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Florian Weimer

2018-Feb-05 19:07 UTC

[Gluster-users] geo-replication command rsync returned with 3

On 02/05/2018 01:33 PM, Florian Weimer wrote:
> Do you have strace output going further back, at least to the proceeding 
> getcwd call?? It would be interesting to see which path the kernel 
> reports, and if it starts with "(unreachable)".
I got the strace output now, but it very difficult to read (chdir in a 
multi-threaded process ?).

My current inclination is to blame rsync because it does an 
unconditional getcwd during startup, which now fails if the current 
directory is unreachable.

Further references:

https://sourceware.org/ml/libc-alpha/2018-02/msg00152.html
https://bugzilla.redhat.com/show_bug.cgi?id=1542180

Andreas Schwab agrees that rsync is buggy:

https://sourceware.org/ml/libc-alpha/2018-02/msg00153.html

Thanks,
Florian

Kotresh Hiremath Ravishankar

2018-Feb-06 09:44 UTC

head link

[Gluster-users] geo-replication command rsync returned with 3

Hi,

As a quick workaround for geo-replication to work. Please configure the
following option.

gluster vol geo-replication <mastervol>
<slavehost>::<slavevol> config
access_mount true

The above option will not do the lazy umount and as a result, all the
master and slave volume mounts
maintained by geo-replication can be accessed by others. It's also visible
in df output.
There might be cases where the mount points not get cleaned up when worker
goes faulty and come back.
These needs manual cleaning.

Thanks,
Kotresh HR

On Tue, Feb 6, 2018 at 12:37 AM, Florian Weimer <fweimer at redhat.com>
wrote:
> On 02/05/2018 01:33 PM, Florian Weimer wrote:
>
> Do you have strace output going further back, at least to the proceeding
>> getcwd call?  It would be interesting to see which path the kernel
reports,
>> and if it starts with "(unreachable)".
>>
>
> I got the strace output now, but it very difficult to read (chdir in a
> multi-threaded process ?).
>
> My current inclination is to blame rsync because it does an unconditional
> getcwd during startup, which now fails if the current directory is
> unreachable.
>
> Further references:
>
> https://sourceware.org/ml/libc-alpha/2018-02/msg00152.html
> https://bugzilla.redhat.com/show_bug.cgi?id=1542180
>
> Andreas Schwab agrees that rsync is buggy:
>
> https://sourceware.org/ml/libc-alpha/2018-02/msg00153.html
>
>
> Thanks,
> Florian
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
>


-- 
Thanks and Regards,
Kotresh H R
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tino_maier at gmx.de

