Invalid definitions in systemd configuration for debian

$ sudo systemctl status mongod.service

● mongod.service - High-performance, schema-free document-oriented database

   Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)

   Active: active (running) since Sat 2016-10-15 14:02:14 JST; 5h 53min ago

     Docs: https://docs.mongodb.org/manual

 Main PID: 2985 (mongod)

   CGroup: /system.slice/mongod.service

           └─2985 /usr/bin/mongod --quiet --config /etc/mongod.conf

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:10] Failed to parse resource value, ignoring: infinity # file size

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:11] Failed to parse resource value, ignoring: infinity # cpu time

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:12] Failed to parse resource value, ignoring: infinity # virtual memory size

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:13] Failed to parse resource value, ignoring: 64000 # open files

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:14] Failed to parse resource value, ignoring: 64000 # processes/threads

Oct 15 19:55:53 tk2-218-18796 systemd[1]: [/lib/systemd/system/mongod.service:15] Maximum tasks value 'infinity # total threads (user+kernel)' invalid. Ignoring.