[Duplicity-talk] pty.fork() failed: [Errno 12] Cannot allocate memory

[Igor Balic]

Hello,

 

we're having some problems with duplicity v0.6.17, restarting a failed backup. Machine has 4GB RAM, of which 3GB is free. Duplicity runs fine, but eventually eats all memory and stops with malloc error.

Backups that didn't fail don't create these symptoms. Problem is recreatable and can provide any additional info.

 

Reading globbing filelist /root/duplicity-list-home

Local and Remote metadata are synchronized, no sync needed.

Warning, found the following local orphaned signature file:

duplicity-new-signatures.20120129T014540Z.to.20120130T070923Z.sigtar.part

Warning, found the following orphaned backup file:

[duplicity-inc.20120130T014542Z.to.20120130T070923Z.manifest.part]

Last inc backup left a partial set, restarting.

Last full backup date: Fri Jan 20 02:49:19 2012

RESTART: The first volume failed to upload before termination.

         Restart is impossible...starting backup from beginning.

Reading globbing filelist /root/duplicity-list-home

Local and Remote metadata are synchronized, no sync needed.

Warning, found the following local orphaned signature file:

duplicity-new-signatures.20120129T014540Z.to.20120130T070923Z.sigtar.part

Warning, found the following orphaned backup files:

[duplicity-inc.20120130T014542Z.to.20120130T070923Z.manifest.part]

[duplicity-inc.20120130T070923Z.to.20120130T150342Z.manifest.part]

Last full backup date: Fri Jan 20 02:49:19 2012

 

Traceback (most recent call last):

  File "/usr/bin/duplicity", line 1377, in ?

    with_tempdir(main)

  File "/usr/bin/duplicity", line 1370, in with_tempdir

    fn()

  File "/usr/bin/duplicity", line 1352, in main

    incremental_backup(sig_chain)

  File "/usr/bin/duplicity", line 571, in incremental_backup

    globals.backend)

  File "/usr/bin/duplicity", line 410, in write_multivol

    bytes_written += waiter()

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/dup_threading.py", line 201, in caller

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/asyncscheduler.py", line 183, in <lambda>

  File "/usr/bin/duplicity", line 398, in <lambda>

    async_waiters.append(io_scheduler.schedule_task(lambda tdp, dest_filename, vol_num: put(tdp, dest_filename, vol_num),

  File "/usr/bin/duplicity", line 296, in put

    backend.put(tdp, dest_filename)

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/backends/sshbackend.py", line 219, in put

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/backends/sshbackend.py", line 232, in put_sftp

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/backends/sshbackend.py", line 164, in run_sftp_command

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/pexpect.py", line 429, in __init__

  File "/var/tmp/duplicity-0.6.17-0.fdr.6-root-root/usr/lib64/python2.4/site-packages/duplicity/pexpect.py", line 529, in _spawn

ExceptionPexpect: Error! pty.fork() failed: [Errno 12] Cannot allocate memory

 

Strace at the time of the error:

 

munmap(0x2b056a330000, 4096)            = 0

lstat("/home/user10/domains/user10.si/public_html/administrator/components/com_installer/views/manage", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0

access("/home/user10/domains/user10.si/public_html/administrator/components/com_installer/views/manage", R_OK) = 0

mmap(NULL, 73125888, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b056a330000

munmap(0x2b056e8ed000, 73125888)        = 0

mmap(NULL, 73125888, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b056e8ed000

munmap(0x2b056a330000, 73125888)        = 0

mmap(NULL, 73125888, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b056a330000

munmap(0x2b056e8ed000, 73125888)        = 0

mmap(NULL, 73121792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b056e8ed000

munmap(0x2b056a330000, 73125888)        = 0

mmap(NULL, 73121792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b056a330000