[rdiff-backup-users] Socket error: AF_UNIX path too long

[devzero]

hello !

i have come across a weird error.

error_log is empty everyday, but i found that on april 29, there is some weird 
error inside:

$ ls -la error_log.2006-0*
-rw-------  1 root root   0 Apr 13 10:38 
error_log.2006-04-13T10:18:44+02:00.data
-rw-------  1 root root   0 Apr 13 21:02 
error_log.2006-04-13T20:59:19+02:00.data
-rw-------  1 root root   0 Apr 15 01:03 
error_log.2006-04-15T00:59:28+02:00.data
-rw-------  1 root root   0 Apr 17 01:24 
error_log.2006-04-17T01:21:14+02:00.data
-rw-------  1 root root   0 Apr 18 00:20 
error_log.2006-04-18T00:17:23+02:00.data
-rw-------  1 root root   0 Apr 18 23:01 
error_log.2006-04-18T22:56:57+02:00.data
-rw-------  1 root root   0 Apr 19 01:19 
error_log.2006-04-19T01:16:35+02:00.data
-rw-------  1 root root   0 Apr 20 01:20 
error_log.2006-04-20T01:16:03+02:00.data
-rw-------  1 root root   0 Apr 21 01:23 
error_log.2006-04-21T01:20:02+02:00.data
-rw-------  1 root root   0 Apr 22 00:56 
error_log.2006-04-22T00:54:22+02:00.data
-rw-------  1 root root   0 Apr 24 00:06 
error_log.2006-04-24T00:02:17+02:00.data
-rw-------  1 root root   0 Apr 26 10:02 
error_log.2006-04-26T09:57:53+02:00.data
-rw-------  1 root root   0 Apr 28 02:31 
error_log.2006-04-28T02:28:07+02:00.data
-rw-------  1 root root 211 Apr 29 02:22 
error_log.2006-04-29T02:18:43+02:00.data.gz
-rw-------  1 root root   0 May  1 01:50 
error_log.2006-05-01T01:45:26+02:00.data
-rw-------  1 root root   0 May  4 00:57 
error_log.2006-05-04T00:51:52+02:00.data
-rw-------  1 root root   0 May  4 23:32 
error_log.2006-05-04T23:26:08+02:00.data
-rw-------  1 root root   0 May  5 00:45 
error_log.2006-05-05T00:38:57+02:00.data
-rw-------  1 root root   0 May  8 00:56 
error_log.2006-05-08T00:51:42+02:00.data
-rw-------  1 root root   0 May  9 21:04 
error_log.2006-05-09T20:58:56+02:00.data
-rw-------  1 root root   0 May 11 01:06 
error_log.2006-05-11T01:00:28+02:00.data
-rw-------  1 root root   0 May 13 01:50 
error_log.2006-05-13T01:43:36+02:00.data

$ zcat error_log.2006-04-29T02\:18\:43+02\:00.data.gz
SpecialFileError var/lib/mysql/mysql.sock AF_UNIX path too long
SpecialFileError var/run/authdaemon.courier-imap/socket Socket error: AF_UNIX 
path too long

does anybody have a clue, what this means and why this only happened on april 
29 ?
mysql and courier is running permanently on the remote-machine, so those 
"socket files" should be the same everyday.
btw: i`m first rsyncing the contents to a local directory and then make an 
rdiff-backup from that, because i cannot install rdiff-backup on the target 
machine.

regards
roland k. 
systems engineer

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