# cat /var/log/nginx/error.log
2021/12/25 03:27:20 [alert] 3509876#3509876: ignore long locked inactive cache entry 896ea4afe7d75fae51aada8fb6643347, count:1
2021/12/25 07:57:02 [alert] 3509876#3509876: ignore long locked inactive cache entry c4008f632b145d701271b37180818fb8, count:2
2021/12/25 11:14:15 [alert] 3509876#3509876: ignore long locked inactive cache entry c5e2871d4c2314567a1960f9ad10d073, count:3
2021/12/25 12:55:22 [alert] 3509876#3509876: ignore long locked inactive cache entry f0996097b19a16ba901048bd02f27392, count:12
2021/12/25 13:35:55 [alert] 3509876#3509876: ignore long locked inactive cache entry ac59cdf58270b936105d0588eb036a04, count:12
2021/12/25 13:43:53 [alert] 3509876#3509876: ignore long locked inactive cache entry 06a24ed9b7cace543d7189bc19e27f93, count:1

# nginx -V
nginx version: nginx/1.21.4
built with OpenSSL 1.1.1f 31 Mar 2020
TLS SNI support enabled
configure arguments: --with-cc-opt='-g -O2 -fdebug-prefix-map=/build/nginx-9JOsze/nginx-1.21.4=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -Wdate-time -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -fPIC' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-compat --with-debug --with-pcre-jit --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module --with-http_slice_module --with-threads --with-http_addition_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_sub_module