[zeromq-dev] java.lang.UnsatisfiedLinkError: no jzmq in java.library.path

[gonzalo diethelm]

You need TWO shared libraries in order to work with jzmq: one for 0MQ proper and one for jzmq. They should be called libzmq.so and jzmq.so or something similar. The point is, BOTH of them are required.

Then you need the jzmq JAR (zmq.jar) reachable at the time you run your java command. This would be take care of byt the -cp argument you are using.

You probably are missing putting jzmq.so in /usr/local/lib. Can you check?

Good luck,

--
Gonzalo Diethelm
DCV Chile

From: zeromq-dev-bounces at lists.zeromq.org [mailto:zeromq-dev-bounces at lists.zeromq.org] On Behalf Of John Cerwin
Sent: Tuesday, July 31, 2012 5:52 PM
To: zeromq-dev at lists.zeromq.org
Subject: [zeromq-dev] java.lang.UnsatisfiedLinkError: no jzmq in java.library.path

Hi,

I am running Fedora 17 with ZMQ 2.2. It works fine under C, but I get the following error in Java when I execute the following command:

java -Djava.library.path=/usr/local/lib  -cp /home/john/jzmq/src/zmq.jar:.  local_lat tcp://127.0.0.1:5000 1 100

Exception in thread "main" java.lang.UnsatisfiedLinkError: no jzmq in java.library.path
    at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1860)
    at java.lang.Runtime.loadLibrary0(Runtime.java:845)
    at java.lang.System.loadLibrary(System.java:1084)
    at org.zeromq.ZMQ.<clinit>(ZMQ.java:34)
    at local_lat.main(local_lat.java:36)

Here is what I have done so far:

1) Built zqm and jzmq on the same box (Fedora 17).
2) Followed the instructions here for Fedora: http://www.zeromq.org/bindings:java (***EXCEPT*** I am using zmq stable release 2.2 and NOT 2.1.10.)
3) Verified that libzmq is in /usr/local/lib, and that my java.library.path includes /usr/local/lib.
4) Verfied that the classpath includes zmq.jar.
5) Attempted to run it from both Eclipse and the shell  with the same resulting error.

It appears that the native library cannot be found.... but could it be the incorrect version of zmq (2.2 vs 2.1.10)?

Any help would be greatly appreciated!










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