MongoDB Startup related issues

after upgrading the company MongoDB, unable to start . To view the log, the following appears:

2016-11-29t14:22:09.382+0800 E NETWORK [Initandlisten] Failed to unlink socket File/tmp/mongodb-27029.sock errno:1 Opera tion not permitted

650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M00/8B/62/wKiom1hLnAWBQVAVAACeLsThXNo225.png-wh_500x0-wm_3 -wmp_4-s_289504206.png "title=" screen shot 2016-11-29 14.31.02.png "alt=" Wkiom1hlnawbqvavaacelsthxno225.png-wh_50 "/>

The/tmp/mongodb-27-29.sock file in the prompt is as follows:

650) this.width=650; "Src=" Http://s2.51cto.com/wyfs02/M01/8B/62/wKiom1hLnBzxTbEAAAC2PzMj3uc952.png-wh_500x0-wm_3 -wmp_4-s_84721211.png "title=" screen shot 2016-11-29 14.31.14.png "alt=" Wkiom1hlnbzxtbeaaac2pzmj3uc952.png-wh_50 "/>

View the Mongod process has disappeared, but the sock file is still in, decide to delete the file as follows:

650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/8B/5F/wKioL1hLnDOhgWaZAAC23oqBu14047.png-wh_500x0-wm_3 -wmp_4-s_1638433020.png "title=" screen shot 2016-11-29 14.31.34.png "alt=" Wkiol1hlndohgwazaac23oqbu14047.png-wh_50 "/>

Start Mongod again and notice that the system prompts the PID file to already exist as follows:

650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M01/8B/62/wKiom1hLnEWgxPezAABwXbFVKDY181.png-wh_500x0-wm_3 -wmp_4-s_3771372030.png "title=" screen shot 2016-11-29 14.31.57.png "alt=" Wkiom1hlnewgxpezaabwxbfvkdy181.png-wh_50 "/>

Decide to delete the PID file as follows:

650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M02/8B/62/wKiom1hLnFmDcIQXAADx8_bHcn0021.png-wh_500x0-wm_3 -wmp_4-s_1200199101.png "title=" screen shot 2016-11-29 14.32.13.png "alt=" Wkiom1hlnfmdciqxaadx8_bhcn0021.png-wh_50 "/>

Start Mongod again and start smoothly.

Remember the last time I didn't use the service mongod Start command when I started Mongod, I used the Mongod--config/etc/mongod.conf command, which prevented Mongod from starting and then using service Mongod STA RT also fails to start. Because when I use the Mongod--config/etc/mongod.conf command, the process generates a wiredtiger.* file in the data directory as the root user, causing the service Mongod start to fail to start. Tip: When you start mongod using the service mongod Start command Normally, you are operating as a mongod user, not root

This article from "11462293" blog, declined reprint!

MongoDB Startup related issues