The scaffolding tutorial fails with java.lang.UnsatisfiedLinkError: Can't obtain static newInstance method for class com.sun.jna.Structure at com.sun.jna.Native.initIDs #131
Comments
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Sounds like some sort of JNA problem, but I haven't seen this before so I'm not sure. Perhaps your system java doesn't use that libjna? |
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It does sound like that indeed; but I thought JNA is a self-containing .jar? Do I need any special dance for openjdk to use JNA? (I'll google for sure and will report if/when solved, it's just if you happen to know, that'd be great) |
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One more question... at https://github.com/aphyr/jepsen, you say that one needs to install |
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JNA itself seems to be fine: alexey@instance-1:~/jna-test$ cat HelloWorld.java
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.Platform;
/** Simple example of JNA interface mapping and usage. */
public class HelloWorld {
// This is the standard, stable way of mapping, which supports extensive
// customization and mapping of Java to native types.
public interface CLibrary extends Library {
CLibrary INSTANCE = (CLibrary)
Native.loadLibrary((Platform.isWindows() ? "msvcrt" : "c"),
CLibrary.class);
void printf(String format, Object... args);
}
public static void main(String[] args) {
CLibrary.INSTANCE.printf("Hello, World\n");
for (int i=0;i < args.length;i++) {
CLibrary.INSTANCE.printf("Argument %d: %s\n", i, args[i]);
}
}
}
alexey@instance-1:~/jna-test$ javac -classpath /usr/share/java/jna.jar HelloWorld.java
alexey@instance-1:~/jna-test$ java -classpath /usr/share/java/jna.jar:. HelloWorld
Hello, World
alexey@instance-1:~/jna-test$ |
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The JNA in the maven repo isn't: It seems that it might make sense to upgrade JNA in jepsen dependencies... |
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Changing the project file to (defproject jepsen.hazelcast "0.1.0-SNAPSHOT"
:description "Jepsen: Hazelcast"
:url "http://www.kamchatkaltd.co.uk/jepsen-hazelcast"
:license {:name "Eclipse Public License"
:url "http://www.eclipse.org/legal/epl-v10.html"}
:dependencies [[org.clojure/clojure "1.7.0"]
[jepsen "0.0.9" :exclude net.java.dev.jna/jna]
[avout "0.5.4"]
[net.java.dev.jna/jna "4.1.0"]])seems to do the trick. |
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Yep, it does... @aphyr, will it make any sense to adjust the tutorial and/or the dependencies? I solved the problem for myself by overriding the dependency, but am happy to dig further, e.g. finding a compatible version of jsch. |
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Looks like this jna dep is required by com.jcraft/jsch.agentproxy.usocket-jna, which is pulled in by clj-ssh 0.5.14, so if you're having compatibility problems with that jna package, perhaps it's worth filing a ticket on jsch? Since this has (so far) worked for other users, I'm hesitant to add a dep exclusion that could break that support--but I also don't understand JNA that well so I could be wrong. |
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java.lang.ExceptionInInitializerError How to solution this error |
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java.lang.ExceptionInInitializerError how to solution of this error ??? rep me |
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Sounds like your JVM doesn't have JNA set up? |
Trying to follow https://github.com/aphyr/jepsen/blob/master/doc/scaffolding.md, got the following problem at the step "Next, we'll replace the example test that lein generated (test/jepsen/zookeeper_test.clj) with one that calls the zk-test function, runs the test that function returns, looks at the results, and ensures that the :valid? key is true."
The stack trace is as follows:
(I did call the test
jepsen.hazelcast, but otherwise it's the same dummy test)The system is as follows:
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