to start; error=16 license checkout failed

183 [2024.10.18 11:24:03.066087] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'getlicenseinfo' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\getlicenseinfo.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\getlicenseinfo_3')

184 [2024.10.18 11:24:03.066087] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=getlicenseinfo, entries=0, exists=false

187 [2024.10.18 11:24:03.066087] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "COMM", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

188 [2024.10.18 11:24:03.284869] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'matlab_fn1' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\matlab_fn1.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\matlab_fn1_4')

189 [2024.10.18 11:24:03.284869] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=matlab_fn1, entries=0, exists=false

192 [2024.10.18 11:24:03.284869] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "COMM", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

193 [2024.10.18 11:24:03.503596] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'myMargicCtf' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\myMargicCtf.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\myMargicCtf_5')

194 [2024.10.18 11:24:03.503596] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=myMargicCtf, entries=0, exists=false

197 [2024.10.18 11:24:03.503596] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "COMM", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

198 [2024.10.18 11:24:03.706747] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'mymagic' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\mymagic.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\mymagic_6')

199 [2024.10.18 11:24:03.706747] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=mymagic, entries=0, exists=false

202 [2024.10.18 11:24:03.706747] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "TRIAL", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

203 [2024.10.18 11:24:03.909849] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] Added 'runLongTask' ('C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\auto_deploy\runLongTask.ctf' -> 'C:\MATLAB-Production-Server\dashboard-workspace\mps_workspace\Instances\mps_2\.mps_deployed\runLongTask_7')

204 [2024.10.18 11:24:03.909849] [information] -- UriPathRegexMatcher: removing old entries. operation=add, component=runLongTask, entries=0, exists=false

207 [2024.10.18 11:24:03.925486] [information] [PTR:0000028BA84FA540] [SERVICE:auto-deploy] [THREAD_POOL:auto_deploy_manager_thread_pool] The server has not acquired a license: The CTF license type "COMM", current MPS license type "INVALID" could not be validated. Request processing will be disabled until the server acquires a license.

232 [2024.10.18 11:24:03.925486] [error] [SERVICE:base services] Failed to start; error=16 license checkout failed

286 [2024.10.18 11:24:03.925486] [error] [SERVICE:base services] Failed to start with error, code = 16, message = license checkout failed

297 [2024.10.18 11:24:03.925486] [error] Failed to start; error=16 license checkout failed

Answer 1

[Sivsankar]

Hi @Biyan Li,

Your error log has ‘code = 16, message = license checkout failed’ messages which suggests that you have issue with your license manager. You can leverage the following MATLAB answer to know more about the error message:

https://www.mathworks.com/matlabcentral/answers/106144-why-do-i-receive-error-code-16-when-i-try-to-start-matlab-production-server-mps-using-mps-start

But since your MATLAB Production Server was working with 2 workers but not with 3, it might suggest that your license only allows you to have 2 workers at a time. The default is 2 to provide some degree of high availability, but you can change the count to any number you wish, as long as you keep your worker count below the number you have been licensed.

So, you might need to check your license if that is what is causing this issue. You can leverage the following MATLAB documentation to learn more about your license:

https://www.mathworks.com/help/mps/qs/license-management-for-matlab-production-server.html

Hope your query is answered.

Thanks