Hi Glen, Could you please check that your vncserver executable doesn't have the setuid bit set? (Try: ls -l `which vncserver`)
If the vncserver is not a setuid binary, it could be that the vncserver is on a list of "protected" apps in AppArmor. The kernel doesn't allow LD_PRELOAD on such applications. We can suggest some workarounds depending on what you have. Thanks, Rohan ----- Original Message ----- From: "Glen MacLachlan" <macl...@gwu.edu> To: "dmtcp-forum" <dmtcp-forum@lists.sourceforge.net> Sent: Monday, April 13, 2015 5:25:30 PM Subject: [Dmtcp-forum] DMTCP+VNC Hi, First, dmtcp is great and I'm very happy with it, generally. I've been trying to get the recipe for using dmtcp with vnc (found here: http://dmtcp.sourceforge.net/FAQ.html ) working and I've run into some unanticipated trouble that I'd like to bounce off somebody more knowledgeable than I. I am using 2.4.0-rc2 and tightvnc for this discussion. Following the instructions, in a terminal I do the following: [maclach@localhost ~]$ dmtcp_launch vncserver :1 dmtcp_coordinator starting... Host: localhost.localdomain (127.0.0.1) Port: 7779 Checkpoint Interval: disabled (checkpoint manually instead) Exit on last client: 1 Backgrounding... ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp_alloc.so' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp_dl.so' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp_ipc.so' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp_timer.so' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp.so' from LD_PRELOAD cannot be preloaded: ignored. ERROR: ld.so: object '/disk01/apps/dmtcp/lib/dmtcp/libdmtcp_pid.so' from LD_PRELOAD cannot be preloaded: ignored. The problem preloading only happens when I try to start the vncserver. I can use dmtcp just fine with all other applications, including the examples provided in the test directory. I've tried preloading the libraries above with the --with-plugin option but this does change anything (apart from additional messages about not being able to preload). When I continue on despite the preload issues I try running the vnc client which does not work: [maclach@localhost ~]$ vncviewer :1 TigerVNC Viewer for X version 1.1.0 - built Oct 30 2014 12:44:50 Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt) See http://www.tigervnc.org for information on TigerVNC. Mon Apr 13 17:06:32 2015 main: unable connect to socket: Connection refused (111) Without dmtcp there is no problem running tightvnc. Any ideas about where I'm going wrong or how to work around this problem would be _greatly_ appreciated. Thanks, Glen. ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Dmtcp-forum mailing list Dmtcp-forum@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dmtcp-forum ------------------------------------------------------------------------------ BPM Camp - Free Virtual Workshop May 6th at 10am PDT/1PM EDT Develop your own process in accordance with the BPMN 2 standard Learn Process modeling best practices with Bonita BPM through live exercises http://www.bonitasoft.com/be-part-of-it/events/bpm-camp-virtual- event?utm_ source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF _______________________________________________ Dmtcp-forum mailing list Dmtcp-forum@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dmtcp-forum
