Troubleshooting

Failed looking up symbol

A failed looking up symbol error may result from a missing libc symbol.

You can use the script scripts/check-libcfunc-avail.sh to list the required libc functions for your project.

You can add the needed function to OSv yourself, or post your error message to the osv-dev mailing list.

Example of adding a missing function

[https://github.com/cloudius-systems/osv/commit/00a2284f1c1bdfc9fb02158cbc509a75b8a47c51](libc: Add alphasort() function)

Make fail

• Symptom: make fail with no clear output

>make
  ANT tests/bench
make: *** [all] Error 1

• How to diagnose: run verbose make

make V=1

• Problem: JAVA_HOME was set to the wrong directory
• Solution: set JAVA_HOME

OSv does not boot with networking

• Symptom: OSV do not get to the shell, while starting with -n

./scripts/run.py -n -v

• How to diagnose:
  • Adding -V to the arguments to start in verbose mode. This showed that OSv got stuck on sending DHCP requests.
  • Using tcpdump to capture the packets. "tcpdump -i tap0", where tap0 is the name of the interface on virbr0 (I found it using "brctl show virbr0"). This showed that the DHCP requests were going out properly.
  • Testing if "libvirtd" daemon is running ("ps aux | grep libvirtd"). In my case, it wasn't running because my system didn't have it installed. Hope this helps.
• problem: libvirtd was not running
• Followups:
  • Explicitly validate libvirtd is available, and return meaningful output in case it does not.
  • Return return meaningful output if DHCP fail #235