Not sure if this is helpful, but the output of strace shows it stuck
in some timeout loop:
stat("/var/lib/backuppc/cpool/7e/4e/7e4e672bd913eadb030d0670aecb6607",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/3a/e2/3ae2b652d5cda073df7af75d3bb3ecdf",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/40/0e/400e7dbed090db12fb6594f1d995453c",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/4e/4c/4e4ce2f7453a6b8285ea282dd4ca6bb3",
{st_mode=S_IFREG|0444, st_size=190164, ...}) = 0
openat(AT_FDCWD,
"/var/lib/backuppc/cpool/4e/4c/4e4ce2f7453a6b8285ea282dd4ca6bb3", O_RDONLY) = 5
read(5,
"\327^\354\275y\274OU\374\377\273\327\376\234c\36\216cH\"\307P\35\241\216)ceJTB\224"...,
1048576) = 190164
lseek(5, 4294963247, SEEK_CUR) = 4295153411
close(5) = 0
stat("/var/lib/backuppc/cpool/be/18/bf198d5310385ead4db2766a72b9d4ba",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/f0/d4/f0d424b17f2f7f3433dc5342914b34e2",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/b8/d2/b8d2df95db0c551243995e9c21cc25d8",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/1e/48/1e48b92e7b83c639c0b9c91bd1dea36b",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/f4/12/f4132159f1faa93cc13f97b5c68e50b7",
{st_mode=S_IFREG|0444, st_size=1891951, ...}) = 0
openat(AT_FDCWD,
"/var/lib/backuppc/cpool/f4/12/f4132159f1faa93cc13f97b5c68e50b7", O_RDONLY) = 5
read(5,
"\327^\34\335\5\264\226\305\326\0\340\27\220n\20P\272\301\2E\340\4\240\202\200\202\200\264t7H\227"...,
1048576) = 1048576
read(5,
"\255\27\34\302k\36\360\250w#b\337?\356\347\355\341\24\217&\331\212\374\33\217z\v'(nw\212"...,
1048576) = 843375
lseek(5, 4294918507, SEEK_CUR) = 4296810458
close(5) = 0
stat("/var/lib/backuppc/cpool/54/c2/55c2de84e63acd671a594810eaed936f",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/0e/e0/0fe128c150b7b6166b506369af2bbcbd",
0x7ffe64b62770) = -1 ENOENT (No such file or directory)
stat("/var/lib/backuppc/cpool/ea/6c/eb6d1bf9f9cd4e77223eaa01eb66bdd4",
{st_mode=S_IFREG|0444, st_size=2696355, ...}) = 0
openat(AT_FDCWD,
"/var/lib/backuppc/cpool/ea/6c/eb6d1bf9f9cd4e77223eaa01eb66bdd4", O_RDONLY) = 5
read(5,
"\327^\34\335\5\220VG\266\0\340\37\367\340\t\20\10\226\20$H\200@\202\5\33\301\335\t\356\356\356"...,
1048576) = 1048576
read(5,
"\34\2129\0027\27@{~\267\203\\\310\226g\270\337F\236\303l\205y\nf!\346I\320\v\372\363"...,
1048576) = 1048576
read(5,
"\246\371\367k%Ho\3\361\224\250S\237\334\276\354NG8\214(\267\322C\325P'\250\223A\33F"...,
1048576) = 599203
lseek(5, 4294905847, SEEK_CUR) = 4297602202
close(5) = 0
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 1 (in [3], left
{tv_sec=59, tv_usec=999998})
read(3, "\360_;\247\355\247\355& \n\35oogle.android.apps.cl"..., 21239) =
2565
brk(0x559d8261b000) = 0x559d8261b000
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
write(2, "IOrename: 16 .cid.info.000000.ci"..., 39) = 39
write(2, "IOrename: 22 .layout_version.000"..., 51) = 51
write(2, "IOrename: 11 .rev.000000.rev\n", 29) = 29
write(2, "IOrename: 20 .wifiver.info.00000"..., 47) = 47
write(2, "IOrename: 19 .ash_history.000000"..., 44) = 44
write(2, "IOrename: 15 .cal.bin.000000cal."..., 36) = 36
write(2, "IOrename: 25 .hidden_volume.txt."..., 56) = 56
write(2, "IOrename: 27 .smart_stay_hash.dm"..., 60) = 60
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
select(5, [3], [4], [3], {tv_sec=60, tv_usec=0}) = 0 (Timeout)
...
...
...
Any suggestions on how to further troubleshoot this?
[email protected] wrote at about 20:55:22 -0500 on Saturday, January 22,
2022:
> Need to take this back.
> It has nothing to do with the cam_socket.
> It gets "stuck" at varying places... as IO slows to a complete halt
> (based on iftop) until rsync timesout.
> Similarly, 'strace' stalls.
>
> This happens even if I run rsync_bpc from the command line directly,
> but it does *not* happen when I use native rsync with the comparable
> options.
>
> Any ideas on how to debug this further?
