null. Cas obtain license from license server
License authentication failed error when login CAS

1. Check the connection to license server, Status ok
2. Check the license server, all license for cas is available.
3. Check the cas.log in the CVM
2023-11-23 12:39:02 [INFO ] [com.h3c.licc.mgr.license.controller.LicenseController::getAllLicensesByPdtId] Ready to get all license by pdtId.
2023-11-23 12:39:02 [WARN ] [org.hibernate.engine.jdbc.spi.SqlExceptionHelper::logExceptions] SQL Error: 1, SQLState: HY000
2023-11-23 12:39:02 [ERROR] [org.hibernate.engine.jdbc.spi.SqlExceptionHelper::logExceptions] (cOnn=16961) Can"t create/write to file "/tmp/#sql-temptable-292f5-4241-1a.MAI" (Errcode: 2 "No such file or directory")
2023-11-23 12:39:02 [ERROR] [com.h3c.licc.mgr.license.controller.LicenseController::getAllLicensesByPdtId] Failed to get licsInfo by pdtId.
org.springframework.orm.jpa.JpaSystemException: could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet
It show cannot create/write to file "/tmp/
Some guy have move the /tmp/ and than move back, all the file is the same but mariadb cannot create/write it.
restart mariabd servcie and it will be re-create. And issue reolved
service mariadb restart