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JNA not found with jna.jar in libs directory

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Started 12 months ago by
Latest reply from bluethundr
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Anonymous
Unregistered

I'm having some difficulty with a tarball install on a CentOS 6.2 minimal system. After placing jna.jar in the cassandra's lib directory, I'm receiving the following error:

JNA not found. Native methods will be disabled.

I'm starting with a completely fresh OS minimal install. For the sake of completeness I'll show here all the commands I use to install (note that java install is not shown).

Thank you,
Daniel

-------- INSTALL ------------------
# Install DataStax and OPSCenter
curl -OL http://downloads.datastax.com/community/dsc.tar.gz
curl -OL http://downloads.datastax.com/community/opscenter.tar.gz
tar -xzvf dsc.tar.gz
tar -xzvf opscenter.tar.gz

# jna
cd ~/dsc-cassandra-1.1.0/lib
wget https://github.com/twall/jna/blob/3.4.1/dist/jna.jar

nano /etc/security/limits.conf
###
cassandra soft memlock unlimited
cassandra hard memlock unlimited
root soft memlock unlimited
root hard memlock unlimited
###

# start cassandra
cd ~/dsc-cassandra-1.1.0
bin/cassandra

Posted 12 months ago #
Anonymous
Unregistered

Also, here is the output from starting Cassandra:

INFO 13:51:06,108 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.6.0_25
INFO 13:51:06,109 Heap size: 8342470656/8342470656
INFO 13:51:06,109 Classpath: bin/../conf:bin/../build/classes/main:bin/../build/classes/thrift:bin/../lib/antlr-3.2.jar:bin/../lib/apache-cassandra-1.1.0.jar:bin/../lib/apache-cassandra-clientutil-1.1.0.jar:bin/../lib/apache-cassandra-thrift-1.1.0.jar:bin/../lib/avro-1.4.0-fixes.jar:bin/../lib/avro-1.4.0-sources-fixes.jar:bin/../lib/commons-cli-1.1.jar:bin/../lib/commons-codec-1.2.jar:bin/../lib/commons-lang-2.4.jar:bin/../lib/compress-lzf-0.8.4.jar:bin/../lib/concurrentlinkedhashmap-lru-1.2.jar:bin/../lib/guava-r08.jar:bin/../lib/high-scale-lib-1.1.2.jar:bin/../lib/jackson-core-asl-1.9.2.jar:bin/../lib/jackson-mapper-asl-1.9.2.jar:bin/../lib/jamm-0.2.5.jar:bin/../lib/jline-0.9.94.jar:bin/../lib/jna.jar:bin/../lib/json-simple-1.1.jar:bin/../lib/libthrift-0.7.0.jar:bin/../lib/log4j-1.2.16.jar:bin/../lib/metrics-core-2.0.3.jar:bin/../lib/servlet-api-2.5-20081211.jar:bin/../lib/slf4j-api-1.6.1.jar:bin/../lib/slf4j-log4j12-1.6.1.jar:bin/../lib/snakeyaml-1.6.jar:bin/../lib/snappy-java-1.0.4.1.jar:bin/../lib/snaptree-0.1.jar:bin/../lib/jamm-0.2.5.jar
INFO 13:51:06,110 JNA not found. Native methods will be disabled.
INFO 13:51:06,116 Loading settings from file:/root/dsc-cassandra-1.1.0/conf/cassandra.yaml
INFO 13:51:06,191 DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap
INFO 13:51:06,310 Global memtable threshold is enabled at 2652MB
INFO 13:51:06,389 Initializing key cache with capacity of 100 MBs.
INFO 13:51:06,396 Scheduling key cache save to each 14400 seconds (going to save all keys).
INFO 13:51:06,397 Initializing row cache with capacity of 0 MBs and provider org.apache.cassandra.cache.SerializingCacheProvider
INFO 13:51:06,399 Scheduling row cache save to each 0 seconds (going to save all keys).
INFO 13:51:06,449 Opening /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hc-2 (163 bytes)
INFO 13:51:06,449 Opening /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hc-1 (234 bytes)
INFO 13:51:06,478 Couldn't detect any schema definitions in local storage.
INFO 13:51:06,478 Found table data in data directories. Consider using the CLI to define your schema.
INFO 13:51:06,490 completed pre-loading (2 keys) key cache.
INFO 13:51:06,599 Replaying /var/lib/cassandra/commitlog/CommitLog-432104970661.log, /var/lib/cassandra/commitlog/CommitLog-432001484482.log
INFO 13:51:06,600 Replaying /var/lib/cassandra/commitlog/CommitLog-432104970661.log
INFO 13:51:06,600 Finished reading /var/lib/cassandra/commitlog/CommitLog-432104970661.log
INFO 13:51:06,600 Replaying /var/lib/cassandra/commitlog/CommitLog-432001484482.log
INFO 13:51:06,612 Finished reading /var/lib/cassandra/commitlog/CommitLog-432001484482.log
INFO 13:51:06,685 Enqueuing flush of Memtable-Versions@1729398275(83/103 serialized/live bytes, 3 ops)
INFO 13:51:06,686 Writing Memtable-Versions@1729398275(83/103 serialized/live bytes, 3 ops)
INFO 13:51:06,861 Completed flushing /var/lib/cassandra/data/system/Versions/system-Versions-hc-1-Data.db (247 bytes)
INFO 13:51:06,867 Log replay complete, 3 replayed mutations
INFO 13:51:06,874 Cassandra version: 1.1.0
INFO 13:51:06,875 Thrift API version: 19.30.0
INFO 13:51:06,877 CQL supported versions: 2.0.0,3.0.0-beta1 (default: 2.0.0)
INFO 13:51:06,904 Loading persisted ring state
INFO 13:51:06,905 Starting up server gossip
INFO 13:51:06,911 Enqueuing flush of Memtable-LocationInfo@413918804(29/36 serialized/live bytes, 1 ops)
INFO 13:51:06,911 Writing Memtable-LocationInfo@413918804(29/36 serialized/live bytes, 1 ops)
INFO 13:51:07,068 Completed flushing /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hc-3-Data.db (80 bytes)
INFO 13:51:07,075 Starting Messaging Service on port 7000
INFO 13:51:07,079 Using saved token 164986434265921019703539854051593357886
INFO 13:51:07,080 Enqueuing flush of Memtable-LocationInfo@1145105632(53/66 serialized/live bytes, 2 ops)
INFO 13:51:07,081 Writing Memtable-LocationInfo@1145105632(53/66 serialized/live bytes, 2 ops)
INFO 13:51:07,219 Completed flushing /var/lib/cassandra/data/system/LocationInfo/system-LocationInfo-hc-4-Data.db (163 bytes)
INFO 13:51:07,220 Node localhost/127.0.0.1 state jump to normal
INFO 13:51:07,221 Bootstrap/Replace/Move completed! Now serving reads.
INFO 13:51:07,222 Will not load MX4J, mx4j-tools.jar is not in the classpath

