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From: | Patrik Dufresne |
Subject: | Re: [rdiff-backup-users] rdiff-backup dies with ENOMEM due to requesting enormous amounts of memory |
Date: | Fri, 10 Jun 2016 07:34:46 -0400 |
I'm trying to get rdiff-backup working for the first time across SSH (with sudo) on two CentOS 7 hosts. I'm getting the following crash:
$ sudo rdiff-backup --restrict-read-only / -v5 --remote-schema 'ssh -l rdiff -i /home/rdiff/.ssh/id_rsa -t -t %s "sudo /usr/bin/rdiff-backup --server"' bacula-p1n01::/ /dumps/bacula-p1n01/
Thu Jun 9 15:34:42 2016 Using rdiff-backup version 1.2.8
Thu Jun 9 15:34:42 2016 Executing ssh -l rdiff -i /home/rdiff/.ssh/id_rsa -t -t bacula-p1n01 "sudo /usr/bin/rdiff-backup --server"
Thu Jun 9 15:34:42 2016 Client sending (0): ConnectionRequest: Globals.get with 1 arguments
Thu Jun 9 15:34:42 2016 Client sending (0): 'version'
Connection to bacula-p1n01 closed.
Thu Jun 9 15:34:43 2016 Exception '' raised of class '<type 'exceptions.MemoryError'>':
File "/usr/lib64/python2.7/site-packages/rdiff_backup/Main.py", line 304, in error_check_Main
try: Main(arglist)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/Main.py", line 321, in Main
rps = map(SetConnections.cmdpair2rp, cmdpairs)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 76, in cmdpair2rp
if cmd: conn = init_connection(cmd)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 150, in init_connection
check_connection_version(conn, remote_cmd)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 158, in check_connection_version
try: remote_version = conn.Globals.get('version')
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 450, in __call__
return apply(self.connection.reval, (self.name,) + args)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 368, in reval
result = self.get_response(req_num)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 315, in get_response
try: req_num, object = self._get()
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 240, in _get
data = ""> File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 210, in _read
try: return self.inpipe.read(length)
Traceback (most recent call last):
File "/usr/bin/rdiff-backup", line 30, in <module>
rdiff_backup.Main.error_check_Main(sys.argv[1:])
File "/usr/lib64/python2.7/site-packages/rdiff_backup/Main.py", line 304, in error_check_Main
try: Main(arglist)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/Main.py", line 321, in Main
rps = map(SetConnections.cmdpair2rp, cmdpairs)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 76, in cmdpair2rp
if cmd: conn = init_connection(cmd)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 150, in init_connection
check_connection_version(conn, remote_cmd)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/SetConnections.py", line 158, in check_connection_version
try: remote_version = conn.Globals.get('version')
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 450, in __call__
return apply(self.connection.reval, (self.name,) + args)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 368, in reval
result = self.get_response(req_num)
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 315, in get_response
try: req_num, object = self._get()
File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 240, in _get
data = ""> File "/usr/lib64/python2.7/site-packages/rdiff_backup/connection.py", line 210, in _read
try: return self.inpipe.read(length)
MemoryError
On that host when I strace the process I see:
[pid 11602] mmap(NULL, 18118029061677056, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 <unfinished ...>
...
[pid 11602] <... mmap resumed> ) = -1 ENOMEM (Cannot allocate memory)
... am I mistaken or is rdiff-backup requesting a ridiculous amount of memory? Why would it do that?
--
Jeff White
HPC Systems Engineer
Information Technology Services - WSU
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