In Precise, weka (java) windows always open in a different workspace

[Neal McBurnett]

Weka is a machine learning package in Ubuntu, written in java.

As described by @ubershmekel at:
 12.04 - Weka windows always open in a different workspaces - Ask Ubuntu
 http://askubuntu.com/questions/161575/weka-windows-always-open-in-a-different-workspaces

"On 12.04 every time I open weka it starts in the second workspace. If I move it to workspace #1, all the new windows it opens are in workspace #2. If I try and work in the 2nd workspace, new windows are opened in the 1st. There's no way for me to avoid being hassled by weka."

I have the same problem, so this should be easy to confirm, and I'm guessing it is unity-related.

To reproduce:

$ weka -m 512m
---Registering Weka Editors---
Trying to add database driver (JDBC): RmiJdbc.RJDriver - Error, not in CLASSPATH?
Trying to add database driver (JDBC): jdbc.idbDriver - Error, not in CLASSPATH?
Trying to add database driver (JDBC): org.gjt.mm.mysql.Driver - Error, not in CLASSPATH?
Trying to add database driver (JDBC): com.mckoi.JDBCDriver - Error, not in CLASSPATH?
Trying to add database driver (JDBC): org.hsqldb.jdbcDriver - Error, not in CLASSPATH?

I think we can safely ignore these error messages since database access is not necessary.

I expect to see a GUI window pop up. Sometimes I see one briefly flicker in and out of view, but mostly it just seems to hang. But if I then use the Unity Workplace Switcher to look around, I'll see that the window opened up elsewhere, e.g. workspace 2. Then if I go there and open a further window up e.g. by clicking on "Explorer", nothing seems to happen, but in fact it opens that up, but yet again in a different workspace, e.g. back in workspace 1. Very frustrating.

I'm using icedtea 6 on a 64-bit machine.

[Bilal Akhtar (bilalakhtar)]

Surely it must have something to do with weka. Unity spawns windows in the current workspace, unless the window explicitly states otherwise.

[Daniel van Vugt (vanvugt)]

I think this is either going to be solved with bug 754508, or bug 874146. Neither is a perfect fit, but between them this bug is covered.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andrea Azzarone (azzar1)]

Can you still reproduce this bug?

[Launchpad Janitor (janitor)]

[Expired for Unity because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for weka (Ubuntu) because there has been no activity for 60 days.]