We are facing CAS controller service down issue frequently. We checked logs on Controller & workers also. Checked the below mentioned logs and suggest the appropriate solution. 2022-07-26T13:52:37,662 INFO [03821821] MAIN NoUser MAIN [tkcsesinst.c:2160] - User sas.searchIndex attached to session 79b5f799-480c-764a-86f5-38288d51edb9. 2022-07-26T13:52:37,720 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:4504] - ++ action table.caslibInfo / srcType='all', verbose=true, showHidden=true; 2022-07-26T13:52:37,722 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:6460] - -- 'table.caslibInfo' SUCCESSFUL. 2022-07-26T13:52:37,786 INFO [03821822] MAIN NoUser MAIN [tkcalsident.c:424] - New client connection accepted on port 5570. Client IP address and port are [10.71.87.54]:47724. TLS is required. 2022-07-26T13:52:37,786 INFO [03821822] MAIN NoUser MAIN [tkident.c:1368] - User sas.searchIndex successfully authenticated using the OAuth authentication provider. 2022-07-26T13:52:37,786 INFO [03821822] MAIN NoUser MAIN [tkcsesinst.c:2160] - User sas.searchIndex attached to session 79b5f799-480c-764a-86f5-38288d51edb9. 2022-07-26T13:52:37,842 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:4504] - ++ action session.listSessions; 2022-07-26T13:52:37,844 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:6460] - -- 'session.listSessions' SUCCESSFUL. 2022-07-26T13:52:37,892 INFO [03821823] MAIN NoUser MAIN [tkcalsident.c:424] - New client connection accepted on port 5570. Client IP address and port are [10.71.87.54]:47730. TLS is required. 2022-07-26T13:52:37,893 INFO [03821823] MAIN NoUser MAIN [tkident.c:1368] - User sas.searchIndex successfully authenticated using the OAuth authentication provider. 2022-07-26T13:52:37,893 INFO [03821823] MAIN NoUser MAIN [tkcsesinst.c:2160] - User sas.searchIndex attached to session 79b5f799-480c-764a-86f5-38288d51edb9. 2022-07-26T13:52:37,949 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:4504] - ++ action session.endSession; 2022-07-26T13:52:37,951 INFO [00000007] 724065 sas.searchIndex 168143 [tkcasaimp.c:6460] - -- 'session.endSession' SUCCESSFUL. 2022-07-26T13:52:37,952 INFO [00000007] 724065 sas.searchIndex 168143 [tkcsesinst.c:835] - Destroying session 79b5f799-480c-764a-86f5-38288d51edb9. 2022-07-26T13:52:38,067 INFO [03821818] MAIN sas.searchIndex 168143 [tkcsesinst.c:835] - Destroying session 79b5f799-480c-764a-86f5-38288d51edb9. 2022-07-26T13:52:41,336 INFO [00000007] 685786 102565 167971 [tkcasaimp.c:4504] - ++ action session.endSession; 2022-07-26T13:52:41,338 INFO [00000007] 685786 102565 167971 [tkcasaimp.c:6460] - -- 'session.endSession' SUCCESSFUL. 2022-07-26T13:52:41,339 INFO [00000007] 685786 102565 167971 [tkcsesinst.c:835] - Destroying session a9638555-cbda-8548-afa5-e44bf6d63437. 2022-07-26T13:52:41,390 INFO [00000007] 691182 102565 167986 [tkcasaimp.c:4504] - ++ action session.endSession; 2022-07-26T13:52:41,391 INFO [00000007] 691182 102565 167986 [tkcasaimp.c:6460] - -- 'session.endSession' SUCCESSFUL. 2022-07-26T13:52:41,392 INFO [00000007] 691182 102565 167986 [tkcsesinst.c:835] - Destroying session 7e9c973f-933f-3741-b608-379818e3c623. 2022-07-26T13:52:41,401 INFO [00000007] 644494 112064 167767 [tkcasaimp.c:4504] - ++ action session.endSession; 2022-07-26T13:52:41,402 INFO [00000007] 644494 112064 167767 [tkcasaimp.c:6460] - -- 'session.endSession' SUCCESSFUL. 2022-07-26T13:52:41,403 INFO [00000007] 644494 112064 167767 [tkcsesinst.c:835] - Destroying session 583b06d0-f39b-544d-bfb9-329d6dc10e94. 2022-07-26T13:52:41,444 INFO [00000007] 643995 112064 167760 [tkcasaimp.c:4504] - ++ action session.endSession; 2022-07-26T13:52:41,446 INFO [00000007] 643995 112064 167760 [tkcasaimp.c:6460] - -- 'session.endSession' SUCCESSFUL. 2022-07-26T13:52:41,447 INFO [00000007] 643995 112064 167760 [tkcsesinst.c:835] - Destroying session 4ac46ff5-5fbf-ef49-9706-69045e062aef. 2022-07-26T13:52:41,502 INFO [03809207] MAIN 112064 167760 [tkcsesinst.c:835] - Destroying session 4ac46ff5-5fbf-ef49-9706-69045e062aef. 2022-07-26T13:52:41,519 INFO [03816007] MAIN 102565 167971 [tkcsesinst.c:835] - Destroying session a9638555-cbda-8548-afa5-e44bf6d63437. 2022-07-26T13:52:41,524 INFO [03816663] MAIN 102565 167986 [tkcsesinst.c:835] - Destroying session 7e9c973f-933f-3741-b608-379818e3c623. 2022-07-26T13:52:41,586 INFO [03809227] MAIN 112064 167767 [tkcsesinst.c:835] - Destroying session 583b06d0-f39b-544d-bfb9-329d6dc10e94. 2022-07-26T13:52:54,976 ERROR [03821925] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:52:54,976 ERROR [03821925] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:52:55,064 ERROR [03821911] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:52:55,064 ERROR [03821911] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:52:55,103 ERROR [03821931] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:52:55,103 ERROR [03821931] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:52:55,103 ERROR [03821912] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:52:55,103 ERROR [03821912] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:52:55,125 ERROR [03821916] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:52:55,125 ERROR [03821916] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:54:03,712 ERROR [03822247] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:54:03,712 ERROR [03822247] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:54:03,769 ERROR [03822258] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:54:03,769 ERROR [03822258] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:54:03,793 ERROR [03822253] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:54:03,793 ERROR [03822253] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:54:03,803 ERROR [03822240] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:54:03,803 ERROR [03822240] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error 2022-07-26T13:54:03,824 ERROR [03822265] MAIN NoUser MAIN [httpscomm.c:597] - Error reading HTTP header from client. 2022-07-26T13:54:03,824 ERROR [03822265] MAIN NoUser MAIN [httpscomm.c:598] - Encryption run-time execution error
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