https://bugzilla.samba.org/show_bug.cgi?id=8315
Summary: hang in rsync (match.c)
Product: rsync
Version: 3.0.9
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P5
Component: core
AssignedTo: wayned at samba.org
ReportedBy: jeremy at jeremysanders.net
QAContact: rsync-qa at samba.org
I think I'm hitting a hang in rsync. I'm using rev
c0d07c098724ee8c382a498cab991f7d8467d778 in the b3.0.x branch.
The command is:
rsync -raHx --stats --inplace --no-whole-file --delete
/xback2_back1/home_rcr36/20110707-000502/ /mnt/btrfs/home_rcr36/current/
Where both file systems are local. Running strace on the process shows no
activity. The hanging process is the rsync with the lowest PID.
I attached gdb to the hanging rsync. Here is the back trace:
0x000000000041e5c4 in hash_search (f=4, s=0xcc1ec0, buf=0xcc1ef0,
len=2000967340) at match.c:211
211 if (updating_basis_file &&
s->sums[i].offset <
offset
(gdb) back
#0 0x000000000041e5c4 in hash_search (f=4, s=0xcc1ec0, buf=0xcc1ef0,
len=2000967340) at match.c:211
#1 match_sums (f=4, s=0xcc1ec0, buf=0xcc1ef0, len=2000967340) at match.c:369
#2 0x0000000000414491 in send_files (f_in=5, f_out=4) at sender.c:337
#3 0x000000000041cd96 in client_run (f_in=5, f_out=4, pid=15684, argc=1,
argv=0xcac240) at main.c:1039
#4 0x000000000041d455 in start_client (argc=2, argv=0xcac240) at main.c:1287
#5 main (argc=2, argv=0xcac240) at main.c:1514
The system is Fedora Linux 14 x86-64. I continued the program and reattached
the debugger. It was stuck in the same place.
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https://bugzilla.samba.org/show_bug.cgi?id=8315
Wayne Davison <wayned at samba.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
--- Comment #1 from Wayne Davison <wayned at samba.org> 2011-07-22
18:26:02 UTC ---
Is it hung? Or just making very slow progress? Is the variable
"offset"
changing? If not, check if there is a loop in the s->sums[i].chain data.
Each
value in "chain" gives you a new "i", which should
eventually lead to a chain <
0.
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Jeremy Sanders <jeremy at jeremysanders.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |INVALID
--- Comment #2 from Jeremy Sanders <jeremy at jeremysanders.net>
2011-07-22 20:08:47 UTC ---
I'm sorry - it wasn't a complete hang. It finished 30 mins later when I
finally
let it finish the file. It was just rather slow processing a 2GB file mostly
filled with zeros.
I'll close the bug.
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