I went to github to try to download jna again. I downloaded version 3.5.1 [root@cassandra-node01 cassandrahome]# ls -l lib/jna-3.5.1.jar -rw-r--r-- 1 root root 692603 Jan 28 21:57 lib/jna-3.5.1.jar
I noticed in the datastax docs that java 7 was not recommended so I downgraded to java 6 [root@cassandra-node01 cassandrahome]# java -version java version "1.6.0_34" Java(TM) SE Runtime Environment (build 1.6.0_34-b04) Java HotSpot(TM) 64-Bit Server VM (build 20.9-b04, mixed mode) And now if I try to start cassandra with that library it fails with this message: [root@cassandra-node01 cassandrahome]# ./bin/cassandra -f xss = -ea -javaagent:/etc/alternatives/cassandrahome/lib/jamm-0.2.5.jar -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms295M -Xmx295M -Xmn73M -XX:+HeapDumpOnOutOfMemoryError -Xss180k INFO 22:00:14,318 Logging initialized INFO 22:00:14,333 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_34 INFO 22:00:14,334 Heap size: 301727744/302776320 INFO 22:00:14,334 Classpath: /etc/alternatives/cassandrahome/conf:/etc/alternatives/cassandrahome/build/classes/main:/etc/alternatives/cassandrahome/build/classes/thrift:/etc/alternatives/cassandrahome/lib/antlr-3.2.jar:/etc/alternatives/cassandrahome/lib/apache-cassandra-1.2.1.jar:/etc/alternatives/cassandrahome/lib/apache-cassandra-clientutil-1.2.1.jar:/etc/alternatives/cassandrahome/lib/apache-cassandra-thrift-1.2.1.jar:/etc/alternatives/cassandrahome/lib/avro-1.4.0-fixes.jar:/etc/alternatives/cassandrahome/lib/avro-1.4.0-sources-fixes.jar:/etc/alternatives/cassandrahome/lib/commons-cli-1.1.jar:/etc/alternatives/cassandrahome/lib/commons-codec-1.2.jar:/etc/alternatives/cassandrahome/lib/commons-lang-2.6.jar:/etc/alternatives/cassandrahome/lib/compress-lzf-0.8.4.jar:/etc/alternatives/cassandrahome/lib/concurrentlinkedhashmap-lru-1.3.jar:/etc/alternatives/cassandrahome/lib/guava-13.0.1.jar:/etc/alternatives/cassandrahome/lib/high-scale-lib-1.1.2.jar:/etc/alternatives/cassandrahome/lib/jackson-core-asl-1.9.2.jar:/etc/alternatives/cassandrahome/lib/jackson-mapper-asl-1.9.2.jar:/etc/alternatives/cassandrahome/lib/jamm-0.2.5.jar:/etc/alternatives/cassandrahome/lib/jline-1.0.jar:/etc/alternatives/cassandrahome/lib/jna-3.5.1.jar:/etc/alternatives/cassandrahome/lib/json-simple-1.1.jar:/etc/alternatives/cassandrahome/lib/libthrift-0.7.0.jar:/etc/alternatives/cassandrahome/lib/log4j-1.2.16.jar:/etc/alternatives/cassandrahome/lib/metrics-core-2.0.3.jar:/etc/alternatives/cassandrahome/lib/netty-3.5.9.Final.jar:/etc/alternatives/cassandrahome/lib/servlet-api-2.5-20081211.jar:/etc/alternatives/cassandrahome/lib/slf4j-api-1.7.2.jar:/etc/alternatives/cassandrahome/lib/slf4j-log4j12-1.7.2.jar:/etc/alternatives/cassandrahome/lib/snakeyaml-1.6.jar:/etc/alternatives/cassandrahome/lib/snappy-java-1.0.4.1.jar:/etc/alternatives/cassandrahome/lib/snaptree-0.1.jar:/etc/alternatives/cassandrahome/lib/jamm-0.2.5.jar Killed I move the library back out of the lib directory and cassandra starts again albeit without JNA working quite naturally. Both my cassandra and java installs are tarball installs. Thanks Tim On Mon, Jan 28, 2013 at 6:29 PM, Tim Dunphy <bluethu...@gmail.com> wrote: > Hey List, > > I just downloaded 1.21 and have set it up across my cluster. When I > noticed the following notice: > > INFO 18:14:53,828 JNA not found. Native methods will be disabled. > > So I downloaded jna.jar from git hub and moved it to the cassandra /lib > directory. I changed mod to 755 as per the datastax docs. I've also tried > installing the jna package (via yum, I am using centos 6.2). Nothing seems > to do the trick, I keep getting this message. What can I do to get > cassandra 1.2.1 to recognize JNA? > > Thanks > Tim > -- > GPG me!! > > gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B > > -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B
