Rsync hangs with protocol incompatibility issues

[Anand Raman]

hi guys

Environment
2 servers (SunOS 5.8)
rsync 2.5.6

Problem
For a disaster recovery solution, we are running trying to synchornize interwoven backup stores between these 2 environments (server A and server B)

The rsync operation is initiated over the network using 'rsh'. Once initiated from server A the rsync operation freezes with no indication. When the debug flag is enabled we get to see the following error message

rsync error: protocol incompatibility (code 2) at sender.c(135)

Both servers have the same rsync version (2.5.6 protocol version 26). It is also  interesting to note is that we are able to synchronize files from server B onto server A.

Can anyone suggest pointers on how we could debug this problem.

I could provide you with more pointers if you let me know where to find them.

Thanks for your time
anand