Hi Michael,
Same as previous one, if you could suggest a way for me to reproduce the
bug locally, it would be much easier to come up with a fix :-).
Best,
Kapil
On Wed, Jul 8, 2015 at 8:40 PM, Michael Gutteridge <
michael.gutteri...@gmail.com> wrote:
> Hi
>
> I'm attempting to checkpoint a Java application. I'm using "dmtcp_launch
> --ckpt-open-files java -jar ..." to start the application and setting the
> checkpoint directory to a networked file system.
>
> Everything seems to work as expected, but restarts are failing:
>
> $ /scratch/dmtcp_restart_script.sh
> dmtcp_coordinator starting...
> Host: ****** (***.***.***.***)
> Port: 7779
> Checkpoint Interval: disabled (checkpoint manually instead)
> Exit on last client: 1
> Backgrounding...
> [22895] mtcp_restart.c:1248 read_shared_memory_area_from_file:
> mapping current version of /app/BEAST/1.8.2/lib/beast.jar into memory;
> _not_ file as it existed at time of checkpoint.
> (Or this may be a file shared by multiple processes.)
> Change mtcp_restart.c:1248 and re-compile, if you want different
> behavior.
> [40000] ERROR at fileconnection.cpp:943 in areFilesEqual;
> REASON='JASSERT(Util::readAll(fd, buf2, readBytes) == readBytes) failed'
> java (40000): Terminating...
>
> It seems very similar to an issue reported here:
>
> http://sourceforge.net/p/dmtcp/mailman/message/32939254/
>
> I have tried the patch attached in final update to that. Restart still
> fails, but the message changes:
>
> $ dmtcp_restart_script.sh
> dmtcp_coordinator starting...
> Host: ****** (***.***.***.***)
> Port: 7779
> Checkpoint Interval: disabled (checkpoint manually instead)
> Exit on last client: 1
> Backgrounding...
> [23895] mtcp_restart.c:1248 read_shared_memory_area_from_file:
> mapping current version of /app/BEAST/1.8.2/lib/beast.jar into memory;
> _not_ file as it existed at time of checkpoint.
> (Or this may be a file shared by multiple processes.)
> Change mtcp_restart.c:1248 and re-compile, if you want different
> behavior.
> [40000] ERROR at fileconnection.cpp:985 in writeFileFromFd;
> REASON='JASSERT(_real_lseek(fd, 0, SEEK_SET) == 0) failed'
> fd = -1
> (strerror((*__errno_location ()))) = Bad file descriptor
> java (40000): Terminating...
>
>
> Without checkpointing files the restart works fine. Regrettably, I need
> to have those files checkpointed. Any advice would be appreciated.
>
> Thanks
>
> Michael
>
>
>
>
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