Why still getting JNA error on Cassandra startup, even the jna.jar and platform.jar are there in the lib dir?

问题

I have downloaded and copied Jna.jar and Platform.jar to /usr/cassandra/apache-cassandra-1.0.7/lib folder, but still see the following error on Cassandra startup, am I missing anything?

"On cassandra JNA not found. Native methods will be disabled."

And the following are where I get the Jna.jar and Platform.jar

https://github.com/downloads/twall/jna/jna.jar https://github.com/downloads/twall/jna/platform.jar

回答1:

Based on the suggested in comments post.

Ubunto 12.10
Cassandra 1.1.6

I fixed this by

sudo apt-get install libjna-java
sudo ln -s /usr/share/java/jna.jar /usr/share/cassandra/lib

来源：https://stackoverflow.com/questions/9561189/why-still-getting-jna-error-on-cassandra-startup-even-the-jna-jar-and-platform