Bug - svn hangs

Hello, I am experiencing a problem for which I cannot see solution nor
better way to investigate my case than writing to you.

I am a java developer so I may not know low level details, but if
instructed I may provide them.

Client: Ubuntu 17.10, svn version is 1.9.7 (r1800392) - official repository

Server: CentOs running collabnet svnserve 1.8.0

I started working ok with some 5 repository, but suddenly (after weeks)
happens that two of them gets "blocked", I mean, svn ls or update
commands hangs indefinitely without prompting any kind of message. What
is really strange is that is happening only on some subdirectories on
that  repositories, and if I try with other pc (ie Windows with
TortoiseSvn), everything seems all right. I was not able to obtain any
useful info nor logs on server, I think it is definitively a client
problem but no idea where to look for more infos.

I am blocked by this problem and cannot go on working with my pc.

Thanks for your help!

Luca

-- 
Luca /--Sent from my Pigeon Post/