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server keeps crashing using mongodb

Posted April 7, 2017 5k views
UbuntuDigitalOcean

I use this command to hang up a mongodb in background and set dbpath to mount:

sudo mongod –dbpath /mnt/volume-nyc1-04/mongodata2 –fork –logpath /var/log/mongod.log –bind_ip 127.0.0.1

this works well for mongodata, but for mongodata2 whenever i type into command line the whole server just keep crashing and i have to log into console and power on.

This mongodata2 is a large db (300GB) with large collection (3billion rows). I am wondering what could cause the server crashing?

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adrian3118b6a2c
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2 answers
Woet April 7, 2017

Why are you running mongodb as root? What do you mean by “crashing”? Did you check the logs?

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  • adrian3118b6a2c April 7, 2017

    I tried mongod without sudo, it crashes as well.
    crashing means the whole system just went down, like shut down.
    which log should I check? I have checked one of them, it simply says ‘crash’, nothing else

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hansen April 7, 2017

Hi @adrian3118b6a2c

If the server reboots, meaning kernel crash, then you should find some information in /var/log/kern.log
https://help.ubuntu.com/community/DebuggingSystemCrash#log_files

But you’re using MongoDB incorrect. You shouldn’t run it as root - never. And if you run multiple MongoDBs at the same time, you need to set different PID, dataPath, listen address, etc.

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