05-06-2008
Here is some more details of the application. This application uses OpenSSH, to ftp files. When there are sftp failures, the sftp processes are becoming defunct. All the sftp are actually threads fork by the application. On investigation it is notice that some of the sftp processes which are defunct and the ssh process which is used by the application itself is going to exiting state. This doesnt happens immediately, after sftp failure, defunct processes are getting generated and also sometimes it gets cleared by itself, once it gets timed out. But after a long period say a 2 or 3 weeks, with many sftp failures in past, the processes goes to exiting state.
We are not able to kill -9 the exiting processes, it is not accepting any signals. Till now only way to clear them is to reboot the AIX box.
We are working on the remedy, but unable to understand how the processes are going to exiting state.
Has someone faced this issue where processes goes to exiting state, if yes how do we handle this situation ???
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LEARN ABOUT XFREE86
sftp-server
sftp-server(1M) System Administration Commands sftp-server(1M)
NAME
sftp-server - SFTP server subsystem
SYNOPSIS
/usr/lib/ssh/sftp-server
DESCRIPTION
sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.
sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.
To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:
Subsystem sftp /usr/lib/ssh/sftp-server
See sshd_config(4) for a description of the format and contents of that file.
There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
FILES
/usr/lib/sftp-server
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsshdu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)
To view license terms, attribution, and copyright for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
location.
AUTHOR
Markus Friedl
SunOS 5.10 30 Jul 2003 sftp-server(1M)