Unexpected Tag Errors - Solution

Bradley Kite kitebr at alchemetrics.co.uk
Thu Sep 19 12:44:01 EST 2002

Hi all.

After weeks of debugging etc. I found the problem.

It would seem like its a compiler error on SCO, because in line 286 of io.c
read_unbuffered() - it declares a 'static' variable (type size_t) called
and while the ANSI standard says that static vars are automatically
to zero, it would seem that this is not always the case. By explicitly
intialising the variable to zero yourself, it would seem to solve the


Line 286 of io.c from:
    static size_t remaining;
    static size_t remaining = 0;

Really confused, but it seems to work so I'm not going to argue with it :-)


-----Original Message-----
From: Bradley Kite [mailto:kitebr at alchemetrics.co.uk] 
Sent: 10 September 2002 11:02
To: 'rsync at samba.org'
Subject: Unexpected Tag Errors

Hi everyone.

I'm running an rsync (2.5.6-cvs) between 2 SCO Unix boxes (SCO_SV 3.2 5.0.5
i386), and keep getting aparently random "unexpected tag" errors. If I
re-run rsync when this error occurs everything will usually go OK (even if
it takes 2 or 3 runs on the same data...)

Could somebody please explain what a "tag" is (looking through the code it's
derived from the first 4bytes of each read_unbuffered() call and I think its
to do with multiplexing, but what are all of the multiplexing "sub-channels"
used for? (seem to be defined as FNONE=0, FERROR=1, FINFO=2, FLOG=3).

Has any body else encountered these errors?

Any advise much appreciated!

Bradley Kite
Software Developer/Data Management Specialist
alchemetrics - smarter data, faster
Tel: 0118 902 9043 (direct line)
Email: bradley.kite at alchemetrics.co.uk
Web: http://www.alchemetrics.co.uk
QuickCounts Demo: http://www.quickcounts.co.uk

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