Question

我正在尝试在安装了Arch linux ARM的Raspberry Pi2模型B上构建Pi4J。一切正常，除了JNI自然库的构建。这是错误消息（以及日志的一部分）：

    [INFO] --- maven-antrun-plugin:1.3:run (build-native-so) @ pi4j-native ---
[INFO] Executing tasks

build-libpi4j.so:
     [echo] Building native libpi4j shared library for ABI: hard-float
  [sshexec] Connecting to 192.168.178.94:22
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Pi4J :: Parent POM ................................. SUCCESS [01:04 min]
[INFO] Pi4J :: JNI Native Library ......................... FAILURE [ 18.906 s]
[INFO] Pi4J :: Java Library (Core) ........................ SKIPPED
[INFO] Pi4J :: GPIO Extension ............................. SKIPPED
[INFO] Pi4J :: Device Abstractions ........................ SKIPPED
[INFO] Pi4J :: Java Examples .............................. SKIPPED
[INFO] Pi4J :: OSGi Service ............................... SKIPPED
[INFO] Pi4J :: Distribution ............................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:50 min
[INFO] Finished at: 2015-08-11T20:50:37+00:00
[INFO] Final Memory: 11M/29M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.3:run (build-native-so) on project pi4j-native: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] /media/temp/pi4j-arch/pi4j-native/build.xml:10: com.jcraft.jsch.JSchException: Algorithm negotiation fail
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.3:run (build-native-so) on project pi4j-native: An Ant BuildException has occured: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:10: com.jcraft.jsch.JSchException: Algorithm negotiation fail
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: An Ant BuildException has occured: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:10: com.jcraft.jsch.JSchException: Algorithm negotiation fail
        at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:131)
        at org.apache.maven.plugin.antrun.AntRunMojo.execute(AntRunMojo.java:98)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
        ... 20 more
Caused by: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:10: com.jcraft.jsch.JSchException: Algorithm negotiation fail
        at org.apache.tools.ant.ProjectHelper.addLocationToBuildException(ProjectHelper.java:508)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:418)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:62)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at net.sf.antcontrib.logic.IfTask.execute(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:118)
        ... 23 more
Caused by: /media/temp/pi4j-arch/pi4j-native/build.xml:10: com.jcraft.jsch.JSchException: Algorithm negotiation fail
        at org.apache.tools.ant.taskdefs.optional.ssh.SSHExec.execute(SSHExec.java:188)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)
        ... 53 more
Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
        at com.jcraft.jsch.Session.receive_kexinit(Session.java:520)
        at com.jcraft.jsch.Session.connect(Session.java:286)
        at com.jcraft.jsch.Session.connect(Session.java:150)
        at org.apache.tools.ant.taskdefs.optional.ssh.SSHBase.openSession(SSHBase.java:212)
        at org.apache.tools.ant.taskdefs.optional.ssh.SSHExec.execute(SSHExec.java:158)
        ... 66 more

我尝试了所有我能想到的东西，但我无法让它发挥作用。请帮助：）

修改

经过一番进一步调查后，我开始了解这些消息的含义及其工作原理。这是build.xml的一部分，它给出了错误：

            <!-- ensure the target directory is empty on the Raspberry Pi -->
            <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                    password="${pi-password}" trust="true" failonerror="true"
                    verbose="true" command="rm --recursive --force ${pi-dirBuildTemp}" />

确切地说，它是以“详细”开头的行。我尝试编辑命令，删除部分内容......没有任何帮助。我尝试删除整个代码块，留下其他代码（看起来非常像），然后错误出现在下一个块的最后一行。这是整个/media/temp/pi4j-arch/pi4j-native/build.xml：

<?xml version="1.0" encoding="UTF-8"?>
<project name="pi4j-native" default="build-libpi4j.so" basedir=".">
    <target name="build-libpi4j.so">

        <echo message="Building native libpi4j shared library for ABI: ${pi-abi}"/>

                <!-- ensure the target directory is empty on the Raspberry Pi -->
                <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                        password="${pi-password}" trust="true" failonerror="true"
                        verbose="true" command="rm --recursive --force ${pi-dirBuildTemp}" />

                <!-- ensure the target directory exists on the Raspberry Pi -->
                <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                        password="${pi-password}" trust="true" failonerror="false"
                        verbose="true" command="mkdir --parents ${pi-dirBuildTemp}" />

                <!-- copy all the necessary source files to the Raspberry Pi -->
                <scp todir="${pi-user}:${pi-password}@${pi-host}:${pi-dirBuildTemp}"
                        port="${pi-port}" trust="true" verbose="true" failonerror="true">
                        <fileset dir="src/main/native" />
                </scp>

                <!-- download and compile the 'wiringPi.a' native static library on the Raspberry
                        Pi platform -->
                <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                        password="${pi-password}" trust="true" failonerror="true"
                        verbose="true" command="cd ${pi-dirBuildTemp}; sudo chmod +x wiringpi-build.sh; ./wiringpi-build.sh" />

                <!-- compile the 'lib4j.so' JNI native shared library on the Raspberry
                        Pi platform -->
                <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                        password="${pi-password}" trust="true" failonerror="true"
                        verbose="true" command="cd ${pi-dirBuildTemp}; make clean; make all" />

                <!-- copy the compiled 'lib4j.so' JNI native shared library back -->
                <scp
                        file="${pi-user}:${pi-password}@${pi-host}:${pi-dirBuildTemp}/libpi4j.so"
                        todir="${project-build-directory}/${pi-abi}/" port="${pi-port}" trust="true"
                        verbose="true" failonerror="true">
                </scp>

                <!-- remove the temporary target directory from the Raspberry Pi  -->
                <sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
                        password="${pi-password}" trust="true" failonerror="true"
                        verbose="true" command="rm --recursive --force ${pi-dirBuildTemp}" />

    </target>
</project>

问题可能不在代码本身，而是在sshexec命令中。但我仍然不明白它究竟是如何运作的，可能是什么问题。明天我将尝试删除变量并将值放在那里，只是为了实验。

EDIT2：我测试了它...在同一个地方仍然出现同样的错误......