Posted 12 months ago #
Anonymous
Unregistered

This comes from Hadoop, not Cassandra, so if you insist on putting it into some DSE libraries, you should put it into hadoop/lib. But, I recommend putting JNA into /usr/share/java, so that all applications can use it. This is also where it gets installed if you install JNA from package.

Posted 12 months ago #
Anonymous
Unregistered

I just tried creating the /usr/share/java directory and placing jna.jar there, but the same error is still being shown.

Posted 12 months ago #
bluethundr
Member
Dude. I was having the EXACT same problem you were having. Pulling out my hair over it. This is how I solved it. At the operating system level.
```
[root@cassandra-node01 cassandrahome]# yum provides "*/jna.jar"

jna-3.2.4-2.el6.x86_64 : Pure Java access to native libraries
Repo        : base
Matched from:
Filename    : /usr/share/java/jna.jar
```
[root@cassandra-node01 cassandrahome]# yum install jna-3.2.4-2.el6.x86_64

[root@cassandra-node01 cassandrahome]# ln -s /usr/share/java/jna.jar /usr/local/apache-cassandra-1.2.1/lib/jna.jar

And now, my friend, life is beautiful! Upon ./bin/cassandra -f

INFO 15:12:28,609 JNA mlockall successful

:)

I see this is an old thread. Wish I could have been there for you when you were having this problem. If you still haven't figured this out by now I hope this helps you or someone else who needs it.
Posted 4 months ago #

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