>
> "" wrote at about 15:02:17 -0500 on Friday, January 21, 2022:
> > Based on the log file generated by the (equivalent) "naked" rsync
> > backup
> >
> > log: recv cS+++++++++ rwxrwx--- 1006, 1006 0 cam_socket0
> > log: recv cS+++++++++ rwxrwx--- 1006, 1006 0 cam_socket1
> > log: recv >f+++++++++ rwx------ 1000, 1000 8
> hidden_volume.txt
> >
> > it seems like it gets stuck somewhere between backing up
> > 'cam_socket1' and 'hidden_volume.txt' since the last BackupPC log line
> > I see is:
> > recv cS+++++++++ rwxrwx--- 1006, 1006 0 cam_socket1
> >
> > If the problem is backing up a 'socket', the problem is not in native
> > rsync as it proceeds fine but rather presumably in rsync_bpc.
> >
> >
> > "" wrote at about 13:41:35 -0500 on Friday, January 21, 2022:
> > > I have long been able to back up my (rooted) Android phones using
> > > ssh/rsync.
> > > I also have no problem backing up my Windows and Linux machines.
> > >
> > > However, BackupPC timesout when I try to back up an old Samsung S3
> (which
> > > used to back up perfectly before). The timeout occurs no matter what
> > > value I use even though the total backup size is only about 5.2 GB.
> > >
> > > The corresponding rsync_bpc client command is:
> > > /usr/bin/rsync_bpc --bpc-top-dir /var/lib/backuppc --bpc-host-name
> droidtestmachine --bpc-share-name /data --bpc-bkup-num 0 --bpc-bkup-comp 3
> --bpc-bkup-prevnum -1 --bpc-bkup-prevcomp -1 --bpc-bkup-inode0 6621
> --bpc-log-level 1 --bpc-attrib-new -e /usr/bin/ssh -p 22 -l u0_a500
> --rsync-path=PATH=su\ -lpc\ /data/mybin/rsync --super --recursive
> --protect-args --numeric-ids --perms --owner --group -D --times --links
> --hard-links --delete --delete-excluded --one-file-system --partial
> --log-format=log: %o %i %B %8U,%8G %9l %f%L --stats --checksum
> --timeout=72000 --exclude=media/0/Download/Temp/* droidy:/data/ /
> > >
> > > And the corresponding rsync (remote) server command on the android
> host is:
> > > 20298 10500 0:00 su -lpc /data/mybin/rsync --server --sender
> -slHogDtprcxe.iLsfxC
> > > 20373 0 0:52 /data/mybin/rsync --server --sender
> -slHogDtprcxe.iLsfxC
> > >
> > > Interestingly, I can successfully manually run the same rsync
> > > command directly by invoking rsync with the above parameters and the
> > > rsync completes successfully in just a couple of hours (far less than
> the
> > > timeout).
> > >
> > > The corresponding rsync client command is:
> > > sudo rsync -e /usr/bin/ssh\ -p\ 22\ -l\ u0_a500 --rsync-path=su\
> -lpc\ /data/mybin/rsync --super --recursive --protect-args --numeric-ids
> --perms --owner --group -D --times --links --hard-links --delete
> --delete-excluded --one-file-system --partial --log-format=log:\ %o\ %i\ %B\
> %8U,%8G\ %9l\ %f%L --stats --checksum --timeout=72000
> --exclude=media/0/Download/Temp/\* droidy:/data/ /tmp/droid-backup
> > >
> > > And the corresponding rsync server command on the (remote) android
> > > host is exactly as above.
> > >
> > > Since 'manual' rsync works, the problem is presumably *NOT*
> > > - The android phone
> > > - The setup of ssh and rsync on the phone
> > > - The files on the phone
> > > - The connection between the phone and the Linux machine invoking
> > > rsync or rsync_bpc
> > >
> > > Also, since my BackupPC server otherwise works fine, there is
> > > presumably nothing fundamentally wrong with my BackupPC installation.
> > >
> > > Finally, since at least some files are transferred (according to the
> > > BackupPC logs) before the timeout, there is no problem with the ssh
> > > keys for the android connection.
> > >
> > >
> > > So, why would rsync_bpc timeout but not when I run straight rsync?
> > > i.e., what is rsync_bpc doing differently that would cause a hang?
> > >
> > >
> > > _______________________________________________
> > > BackupPC-users mailing list
> > > [email protected]
> > > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
> > > Wiki: https://github.com/backuppc/backuppc/wiki
> > > Project: https://backuppc.github.io/backuppc/
> >
> >
> > _______________________________________________
> > BackupPC-users mailing list
> > [email protected]
> > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
> > Wiki: https://github.com/backuppc/backuppc/wiki
> > Project: https://backuppc.github.io/backuppc/
>
>
> _______________________________________________
> BackupPC-users mailing list
> [email protected]
> List: https://lists.sourceforge.net/lists/listinfo/backuppc-users
> Wiki: https://github.com/backuppc/backuppc/wiki
> Project: https://backuppc.github.io/backuppc/
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