How do I fix "incompatible JNA native library" when using Putty, Gradle, and the Gradle Git plugin?

Question

I have this simple build script:

import org.ajoberstar.grgit.Grgit

apply plugin: 'application'
apply plugin: 'org.ajoberstar.release-opinion'

task wrapper(type:Wrapper) {
    gradleVersion = '2.1'
}

buildscript {
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath 'org.ajoberstar:gradle-git:0.11.+'
  }
}

release {
  grgit = Grgit.open(project.file('.'))
}

I created a HelloWorld style project and initialized the git repository. When I use a directory for the remote origin I can run

.\gradlew.bat release

just fine. But when I use an ssh target for the remote origin I get the following output:

16:39:55.355 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter] Executing actions for task ':prepare'.
16:39:55.355 [INFO] [org.gradle.api.Task] Fetching changes from remote: origin
16:39:55.387 [INFO] [org.ajoberstar.grgit.auth.TransportOpUtil] The following authentication options are allowed (though they may not be available): [
HARDCODED, PAGEANT, SSHAGENT, INTERACTIVE]
16:39:55.402 [INFO] [org.ajoberstar.grgit.auth.TransportOpUtil] using interactive credentials, if needed
16:39:55.480 [INFO] [org.ajoberstar.grgit.auth.JschAgentProxySessionFactory] ssh-agent not available
16:39:55.511 [INFO] [org.ajoberstar.grgit.auth.JschAgentProxySessionFactory] pageant available
16:39:55.527 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':prepare'
16:39:55.527 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :prepare FAILED
16:39:55.543 [INFO] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] :prepare (Thread[main,5,main]) completed. Took 0.219 secs.
16:39:55.543 [DEBUG] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] Task worker [Thread[main,5,main]] finished, busy: 0.219 secs, idle: 0.0
 secs
16:39:55.543 [ERROR] [org.gradle.BuildExceptionReporter]
16:39:55.543 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
16:39:55.543 [ERROR] [org.gradle.BuildExceptionReporter]
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':prepare'.
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter] >
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]   There is an incompatible JNA native library installed on this system.
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]   To resolve this issue you may do one of the following:
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]    - remove or uninstall the offending library
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]    - set the system property jna.nosys=true
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]    - set jna.boot.library.path to include the path to the version of the
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]      jnidispatch library included with the JNA jar file you are using
16:39:55.558 [ERROR] [org.gradle.BuildExceptionReporter]
16:39:55.574 [ERROR] [org.gradle.BuildExceptionReporter]
16:39:55.574 [ERROR] [org.gradle.BuildExceptionReporter] * Try:
16:39:55.574 [ERROR] [org.gradle.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.
16:39:55.574 [LIFECYCLE] [org.gradle.BuildResultLogger]
16:39:55.574 [LIFECYCLE] [org.gradle.BuildResultLogger] BUILD FAILED

I reran with --stacktrace and here is the partial stack trace for this error (seems to implicate Jsch):

Caused by: java.lang.Error:
    at com.sun.jna.Native.<clinit>(Native.java:142)
    at com.jcraft.jsch.agentproxy.connector.PageantConnector$User32.<clinit>(PageantConnector.java:85)
    at com.jcraft.jsch.agentproxy.connector.PageantConnector.<init>(PageantConnector.java:61)
    at org.ajoberstar.grgit.auth.JschAgentProxySessionFactory$_closure2.doCall(JschAgentProxySessionFactory.groovy:122)
    at org.ajoberstar.grgit.auth.JschAgentProxySessionFactory$_closure2.doCall(JschAgentProxySessionFactory.groovy)
    at org.ajoberstar.grgit.auth.JschAgentProxySessionFactory$_determineConnector_closure5.doCall(JschAgentProxySessionFactory.groovy:86)
    at org.ajoberstar.grgit.auth.JschAgentProxySessionFactory.determineConnector(JschAgentProxySessionFactory.groovy:85)
    at org.ajoberstar.grgit.auth.JschAgentProxySessionFactory.getJSch(JschAgentProxySessionFactory.groovy:65)
    at org.eclipse.jgit.transport.JschConfigSessionFactory.createSession(JschConfigSessionFactory.java:191)
    at org.eclipse.jgit.transport.JschConfigSessionFactory.createSession(JschConfigSessionFactory.java:150)
    at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:109)
    at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:121)
    at org.eclipse.jgit.transport.TransportGitSsh$SshPushConnection.<init>(TransportGitSsh.java:306)
    at org.eclipse.jgit.transport.TransportGitSsh.openPush(TransportGitSsh.java:152)
    at org.eclipse.jgit.transport.PushProcess.execute(PushProcess.java:154)
    at org.eclipse.jgit.transport.Transport.push(Transport.java:1173)
    at org.eclipse.jgit.api.PushCommand.call(PushCommand.java:156)
    at org.eclipse.jgit.api.PushCommand.call(PushCommand.java:79)
    at java_util_concurrent_Callable$call$0.call(Unknown Source)
    at org.ajoberstar.grgit.operation.PushOp.call(PushOp.groovy:104)
    at org.ajoberstar.grgit.operation.PushOp.call(PushOp.groovy)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at java_util_concurrent_Callable$call.call(Unknown Source)
    at org.ajoberstar.grgit.util.OpSyntaxUtil.tryOp(OpSyntaxUtil.groovy:45)
    at org.ajoberstar.grgit.Grgit.methodMissing(Grgit.groovy:190)
    at org.ajoberstar.gradle.git.release.GrgitReleasePlugin$_addReleaseTask_closure4_closure14.doCall(GrgitReleasePlugin.groovy:134)
    ... 56 more

Any ideas on how to get this working?

I'm using Gradle 2.1, Gradle-git 0.11.0 (as you can see in the build script), Java 1.7.0_71 64-bit (there are other versions of Java on the system, but the PATH is set for this version and java -version outputs 1.7.0_71 64 bit), Putty 0.60, and git 1.9.0 msysgit.

Answer 1

Some possible reasons for this are:

• There was at least one bug in Gradle where the Gradle-side JNA "leaked" into other places, see https://issues.gradle.org/browse/GRADLE-3288, however it mainly was in RC-versions of Gradle 2.4

• I had one case where I did pass system properties from Gradle to the unit test via

  test { systemProperties = System.properties }

This leads to Gradle passing JNA-system properties on to the unit test. This was solved for me by the following:

test {
    systemProperties = System.properties

    systemProperties['jna.boot.library.path'] = null
}