[Lazarus] Cannot save file to NFS mounted path

[Leonardo M. Ramé]

Hi, I'm using TFileStream to save files. It works without issues when 
writing to my filesystem, but hangs (does not return) when the path is a 
mounted NFS one.

I must add the user has write permissions on the mounted path, in fact 
before posting this I've tried creating a text file without using 
TFileStream and it worked without an issue, so I assume the problem is 
with TFileStream:

     // This works:

     AssignFile(f, '/mnt/data_vultr/documents/test.txt');
     {$I-}
     Rewrite(f);
     {$I+}
     if IOResult =0 then
     begin
       System.WriteLn(f, 'aaaa');
       System.WriteLn(f, 'bbb');
     end;
     System.Close(f);


     // this doesn't work

     lFileStream := TFileStream.Create(lFile, fmCreate);
     AMemStream.Position := 0;
     lFileStream.CopyFrom(AMemStream,AMemStream.Size);


The program is a CGI running on Ubuntu Server 14.04 x64.
Lazarus 1.7 compiled from trunk on 2016-05-13 (SVN 52282M)
FPC 3.1.1

Regards,
-- 
Leonardo M. Ramé
Medical IT - Griensu S.A.
Av. Colón 636 - Piso 8 Of. A
X5000EPT -- Córdoba
Tel.: +54(351)4246924 +54(351)4247788 +54(351)4247979 int. 19
Cel.: +54 9 (011) 40871877