Tried multiple times to join this server on 1.7.9 and many other servers but it seems to crash everytime i do so.
MC-108944
Crashes when trying to join a server
Resolved
Invalid
0
Is this one 1.7.9 or 16w42a?
If this is the former, then your version is outdated.
If this is the latter, then please provide more details, such as (but not limited to) crash logs.