This is a JNA problem. I don't have access to the ARM platform which
you have. If you want to help debug this, do the following:

(1) Make sure that you have apache-ant installed
(2) git clone https://github.com/twall/jna
(3) Build jna and run the tests:
cd jna
ant

(4) Report any problems to: https://github.com/twall/jna#community-and-support

Michka,

Can you build JNA and run the tests on ARM
using the steps which I described, and provide
the results? Is your ARM platform the same as the ARMv5Linux platform that Synology uses?

Thanks for the help.

Yes DS 212 is a Marvell Kirkwood mv6282 1.6Ghz ARM (Marvell ARMADA 300) and fully ARMv5TE-compliant.
http://forum.synology.com/wiki/index.php/What_kind_of_CPU_does_my_NAS_have
http://www.marvell.com/embedded-processors/kirkwood/assets/88f6282-3_pb.pdf

I have installed apache-ant and cloned jna as you suggested.

Trying to build it got me this error:

Unable to locate tools.jar. Expected to find it in /volume1/@appstore/java7/lib/tools.jar
Buildfile: /volume1/public/jna/build.xml

-enable-native:

-dynamic-properties:

BUILD FAILED
/volume1/public/jna/build.xml:258: Can't find JNI headers (java.home=/volume1/@appstore/java7/jre)

It seems I need the proper JDK for that.
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html

But I don't know how to install this on a synology. The previous SE was supported through a community package, which I got from here: http://pcloadletter.co.uk/2011/08/23/java-package-for-synology/

You need a full JDK to compile things.

If you download the http://www.oracle.com/technetwork/java/javase/downloads/jdk8-arm-downloads-2187472.html
and extract the tar.gz file, set the PATH to point to the right java
binary, can you get it to work?

Otherwise I recommend asking a Synology developer to help you.

This is actually a great idea. I ended up removing the SE package to make sure I am pointing at the right Java JDK.

export JAVA_HOME=/volume1/public/jdk1.8.0_06
export PATH=${PATH}:${JAVA_HOME}/bin
chmod -R 777 /volume1/public/jdk1.8.0_06

when I type java it says:
-ash: java: not found

Funny part is:
DiskStation> ls -l /volume1/public/jdk1.8.0_06/bin/java
-rwxrwxrwx 1 admin users 5916 Nov 2 22:46 /volume1/public/jdk1.8.0_06/bin/java
DiskStation> /volume1/public/jdk1.8.0_06/bin/java
-ash: /volume1/public/jdk1.8.0_06/bin/java: not found

So strange...

I wonder if I am overlooking something. I will try to get in touch with support of Synology. Thanks for headsup though.

Looks like the default shell on Synology is ash.
You might want to try something like:

JAVA_HOME=/volume1/public/jdk1.8.0_06
export JAVA_HOME
PATH=${JAVA_HOME}/bin:${PATH}
export PATH
echo $PATH
java -version

Yes, you are right it is ash.

BusyBox v1.16.1 (2014-10-20 22:22:41 CST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

DiskStation> JAVA_HOME=/volume1/public/jdk1.8.0_06
DiskStation> export JAVA_HOME
DiskStation> PATH=${JAVA_HOME}/bin:${PATH}
DiskStation> export PATH
DiskStation> echo $PATH
/volume1/public/jdk1.8.0_06/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/syno/sbin:/usr/syno/bin:/usr/local/sbin:/usr/local/bin
DiskStation> java -version
-ash: java: not found
DiskStation>

But it still doesn't want to work. I raised a support request to Synology. Hopefully they come back to me.

Checking this with upstream

houmie can you check to ensure that this still happens with recent versions? Pretty old at this point.

Jenkins no longer support Java 8