12-08-2011
Rsync through java program - issues with remote connection failure
Hi Everybody,
I am running rsync through my java application.
The Java application will sync the files with remote machine. During our connection failure testing we noticed an issue running rsync through java program. The java application which is running at source side is not receiving any error message if there are any connection issues during the sync process.
Brief details about the test scenario:
1. We run the Java Program
2. The java program starts the rsync command and sync the large number of files from source to remote destination
3. During the sync process we run the ps -ef | grep rsync to check whether the processes are running or not at both(source and dest) side. Both side rsync processes are running.
4. We identify the rsync process id at target machine and kill the process with Kill -9 <pid>
5. The java code didn't receive any error message and didn't exit. It just hanged.
6. And also noticed that the rsync process is still running at source side and rsync process is also not printing any log message in the log file.
Note : If we run the rsync command directly (not through java program) , then everything is working fine. When we stop the rsync process at target the source process will be stopped.
Through perl its working fine. Not sure what the problem with java...!!!
I don't have any clues to debug this issue.
Please share your thoughts and pointer to debug.
execuse me if i confused you .
Thanks !!
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LEARN ABOUT LINUX
rsync_selinux
rsync_selinux(8) rsync Selinux Policy documentation rsync_selinux(8)
NAME
rsync_selinux - Security Enhanced Linux Policy for the rsync daemon
DESCRIPTION
Security-Enhanced Linux secures the rsync server via flexible mandatory access control.
FILE_CONTEXTS
SELinux requires files to have an extended attribute to define the file type. Policy governs the access daemons have to these files. If
you want to share files using the rsync daemon, you must label the files and directories public_content_t. So if you created a special
directory /var/rsync, you would need to label the directory with the chcon tool.
chcon -t public_content_t /var/rsync
To make this change permanent (survive a relabel), use the semanage command to add the change to file context configuration:
semanage fcontext -a -t public_content_t "/var/rsync(/.*)?"
This command adds the following entry to /etc/selinux/POLICYTYPE/contexts/files/file_contexts.local:
/var/rsync(/.*)? system_u:object_r:publix_content_t:s0
Run the restorecon command to apply the changes:
restorecon -R -v /var/rsync/
SHARING FILES
If you want to share files with multiple domains (Apache, FTP, rsync, Samba), you can set a file context of public_content_t and pub-
lic_content_rw_t. These context allow any of the above domains to read the content. If you want a particular domain to write to the pub-
lic_content_rw_t domain, you must set the appropriate boolean. allow_DOMAIN_anon_write. So for rsync you would execute:
setsebool -P allow_rsync_anon_write=1
BOOLEANS
system-config-selinux is a GUI tool available to customize SELinux policy settings.
AUTHOR
This manual page was written by Dan Walsh <dwalsh@redhat.com>.
SEE ALSO
selinux(8), rsync(1), chcon(1), setsebool(8), semanage(8)
dwalsh@redhat.com 17 Jan 2005 rsync_selinux(8)