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m27315
Apprentice
Joined: 10 Dec 2004
Posts: 253
Location: 2 workstations down
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 Posted: Thu Jun 05, 2008 2:15 pm Post subject: [TIP] Clear NX (No Machine) session cache during boot-up |
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If you use No Machine (NX, or FreeNX), you may have run into a problem where the box is rebooted with active sessions still open. The dead session files can block the same users from re-establishing a new session, once the box boots back up. You can SSH into the box and remove the sessions as root each time a user complains, or you can ensure that it is done automagically at startup, every time, like so:
| Code: | | echo '/bin/rm -rf /usr/NX/var/db/*/session*' >> /etc/conf.d/local.start |
Since discovering the local.start and local.stop files, I have been piling all kind of useful commands that ensure my box comes up (or goes down) in a known good, clean state.
BTW, the NX error message, which indicates you need to wipe out the session files, looks like this:
| Code: | NX> 203 NXSSH running with pid: 3144
NX> 285 Enabling check on switch command
NX> 285 Enabling skip of SSH config files
NX> 285 Setting the preferred NX options
NX> 200 Connected to address: MY_IP_ADDRESS on port: 22
NX> 202 Authenticating user: nx
NX> 208 Using auth method: publickey
HELLO NXSERVER - Version 3.2.0-7 - LFE
NX> 105 Hello NXCLIENT - Version 3.2.0
NX> 134 Accepted protocol: 3.2.0
NX> 105 Set shell_mode: shell
NX> 105 Set auth_mode: password
NX> 105 Login
NX> 101 User: MY_USERID
NX> 102 Password: ********
NX> 103 Welcome to: MY_MACHINE user: MY_USERID
NX> 105 Listsession --user="MY_USERID" --status="suspended\054running" --geometry="3200x1200x32+render+fullscreen" --type="unix-kde"
NX> 127 Available sessions:
Display Type Session ID Options Depth Screen Status Session Name
------- ---------------- -------------------------------- -------- ----- -------------- ----------- ------------------------------
1007 unix-kde AED37B9C496FCEFDE3CB6047DED2632F FRD--PSA 32 3200x1200 Running MY_MACHINE
NX> 148 Server capacity: not reached for user: MY_USERID
NX> 105 Restoresession --link="adsl" --backingstore="1" --encryption="1" --cache="128M" --images="512M" --shmem="1" --shpix="1" --strict="0" --composite="1" --media="1" --mediahelper="esd" --session="MY_MACHINE" --type="unix-kde" --geometry="3200x1140" --fullscreen="1" --client="winnt" --keyboard="pc102\057en_US" --id="AED37B9C496FCEFDE3CB6047DED2632F" --resize="1"
NX> 900 Suspending session with id: AED37B9C496FCEFDE3CB6047DED2632F for user: MY_USERID
NX> 595 ERROR: A fatal error occurred in NX Server.
NX> 595 ERROR: The exception id is: 2D006DE2. To get detailed information about
NX> 595 ERROR: the error search for the string 2D006DE2 in the system log
NX> 595 ERROR: file (usually '/var/log/messages').
NX> 500 ERROR: Last operation failed.
NX> 280 Exiting on signal: 15 |
HTH |
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jlpoole
Guru
Joined: 01 Nov 2005
Posts: 490
Location: Salem, OR
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| Posted: Mon Oct 19, 2009 2:50 pm Post subject: |
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I installed neatx, Google's implementation of the NX server that doesn't have the capacity limitation that the free version from No Machines has.
| Code: | localhost sessions # eix neatx
[I] net-misc/neatx
Available versions: (~)0.3.1_p43-r1
Installed versions: 0.3.1_p43-r1(04:29:45 10/07/09)
Homepage: http://code.google.com/p/neatx/
Description: Google implementation of NX server
localhost sessions #
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And I ran into the problem of a prior crashed session preventing me from logging back in. I followed the directions above; however, the same cached session continued to block me:
Although I had previous sessions from nxser, removing them did not remove the session that was cached. Suspecting that NeatX was the culprit I determined that NeatX was caching sessions and found them under /var/lib/neatx/sessions, so I did the same kind of housecleaning on that directory as recommended in this thread:
| Code: | localhost sessions # pwd
/var/lib/neatx/sessions
localhost sessions # ls
1778B6C57810744C38682A84F6A66138 6DC797A63E86FCC1B39945D87BD9F01A
40C4F3C7EAAE552404F229EE0007D49C
localhost sessions # rm -R *
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After removing the neatx sessions, I was able to successfully login from Windows. |
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