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From "Bob Kerns (JIRA)" <>
Subject [jira] Created: (DAEMON-102) JVM + System PATH environment = Version Skew
Date Sat, 01 Sep 2007 20:29:18 GMT
JVM + System PATH environment = Version Skew

                 Key: DAEMON-102
             Project: Commons Daemon
          Issue Type: Bug
    Affects Versions: 1.0.1, 1.0, 1.0 Alpha
         Environment: Windows, All
            Reporter: Bob Kerns

When Tomcat 6 is installed, it prompts you for the location of the JVM you wish to use.

However, it neither computes the necessary value for the PATH environment variable to make
that JVM work, nor prompts you for it.

Instead, it depends on the system's PATH environment variable happening to have on it the
JRE's bin directory.

If, however, it does not have a JRE bin directory, or it points to a DIFFERENT JRE -- we have
a problem.

Basically, this is a formula for very mysterious failure. When the System path changed, due
to a change in JVM for other purposes, Tomcat 6's service launcher mysteriously became unable
to load the JVM.

My workaround was to add the Environment configuration parameter with PATH=<a valid path>.
(I did this via editing the registry; presumably I could have done it from the command line.
But the GUI does NOT provide a way to set this!)

It seems wrong to always embed the ENTIRE pah. Perhaps when launching a JVM it should silently
do a SetDllDirectory to add the parent directory. This would ensure that it would find the
CORRECT dlls. The current behavior does NOT find the correct DLLs unless (and while) the system
PATH variable points to them.

This makes the behavior consonant with what running the JVM from java.exe does, because the
.exe's directory (same as the parent of the jvm.dll's directory) is automatically included
in the DLL search path, earlier than the PATH variable.

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