rsync - Oct 2004 - [Bug 1959] New: writefd_unbuffered failed to write 4092 bytes phase send_file_entry broken pipe

https://bugzilla.samba.org/show_bug.cgi?id=1959

           Summary: writefd_unbuffered failed to write 4092 bytes phase
                    send_file_entry broken pipe
           Product: rsync
           Version: 2.6.2
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P3
         Component: core
        AssignedTo: wayned@samba.org
        ReportedBy: gaurav_verma22@yahoo.com
         QAContact: rsync-qa@samba.org


we are doing rsync from server A -> B and A->C. 

A, C are running on Linux 2.4.9-e-34 and B is running on Linux 2.4.9-e-38

the following rsync command works just fine from A->B:

rsync --exclude-from /local/dba/scripts/shoprod1_exclude_applfiles.txt -rlvz -e
ssh /prod/applmgr/1159/ applprod@twnprod1:/prod/applmgr/1159/

the "same" command doesnt work from A->C:

the following rsync command works just fine from A->B:

rsync --exclude-from /local/dba/scripts/shoprod1_exclude_applfiles.txt -rlvz -e
ssh /prod/applmgr/1159/ applprod@twnprod2:/prod/applmgr/1159/

we get the followin error at different stages, e.g. build stage or after
processing a few files:

rsync: writefd_unbuffered failed to write 4092 bytes: phase
"send_file_name":
broken Pipe
rsync error: error in rsync protocol data stream (code 12) at io.c(836)

we are using rsync2.6.2 protocol version 28.

Im at a loss to understand why this is happening.

I already tried -vv option -> same error comes after processing some files
from
the exclusion file

If I use the -vvv option, it hangs on a particular command like this on server
A:

[sender] make_file(per/11.5.0/help/US/puploadw.htm,*,2)
[sender] make_file(per/11.5.0/help/US/puplorgd.htm,*,2)
--> this is where it hangs..

doing a strace on the rsync process on server A shows :

select(5,NULL, [4], NULL, {16,970000}) = 0 (Timeout)
select(5,NULL, [4], NULL, {60, 0}) = 0 (Timeout)
select(5,NULL, [4], NULL, {60, 0}) = 0 (Timeout)
..

strace on rsync process on server C shows:

select(2,NULL, [1], NULL, {29,290000}) = 0 (Timeout)
select(2,NULL, [1], NULL, {60, 0}) = 0 (Timeout)
select(2,NULL, [1], NULL, {60, 0}) = 0 (Timeout)
..

and so it hangs.. without doing anything..

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