All of a sudden (not sure when the problem started) my rsync commands against a given machine get stuck:$ (dd bs=1024 count=1024 </dev/urandom >/tmp/temp_file && rsync -arvvv --progress /tmp/temp_file -e ssh hostname.sldc.company.net:/tmp/)1024+0 records in1024+0 records out1048576 bytes transferred in 0.087832 secs (11938431 bytes/sec)opening connection using: ssh hostname.sldc.company.net rsync --server -vvvlogDtpre.iLsfx . /tmp/  (7 args)I have the same exact problem without -e ssh returning the same exact error (including the ssh bit, which I wouldn't expect)$ (dd bs=1024 count=1024 </dev/urandom >/tmp/temp_file && rsync -arvvv --progress /tmp/temp_file analytics04.sldc.dataxu.net:/tmp/)1024+0 records in1024+0 records out1048576 bytes transferred in 0.086265 secs (12155310 bytes/sec)opening connection using: ssh hostname.sldc.company.net rsync --server -vvvlogDtpre.iLsfx . /tmp/  (7 args)Note: No one else in my company has this problem, and I do not have this problem with any other machine either or with this machine and a different user name. I can also ssh into the machine without problem.What can I do to diagnose the problem? Platform and versions:This is all on OS X Yosemite with:$ uname -aDarwin my_machine.net 14.3.0 Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64and:$ rsync --versionrsync  version 3.1.1  protocol version 31Copyright (C) 1996-2014 by Andrew Tridgell, Wayne Davison, and others.Web site: http://rsync.samba.org/Capabilities:    64-bit files, 64-bit inums, 64-bit timestamps, 64-bit long ints,    socketpairs, hardlinks, symlinks, IPv6, batchfiles, inplace,    append, ACLs, xattrs, iconv, symtimes, no prealloc, file-flagsrsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and youare welcome to redistribute it under certain conditions.  See the GNUGeneral Public Licence for details.which I installed with brew. I also had the same problem with the version of rsync that comes with OS X:$ rsync --versionrsync  version 2.6.9  protocol version 29Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.<http://rsync.samba.org/>Capabilities: 64-bit files, socketpairs, hard links, symlinks, batchfiles,              inplace, IPv6, 64-bit system inums, 64-bit internal inumsrsync comes with ABSOLUTELY NO WARRANTY.  This is free software, and youare welcome to redistribute it under certain conditions.  See the GNUGeneral Public Licence for details.DTracing the command:This gist shows the first part what I get by running the following command:sudo dtruss rsync -arvvv temp_file username@XX.YY.ZZ.VVV:/tmp/then immediately after the last line in the Gist above, I am asked my password:username@XX.YY.ZZ.VVV's password:select(0x6, 0x7FFF50052860, 0x0, 0x7FFF500527E0, 0x7FFF500528F8)                 = 0 0select(0x6, 0x7FFF50052860, 0x0, 0x7FFF500527E0, 0x7FFF500528F8)                 = 0 0select(0x6, 0x7FFF50052860, 0x0, 0x7FFF500527E0, 0x7FFF500528F8)                 = 0 0select(0x6, 0x7FFF50052860, 0x0, 0x7FFF500527E0, 0x7FFF500528F8)                 = 0 0(every ~ 60 seconds or so, a new line identical to the last one above one is printed)
rsync -vvv gets stuck in OS X with no clear explanation
osx;rsync