josm does not always find a valid JVM

[Paul Sladen]

Doing:

  apt-get install josm

under precise installs lots of java packages, but not a package with the actual 'java' command that '/usr/bin/josm' runs.

Ideally 'default-jre' or equivalent to be added to the dependency somehow.

[Colin Watson (cjwatson)]

I don't get it:

  Depends: openjdk-6-jre | sun-java6-jre | openjdk-7-jre

That's not "default-jre", admittedly, but all default-jre effectively does is depend on openjdk-6-jre. Do you have any of the above-listed packages installed? If so, which?

[Tobias Johansson (tj-mensa)]

I think I have the same bug. But I'm not sure. I just upgraded to 12.04 lts and after that I couldn't start josm from the unity launcher anymore.
So I did/found the following
1. Started command_promt typed "josm" and got "No valid JVM found to run JOSM."
2. Checked for packages "openjdk-6-jre | sun-java6-jre | openjdk-7-jre" in programcentral and found that "openjdk-6-jre" was installed
3. searched machine for josm.jar and found it "/usr/share/josm/josm.jar"
4. tried command "java -jar /usr/share/josm/josm.jar" and josm started no problem.
5. checked the script "/usr/bin/josm" that is used to start josm. the line that gives javacommands (I think not any godd with scripts) says "JAVA_CMDS="$JAVA_HOME/bin/java /usr/lib/jvm/java-6-openjdk/bin/java /usr/lib/jvm/java-6-sun/bin/java" " but the location of java command in my system seems to be "/usr/lib/jvm/java-6-openjdk-i386/jre/bin/java" thus the script returns that no JVM is found.
6. Changed this line to "JAVA_CMDS="$JAVA_HOME/bin/java /usr/lib/jvm/java-6-openjdk/bin/java /usr/lib/jvm/java-6-sun/bin/java /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java" "
7. Tried to launch from unity menu and it worked :)

So I thinck that the problem is the script not that the JVM isn't installed?

[Stefan Tauner (stefanct)]

after installing openjdk-7-jdk
and removing the following packages:
default-jdk openjdk-6-jre-headless default-jre-headless icedtea-6-jre-jamvm openjdk-6-jre openjdk-6-jre-lib icedtea-6-jre-cacao openjdk-6-jdk default-jre openjdk-6-demo

the josm start script failed to load it as described above although
java -jar /usr/share/josm/josm.jar
works fine...

[Stefan Tauner (stefanct)]

i have not looked at how debian does this (we probably better should do that), but FWIW this is my solution... this most probably is not what the original authors wanted though, because this will try to launch josm even on headless-only solutions i think. but it has the advantage, that it uses whatever jvm is available, even if it is only reachable by JAVA_HOME and/or JDK_HOME...

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "josm-JAVA_HOME.patch" of this bug report has been identified as being a patch. The ubuntu-reviewers team has been subscribed to the bug report so that they can review the patch. In the event that this is in fact not a patch you can resolve this situation by removing the tag 'patch' from the bug report and editing the attachment so that it is not flagged as a patch. Additionally, if you are member of the ubuntu-reviewers team please also unsubscribe the team from this bug report.

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[Alexandre Magno (alexandre-mbm)]

See the bug #1186377.

[Bas Couwenberg (sebastic)]

The /usr/bin/josm used by the upstream packages for their PPA [0] and the one used for the Debian package included in Debian and derivatives have been synchronized with the update to JOSM 8989. [1]

Both OpenJDK & the Oracle JDK packages for Ubuntu are now supported in /usr/bin/josm, if you need josm to use a different JDK it has been possible to specific it with the JAVACMD environment variable for quite some time, e.g.:

 JAVACMD=/usr/lib/jvm/jdk-8-oracle-x64/bin/java josm

If the /usr/bin/java configured with the alternatives system is found in the list of possible java commands that one will be used, if it's not found the first java command that exists and is executable will be used. The list of possible java commands is not checked when JAVACMD was already defined in the environment.

[0] https://josm.openstreetmap.de/wiki/Download#Ubuntu
[1] https://josm.openstreetmap.de/ticket/12033