I've pushed successfully, but I got an error message "error: failed to push..." in git

Hi all,

I've pushed many commits successfully, but I got an error message "error: failed to push some refs" every git-push. I have no idea about this message. Could someone tell me what happened? How do I fix this issue?

Thanks!

The following is the log of my git-push.

[jinuu@foonlean source]$ git push
foonlean@172.16.12.17's password:
Counting objects: 15, done.
Compressing objects: 100% (8/8), done.
Writing objects: 100% (8/8), 908 bytes, done.
Total 8 (delta 6), reused 0 (delta 0)
To foonlean@172.16.12.17:Repository/source
ab5be38..d2f8993 master -> master
error: failed to push some refs to 'foonlean@172.16.12.17:Repository/source'

From stackoverflow

• you have to pull first. Then push.

  BBetances : Sometimes you also have to lift a bit to un-snag it.

• Force the push:

  git push --force
  

  You won't have to merge the differences, but you could lose some history on your local commits.