Hi all,
For the purposes of getting a demonstration running, we have decided to attach
both the IRC server and IRC client to the dmtcp_coordinator. We are able to
successfully checkpoint all programs, with the client and server running on
different virtual machines. We can restart everything when starting the IRC
server first, but if we kill the IRC server while the clients are running, the
server gives us the following error when attempting to restart.
Message: Coordinator in a funny state. Peers exist, not restarting,
but not in a running state. Checkpointing?
Or maybe restarting and running with peers existing?
It then advised to use the utils/dmtcp_backtrace.py utility to dump the error
output, which I have attached below.
Examing stack for call frames from:
/usr/local/bin/dmtcp_restart
FORMAT: FNC: ..., followed by file:line_number (most recent first).
** FNC: writeBacktrace
dmtcp-1.2.4/dmtcp/src/../jalib/jassert.cpp:193
** FNC: jassert_internal::JAssert::jbacktrace()
dmtcp-1.2.4/dmtcp/src/../jalib/jassert.cpp:228
** FNC: ~JAssert
dmtcp-1.2.4/dmtcp/src/../jalib/jassert.cpp:116
** FNC: dmtcp::DmtcpCoordinatorAPI::recvCoordinatorHandshake(int*)
dmtcp-1.2.4/dmtcp/src/dmtcpcoordinatorapi.cpp:224
** FNC: restoreSockets
dmtcp-1.2.4/dmtcp/src/dmtcp_restart.cpp:704
** FNC: main
dmtcp-1.2.4/dmtcp/src/dmtcp_restart.cpp:925
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x469113]
** FNC: _start
??:0
Any ideas? Is there a reason that we wouldn't be able to restart the server
while the clients are still running?
Thanks,
Nick
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