AUTHCACHE Cannot get random stream from TMM

I found below log in httpd, but i haven't found any bug related to this problem. So i ask here. thank you!

Mar 2 07:33:01 hh-1600 httpd[23972]: [error] jk2_init() Can't find child 23972 in scoreboard Mar 2 07:33:01 hh-1600 httpd[23972]: [error] mod_jk child init 1 -2 Mar 2 12:39:09 hh-1600 httpd[28261]: [error] jk2_init() Can't find child 28261 in scoreboard Mar 2 12:39:09 hh-1600 httpd[28261]: [error] mod_jk child init 1 -2 Mar 2 13:04:40 hh-1600 httpd[28637]: [error] mod_jk child init 1 0 Mar 2 14:46:42 hh-1600 httpd[28637]: [error] [client 10.3.69.232] AUTHCACHE Cannot get random stream from TMM Mar 2 14:46:42 hh-1600 httpd[28261]: [error] [client 10.3.69.232] no acceptable variant: /usr/local/www/error/HTTP_UNAUTHORIZED.html.var, referer: https://10.2.185.82/tmui/Control/jspmap/tmui/overview/welcome/introduction.jsp Mar 2 16:35:56 hh-1600 httpd[28261]: [error] [client 10.3.69.232] no acceptable variant: /usr/local/www/error/HTTP_UNAUTHORIZED.html.var, referer: https://10.2.185.82/tmui/Control/jspmap/tmui/overview/welcome/introduction.jsp Mar 2 16:35:56 hh-1600 httpd[31589]: [error] jk2_init() Can't find child 31589 in scoreboard Mar 2 16:35:56 hh-1600 httpd[31589]: [error] mod_jk child init 1 -2