2018-Feb-07 15:02 UTC

head link

[Gluster-users] geo-replication command rsync returned with 3

Hi,
?
Kotresh workaround works for me. But before I tried it, I created some
strace-logs for Florian.
setup: 2 VMs?(192.168.222.120 master, 192.168.222.121 slave), both with a volume
named vol with Ubuntu?16.04.3,?glusterfs 3.13.2, rsync 3.1.1 .
?
Best regards,
Tino
?
root at master:~# cat /usr/bin/rsync
#!/bin/bash
strace -o /tmp/rsync.trace -ff /usr/bin/rsynco "$@"
?
One of the traces (looking all the same, execpt for memory addresses)
?
execve("/usr/bin/rsynco", ["/usr/bin/rsynco",
"-aR0", "--inplace", "--files-from=-",
"--super", "--stats", "--numeric-ids",
"--no-implied-dirs", "--existing", "--xattrs",
"--acls", "--ignore-missing-args", ".",
"-e", "ssh -oPasswordAuthentication=no "...,
"--compress", ...], [/* 7 vars */]) = 0
brk(NULL) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = 0x563d3fc3e000
access("/etc/ld.so.nohwcap", F_OK) ? ? ?= -1 ENOENT (No such file or
directory)
access("/etc/ld.so.preload", R_OK) ? ? ?= -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=24613, ...}) = 0
mmap(NULL, 24613, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7efdccfa5000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
access("/etc/ld.so.nohwcap", F_OK) ? ? ?= -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\20\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=18624, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccfa4000
mmap(NULL, 2113760, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7efdccb82000
mprotect(0x7efdccb86000, 2093056, PROT_NONE) = 0
mmap(0x7efdccd85000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) = 0x7efdccd85000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
access("/etc/ld.so.nohwcap", F_OK) ? ? ?= -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libacl.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\20\34\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=31232, ...}) = 0
mmap(NULL, 2126336, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7efdcc97a000
mprotect(0x7efdcc981000, 2093056, PROT_NONE) = 0
mmap(0x7efdccb80000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x6000) = 0x7efdccb80000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
access("/etc/ld.so.nohwcap", F_OK) ? ? ?= -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libpopt.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\360!\0\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=48240, ...}) = 0
mmap(NULL, 2143440, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7efdcc76e000
mprotect(0x7efdcc779000, 2093056, PROT_NONE) = 0
mmap(0x7efdcc978000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xa000) = 0x7efdcc978000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
access("/etc/ld.so.nohwcap", F_OK) ? ? ?= -1 ENOENT (No such file or
directory)
open("/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0P\t\2\0\0\0\0\0"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1868984, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccfa3000
mmap(NULL, 3971488, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0x7efdcc3a4000
mprotect(0x7efdcc564000, 2097152, PROT_NONE) = 0
mmap(0x7efdcc764000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1c0000) = 0x7efdcc764000
mmap(0x7efdcc76a000, 14752, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7efdcc76a000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccfa2000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccfa1000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccfa0000
arch_prctl(ARCH_SET_FS, 0x7efdccfa1700) = 0
mprotect(0x7efdcc764000, 16384, PROT_READ) = 0
mprotect(0x7efdcc978000, 4096, PROT_READ) = 0
mprotect(0x7efdccd85000, 4096, PROT_READ) = 0
mprotect(0x7efdccb80000, 4096, PROT_READ) = 0
mprotect(0x563d3e0c8000, 8192, PROT_READ) = 0
mprotect(0x7efdccfac000, 4096, PROT_READ) = 0
munmap(0x7efdccfa5000, 24613) ? ? ? ? ? = 0
rt_sigaction(SIGUSR1, {0x563d3de7c170, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {0x563d3de7ce10, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigaction(SIGCHLD, {0x563d3de7c0e0, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
geteuid() ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = 0
getegid() ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = 0
umask(0) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 022
umask(022) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
brk(NULL) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? = 0x563d3fc3e000
brk(0x563d3fc5f000) ? ? ? ? ? ? ? ? ? ? = 0x563d3fc5f000
open("/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2981280, ...}) = 0
mmap(NULL, 2981280, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7efdcc0cc000
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
open("/usr/etc/popt", O_RDONLY) ? ? ? ? = -1 ENOENT (No such file or
directory)
open("/etc/popt", O_RDONLY) ? ? ? ? ? ? = -1 ENOENT (No such file or
directory)
stat("/etc/popt.d", 0x7ffff051e980) ? ? = -1 ENOENT (No such file or
directory)
rt_sigaction(SIGINT, {0x563d3de6bac0, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigaction(SIGHUP, {0x563d3de6bac0, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigaction(SIGTERM, {0x563d3de6bac0, [], SA_RESTORER|SA_NOCLDSTOP,
0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [HUP INT USR1 USR2 TERM CHLD], NULL, 8) = 0
rt_sigaction(SIGPIPE, {SIG_IGN, [], SA_RESTORER|SA_NOCLDSTOP, 0x7efdcc3d94b0},
NULL, 8) = 0
rt_sigaction(SIGXFSZ, {SIG_IGN, [], SA_RESTORER|SA_NOCLDSTOP, 0x7efdcc3d94b0},
NULL, 8) = 0
getcwd("(unreachable)/", 4095) ? ? ? ? ?= 15
lstat(".", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
openat(AT_FDCWD, "..", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fstat(3, {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
fcntl(3, F_GETFL) ? ? ? ? ? ? ? ? ? ? ? = 0x8000 (flags O_RDONLY|O_LARGEFILE)
fcntl(3, F_SETFD, FD_CLOEXEC) ? ? ? ? ? = 0
mmap(NULL, 135168, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x7efdccf7f000
getdents(3, /* 6 entries */, 131072) ? ?= 168
getdents(3, /* 0 entries */, 131072) ? ?= 0
lseek(3, 0, SEEK_SET) ? ? ? ? ? ? ? ? ? = 0
getdents(3, /* 6 entries */, 131072) ? ?= 168
newfstatat(3, "test", {st_mode=S_IFDIR|0755, st_size=4096, ...},
AT_SYMLINK_NOFOLLOW) = 0
newfstatat(3, ".trashcan", {st_mode=S_IFDIR|0755, st_size=4096, ...},
AT_SYMLINK_NOFOLLOW) = 0
getdents(3, /* 0 entries */, 131072) ? ?= 0
munmap(0x7efdccf7f000, 135168) ? ? ? ? ?= 0
close(3) ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?= 0
write(2, "rsync: getcwd(): No such file or"..., 46) = 46
write(2, "\n", 1) ? ? ? ? ? ? ? ? ? ? ? = 1
rt_sigaction(SIGUSR1, {SIG_IGN, [], SA_RESTORER, 0x7efdcc3d94b0}, NULL, 8) = 0
rt_sigaction(SIGUSR2, {SIG_IGN, [], SA_RESTORER, 0x7efdcc3d94b0}, NULL, 8) = 0
write(2, "rsync error: errors selecting in"..., 96) = 96
write(2, "\n", 1) ? ? ? ? ? ? ? ? ? ? ? = 1
exit_group(3) ? ? ? ? ? ? ? ? ? ? ? ? ? = ?
+++ exited with 3 +++
?
?

