Whats the core file


#1

Hi,

I’m having a node where main disc is close to being used

I noticed the existence of a core file, that is quite large, around 4 gigs

ubuntu@ip-10-35-142-176:/opt/couchbase/var/lib/couchbase$ ls -all -h total 4.0G drwxr-xr-x 6 couchbase couchbase 4.0K Nov 18 07:14 . drwxr-xr-x 4 couchbase couchbase 4.0K Oct 2 08:20 .. drwxr-xr-x 2 couchbase couchbase 4.0K Nov 15 10:49 config -rw-r----- 1 couchbase couchbase 4.0G Nov 17 20:03 core ..

Is that a kind of dump file from a crash? Can it be deleted or moved without any problems

Best Regards
Niels


#2

Hello,

Yes this is probably a dump from a process crash. Hard to say what this the source of it without analysis.
You can delete it but it would be nice to see what is causing this.

So you can

  • run “file” against each of them so we can see what process it’s from
  • then, based on that, we may want to get him to run gdb to extract the backtrace and file an issue
    gdb path_to_binary core_file
    thread apply all bt
    ctrl-D

Also provide some detailed information about your environment such as:

  • OS and hardware
  • Couchbase version and configuration

Regards
Tug
@tgrall


#3

Thanks, will try to follow the steps and post result here

/Niels


#4

Ok, I did ran file and got the following output

/mnt/dump-files/core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from ‘/opt/couchbase/lib/erlang/erts-5.8.5/bin/beam.smp -A 16 -sbt u -P 327680 -K tru’

Are you interested in more info


#5

I’m running Version: 2.2.0 enterprise edition (build-821) on aws large instances