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Full Discussion: How to avoid "cannot execute" issue with a runnable jar file?
Operating Systems Solaris How to avoid "cannot execute" issue with a runnable jar file? Post 302575368 by kchinnam on Monday 21st of November 2011 11:49:40 AM
Old 11-21-2011
serverA, serverB both are running Solaris8, JDK1.4.2_04.

Yes general understanding is you can't execute jar files directly. But that is not true from JDK1.2 on words, apparently both windows and Unix do recognize .jar associated with java and execute the class with main method specified in manifest file.
This article explins how that happens..> http://www.javaworld.com/javaworld/j...27.html?page=1

I also gave proof in my post that "myjar_r.jar" jar file is getting executed on serverB, but not on serverA.
Since test jar file is available on the net, anyone can test it.

I did check other things like how Unix file associations work using -->
/etc/magic,
/usr/dt/appconfig/types/C/datatypes.dt. I did check if this has something do with PATH, CLASSPATH settings or tty setting etc.. Bu all these settings look same on both servers.
That is why this problems looks very interesting and challenging.
Last edited by kchinnam; 11-21-2011 at 12:58 PM.. Reason: added more info
 

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LEARN ABOUT DEBIAN

mh_installjar

MAVEN(1)							   User Commands							  MAVEN(1)

NAME

       Maven - Installs a jar into /usr/share/maven-repo.

SYNOPSIS

       mh_installjar [option]... [pom] [jar] [link]...

DESCRIPTION

       Installs the jar file in /usr/share/maven-repo, at the correct location for Maven. The jar is copied into the build directory.  It can also
       create additional links to the jar, usually located in /usr/share/java.

       Where

	      [pom] is the location of the POM associated with the jar to install.

	      GroupId, artifactId and version will be extracted from this file.

	      [jar] is the path to the jar to install, usually located in the build

	      folder.

	      [link] is an additional link to the jar to install, usually there should

	      be a link to usr/share/java/$jar.jar and usr/share/java/$jar-$version.jar to comply with the Java packaging  guidelines.	Note  that
	      there is no need to specify those particular links if the --java-lib option is used.

OPTIONS

       -h --help: show this text

       -V --version: show the version

       -p<package> --package=<package>: name of the Debian package which

	      will contain this jar file

       -e<version>, --set-version=<version>: set the version for the jar,

	      do not use the version declared in the POM file.

       -r<rules> --rules=<rules>: path to the file containing the

	      rules to apply when cleaning the POM.  Optional, the default location is debian/maven.rules Maven rules are used here to extract the
	      groupId, artifactId and version from the POM file.

       -l --java-lib: Optional, if given it will install the jar into

	      /usr/share/java to comply with the Debian Java specification.  The jar will be installed as /usr/share/java/$name-$version.jar and a
	      versionless link /usr/share/java/$name.jar will point to it, as well as the links installed in /usr/share/maven-repo

       -n<name> --usj-name=<name>: Optional, the name to use when installing the

	      library in /usr/share/java when --java-lib is used.  Defaults to the artifact id found in the POM.

       -j<version> --usj-version=<version>: Optional, the version to use when

	      installing the library in /usr/share/java when --java-lib is used.  Defaults to the version found in the POM.

       -s --no-usj-versionless: Optional, don't install the versionless link

	      in /usr/share/java.  This flag is used only when the -l or --java-lib option is given.

       -d<path> --dest-jar=<path>: Optional, the destination for the real jar.

	      The  other  places  where  the  jar  appears,  in the repository or in the list of links, will be symlinks to this jar.  Defaults to
	      /usr/share/java/$name-$version.jar if --java-lib is used, otherwise the jar is installed in the versioned path in the Maven  reposi-
	      tory.

       -c<classifier> --classifier=<classifier>: Optional, the classifier for

	      the jar. Empty by default.

       -v --verbose: show more information while running

       -n --no-act: don't actually do anything, just print the results

       --skip-clean-pom: don't clean the pom, assume that a previous action ran

	      mh_cleanpom with the correct options. mh_cleanpom is run only to extract the groupId, artifactId and version of the jar

       See also: mh_installpom(1), mh_installsite(1)

Maven Repo Helper version 1.7.1 				   January 2012 							  MAVEN(1)
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