Gesendet:?Dienstag, 06. Februar 2018 um 10:44 Uhr
Von:?"Kotresh Hiremath Ravishankar" <khiremat at redhat.com>
An:?"Florian Weimer" <fweimer at redhat.com>
Cc:?"Gluster Users" <gluster-users at gluster.org>
Betreff:?Re: [Gluster-users] geo-replication command rsync returned with 3

Hi,
?As a quick workaround for geo-replication to work. Please configure the
following option.
?gluster vol geo-replication <mastervol>
<slavehost>::<slavevol> config access_mount true
?The above option will not do the lazy umount and as a result, all the master
and slave volume mountsmaintained by geo-replication can be accessed by others.
It's also visible in df output.There might be cases where the mount points
not get cleaned up when worker goes faulty and come back.These needs manual
cleaning.
?Thanks,Kotresh HR
?
On Tue, Feb 6, 2018 at 12:37 AM, Florian Weimer <fweimer at
redhat.com[mailto:fweimer at redhat.com]> wrote:On 02/05/2018 01:33 PM,
Florian Weimer wrote:
?Do you have strace output going further back, at least to the proceeding getcwd
call?? It would be interesting to see which path the kernel reports, and if it
starts with "(unreachable)".
I got the strace output now, but it very difficult to read (chdir in a
multi-threaded process ?).

My current inclination is to blame rsync because it does an unconditional getcwd
during startup, which now fails if the current directory is unreachable.

Further references:

https://sourceware.org/ml/libc-alpha/2018-02/msg00152.html[https://sourceware.org/ml/libc-alpha/2018-02/msg00152.html]
https://bugzilla.redhat.com/show_bug.cgi?id=1542180

Andreas Schwab agrees that rsync is buggy:

https://sourceware.org/ml/libc-alpha/2018-02/msg00153.html[https://sourceware.org/ml/libc-alpha/2018-02/msg00153.html]

Thanks,
Florian
_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org[mailto:Gluster-users at gluster.org]
http://lists.gluster.org/mailman/listinfo/gluster-users


--

Thanks and Regards,Kotresh H R_______________________________________________
Gluster-users mailing list Gluster-users at gluster.org
http://lists.gluster.org/mailman/listinfo/gluster-users[http://lists.gluster.org/mailman/listinfo/gluster-users]
?
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