null while processing system property java.home about capsule HOT 12 CLOSED

What's your OS? How did you install the JVM?

from capsule.

The method Capsule#parseJavaVersion() relies on this regex:

private static final Pattern PAT_JAVA_VERSION = Pattern.compile("(?<major>\\d+)\\.(?<minor>\\d+)\\.(?<patch>\\d+)(_(?<update>\\d+))?(-(?<pre>[^-]+))?(-(?<build>.+))?");

This regex fails when given a version of "1.8".

from capsule.

OS is "Ubuntu 14.04.1 LTS" & here are the relevant steps in the playbook to configure & install the JDK:

    - name: add oracle jdk repository
      apt_repository: repo=ppa:webupd8team/java

    - name: accept jdk license terms
      shell: echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | /usr/bin/debconf-set-selections

    - name: set java_home
      lineinfile: dest=/etc/environment state=present regexp='^JAVA_HOME' line='JAVA_HOME={{ java_home }}'

    - name: install ubuntu packages
      apt: pkg={{ item }} state=installed
      with_items:
      - oracle-java8-installer

from capsule.

I think the issue of parsing "1.8" is unrelated.

from capsule.

I was using the sourceCompatibility field in the Gradle script for the project to set Min-Java-Version: field in the manifest. Even if I set sourceCompatibility to be "1.8.0", Gradle rounded that down to "1.8".

from capsule.

See #58 (just fixed) for the "1.8" issue.

from capsule.

The parsing of the version is the deeper issue that ultimately caused the NPE.

A more insidious issue is that isMatchingJavaVersion() is swallowing the IllegalArgumentException thrown by parseJavaVersion(), thus masking the real problem and leading to an NPE downstream.

from capsule.

Alright, this has been fixed.
You can either wait for Capsule 1.0 to be released in a few short weeks, copy the fix to your clone of 0.10.0, or change the name of your JVM directory.

from capsule.

Well all I needed to do was change it to use "1.8.0" as the version number, the name of the JDK home directory is a red herring.

You should change the code to not swallow the IllegalArgumentException being caught here.

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Well, the Java home dir wasn't being recognized either, so those were two actual bugs.

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Your call, but I'm not so sure that's the case. I didn't change the directory in JAVA_HOME -- only changed Min-Java-Version to be "1.8.0" and it worked.

Maybe I'm just getting lost in the code but if it's not recognizing the Java home dir, how did it get the version string "1.8.0_31" (see above error message)?

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how did it get the version string "1.8.0_31"

Because that JVM happened to be the one used to launch the capsule itself, so it got the version number from the java.version property.

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