如果有人有任何想法，请分享。

EDIT3：

非常感谢，prunge！现在我领先几步！我做了你建议的两件事，就像第一件没有用的那样（但我在尝试时忘了重新启动SSH，所以也许它会起作用。）

现在我又得到了另一个错误......我用google搜索时只得到一个结果，但我找不到他们正在谈论的文件： https://github.com/rm-hull/wiringPi/issues/2 而且我不确定这是否完全相同。

这是错误：

fatal: destination path 'wiringPi' already exists and is not an empty directory.
[UnInstall]
wiringPi Build script
=====================

The wiringPi I2C helper libraries will not be built.

WiringPi library
[UnInstall]
make: Nothing to be done for 'all'.
[Install]

GPIO Utility
[Link]
gpio.o: In function `main':
gpio.c:(.text.startup+0x194): undefined reference to `wiringPiSetupPiFaceForGpioProg'
gpio.c:(.text.startup+0x670): undefined reference to `gertboardSPISetup'
gpio.c:(.text.startup+0x684): undefined reference to `gertboardAnalogWrite'
gpio.c:(.text.startup+0x884): undefined reference to `gertboardSPISetup'
gpio.c:(.text.startup+0x894): undefined reference to `gertboardAnalogRead'
collect2: error: ld returned 1 exit status
Makefile:45: recipe for target 'gpio' failed
make: *** [gpio] Error 1

Make Failed...
Please check the messages and fix any problems. If you're still stuck,
then please email all the output and as many details as you can to
  projects@drogon.net

      [ant] Exiting /media/temp/pi4j-arch/pi4j-native/build.xml.
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] Pi4J :: Parent POM ................................. SUCCESS [01:07 min]
[INFO] Pi4J :: JNI Native Library ......................... FAILURE [04:05 min]
[INFO] Pi4J :: Java Library (Core) ........................ SKIPPED
[INFO] Pi4J :: GPIO Extension ............................. SKIPPED
[INFO] Pi4J :: Device Abstractions ........................ SKIPPED
[INFO] Pi4J :: Java Examples .............................. SKIPPED
[INFO] Pi4J :: OSGi Service ............................... SKIPPED
[INFO] Pi4J :: Distribution ............................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 05:41 min
[INFO] Finished at: 2015-08-13T17:01:08+00:00
[INFO] Final Memory: 12M/30M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.3:run (build-native-so) on project pi4j-native: An Ant BuildException has occured: The following error occurred while executing this line:
[ERROR] /media/temp/pi4j-arch/pi4j-native/build.xml:27: Remote command failed with exit status 1
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.3:run (build-native-so) on project pi4j-native: An Ant BuildException has occured: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:27: Remote command failed with exit status 1
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:216)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: An Ant BuildException has occured: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:27: Remote command failed with exit status 1
        at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:131)
        at org.apache.maven.plugin.antrun.AntRunMojo.execute(AntRunMojo.java:98)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
        ... 20 more
Caused by: The following error occurred while executing this line:
/media/temp/pi4j-arch/pi4j-native/build.xml:27: Remote command failed with exit status 1
        at org.apache.tools.ant.ProjectHelper.addLocationToBuildException(ProjectHelper.java:508)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:418)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:62)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at net.sf.antcontrib.logic.IfTask.execute(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.TaskAdapter.execute(TaskAdapter.java:154)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.maven.plugin.antrun.AbstractAntMojo.executeTasks(AbstractAntMojo.java:118)
        ... 23 more
Caused by: /media/temp/pi4j-arch/pi4j-native/build.xml:27: Remote command failed with exit status 1
        at org.apache.tools.ant.taskdefs.optional.ssh.SSHExec.executeCommand(SSHExec.java:250)
        at org.apache.tools.ant.taskdefs.optional.ssh.SSHExec.execute(SSHExec.java:162)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
        at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:497)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:357)
        at org.apache.tools.ant.Target.performTasks(Target.java:385)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:38)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:416)
        ... 53 more

我真的不知道它是如何工作的，我没有看到注释中的任何内容（在build.xml文件中）...这是导致错误的build.xml的一部分：

<!-- download and compile the 'wiringPi.a' native static library on the Raspberry
        Pi platform -->
<sshexec host="${pi-host}" port="${pi-port}" username="${pi-user}"
        password="${pi-password}" trust="true" failonerror="true"
        verbose="true" command="cd ${pi-dirBuildTemp};  sudo chmod +x wiringpi-build.sh; ./wiringpi-build.sh" />

我找不到wirespi-build.sh ......

谢谢和问候，克伦

Answer 1

它没有通过SSH协议与你的Pi交谈。

如果您还没有，可能需要尝试将unlimited strength encryption policy files安装到运行Maven的JDK / JRE中。这将允许在通过SSH连接时协商更多算法。

另一种方法是更改Pi上的SSHD配置文件，以允许JDK / JRE支持的某些算法JSCH。执行此操作的详细信息位于this answer。

Arch Linux ARMv7 - 使用maven的Pi4J构建在JNI失败

1 个答案: