http://imagej.273.s1.nabble.com/Conflicting-ImageJ-sessions-in-different-X11-sessions-tp3691840p3691842.html
> Hello,
>
> I am encountering a very strange behavior. Here is the situation:
>
> ImageJ is called from within a shell script with the syntax:
> java -Xmx2000m -ijpath $pathToIJ/plugins -jar $pathToIJ/ij.jar -
> eval "some macro code" > /dev/null 2>&1
> The parent shell script runs on a Ubuntu Linux machine, latest and
> greatest. Each user has a *local* installation of the code (bash
> scripts + ij.jar and plugin class files). Each user also works on
> local images, on his account.
> User 1 starts IJ through the script and leaves it running.
> User 2 opens a new session (through ssh -X or locally using user
> switching, so that User 1 is still connected).
> User 2 tries to run the bash script = all windows appear on the
> desktop of User 1 !! There is also a message:
>
> Macro Error
>
> Duplicate call in line 1.
>
> run("Image Sequence...", "open=/... rest of my inline macro
>
>
> IJ seems to detect that it was already running and sends the
> windows to the running instance. Is that expected?
>
> This strikes me as very odd, and a potential security vulnerability.
>
> On this machine users:
> - each have their own group
> - write files as rw-rw-r-- (but since they each have their own
> group they can't write to each other's home directories)
> - all belong to the group "users", so that they can share data
> which is present on another drive (not the one accessed here)
>
> When I try to reproduce this manually such as:
> #run this as user 1
> wget
http://rsb.info.nih.gov/ij/download/jars/ij142q.jar> java -jar ij142q.jar -eval "run('AuPbSn 40 (56K)');"
> # leave IJ running
> #and this as user 2
> wget
http://rsb.info.nih.gov/ij/download/jars/ij142q.jar> java -jar ij142q.jar -eval "run('Bat Cochlea Volume (19K)');"
>
> IJ opens correctly for user 2. So this seems to be something
> specific to my code, but I really don't know where to look.
>
> I would very much appreciate any pointers to help me debug the
> issue. I cannot provide access to the machine (it is on an internal
> network only) but I can run anything that's needed to debug this.
>
> Thanks in advance. Sincerely,
>
> JiHO
> ---
>
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