mongod src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp no file - mongodb

Question

I've really been all over StackOverflow on this and couldn't find a solution. I have uninstalled Homebrew and Mongo via, well, brew. Nothing seems to fix it. Any help would be much appreciated.
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] MongoDB starting : pid=7684 port=27017 dbpath=/data/db 64-bit host=Matts-MacBook-Pro.local
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] db version v3.4.6
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] git version: c55eb86ef46ee7aede3b1e2a5d184a7df4bfb5b5
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2l 25 May 2017
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] allocator: system
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] modules: none
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] build environment:
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] distarch: x86_64
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] target_arch: x86_64
2017-08-03T20:29:40.017-0400 I CONTROL [initandlisten] options: {}
2017-08-03T20:29:40.018-0400 I STORAGE [initandlisten] wiredtiger_open config: create,cache_size=3584M,session_max=20000,eviction=(threads_min=4,threads_max=4),config_base=false,statistics=(fast),log=(enabled=true,archive=true,path=journal,compressor=snappy),file_manager=(close_idle_time=100000),checkpoint=(wait=60,log_size=2GB),statistics_log=(wait=0),
2017-08-03T20:29:40.019-0400 E STORAGE [initandlisten] WiredTiger error (2) [1501806580:19955][7684:0x7fffbdc783c0], file:WiredTiger.wt, connection: /data/db/WiredTiger.wt: handle-open: open: No such file or directory
2017-08-03T20:29:40.029-0400 I - [initandlisten] Assertion: 28595:2: No such file or directory src/mongo/db/storage/wiredtiger/wiredtiger_kv_engine.cpp 269
2017-08-03T20:29:40.029-0400 I STORAGE [initandlisten] exception in initAndListen: 28595 2: No such file or directory, terminating
2017-08-03T20:29:40.029-0400 I NETWORK [initandlisten] shutdown: going to close listening sockets...
2017-08-03T20:29:40.029-0400 I NETWORK [initandlisten] removing socket file: /tmp/mongodb-27017.sock
2017-08-03T20:29:40.029-0400 I NETWORK [initandlisten] shutdown: going to flush diaglog...
2017-08-03T20:29:40.029-0400 I CONTROL [initandlisten] now exiting
2017-08-03T20:29:40.029-0400 I CONTROL [initandlisten] shutting down with code:100

Answer 1

I also have to spent more than 4 hours to find a solution you asked. In my case, the stack trace is same as in your case.
I used MongoDB 4.2. But I need to downgrade it to MongoDB 3.4. After downgrading to 3.4 above error can be seen. Then again I updated MongoDB to 4.2. Still there was that error.
Tried many solutions on Stack Overflow but nothing solved my issue. As my final option I run below command.
mongod --dbpath /data/db --repair
But it also did not work.
There were some files on my /data/db directory.
Those are WiredTiger, WiredTiger.lock, WiredTiger.turtle, diagnostic.data, journal and mongod.lock.
Removed all the files in /data/db directory.
rm -rf /data/db/*
Run above command with sudo if you are not the root user.
Then I run mongod --dbpath /data/db --repair command again.
Then I could start MongoDB successfully by running mongod --dbpath /data/db.
Do not forget add bin/mongod to PATH in .bash_profile(If you are using Mac).