Java集成PDAL时执行uname命令报错，求解决方案

环境与配置 #

我按照PDAL的Java文档进行开发，已在pom.xml中添加以下依赖：

<dependency>
    <groupId>io.pdal</groupId>
    <artifactId>pdal-native</artifactId>
    <version>2.7.0</version>
</dependency>

<dependency>
    <groupId>io.pdal</groupId>
    <artifactId>pdal_3</artifactId>
    <version>2.7.0</version>
</dependency>

<dependency>
    <groupId>io.pdal</groupId>
    <artifactId>pdal-scala_2.13</artifactId>
    <version>2.7.0</version>
</dependency>

使用的Java代码如下：

Pipeline pipeline = new Pipeline(json, LogLevel.Info()); //该行报错
pipeline.execute();

报错信息 #

运行时抛出异常：

java.lang.RuntimeException: Error running uname command

完整堆栈跟踪：

java.lang.RuntimeException: Error running `uname` command
    at scala.sys.package$.error(package.scala:27) ~[scala-library-2.13.13.jar:na]
    at com.github.sbt.jni.syntax.NativeLoader$.liftedTree1$1(NativeLoader.scala:21) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.loadPackaged$1(NativeLoader.scala:22) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.load$1(NativeLoader.scala:56) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.load(NativeLoader.scala:59) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader.<init>(NativeLoader.scala:6) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at io.pdal.Pipeline$.<init>(Pipeline.scala:50) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline$.<clinit>(Pipeline.scala:50) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline.<init>(Pipeline.scala:30) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline.<init>(Pipeline.scala:33) ~[pdal_3-2.7.0.jar:2.7.0]
    at com.lidarapidemo.lidarprocessing.LidarProcessor.streamPointCloudPostgis(LidarProcessor.java:100) ~[classes/:na]
    at com.lidarapidemo.controllers.LidarController.lambda$pointsInBoundingBox$0(LidarController.java:39) ~[classes/:na]
    at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:110) ~[spring-webmvc-6.1.11.jar:6.1.11]
    at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:97) ~[spring-webmvc-6.1.11.jar:6.1.11]
    at org.springframework.web.context.request.async.WebAsyncManager.lambda$startCallableProcessing$4(WebAsyncManager.java:348) ~[spring-web-6.1.11.jar:6.1.11]
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) ~[na:na]
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
    at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]

2024-08-13T12:15:25.380+05:30 ERROR 2384 --- [lidarapidemo] [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Async processing failed: java.lang.ExceptionInInitializerError] with root cause

java.lang.RuntimeException: Error running `uname` command
    at scala.sys.package$.error(package.scala:27) ~[scala-library-2.13.13.jar:na]
    at com.github.sbt.jni.syntax.NativeLoader$.liftedTree1$1(NativeLoader.scala:21) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.loadPackaged$1(NativeLoader.scala:22) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.load$1(NativeLoader.scala:56) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader$.load(NativeLoader.scala:59) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at com.github.sbt.jni.syntax.NativeLoader.<init>(NativeLoader.scala:6) ~[sbt-jni-core_3-1.7.0.jar:1.7.0]
    at io.pdal.Pipeline$.<init>(Pipeline.scala:50) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline$.<clinit>(Pipeline.scala:50) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline.<init>(Pipeline.scala:30) ~[pdal_3-2.7.0.jar:2.7.0]
    at io.pdal.Pipeline.<init>(Pipeline.scala:33) ~[pdal_3-2.7.0.jar:2.7.0]
    at com.lidarapidemo.lidarprocessing.LidarProcessor.streamPointCloudPostgis(LidarProcessor.java:100) ~[classes/:na]
    at com.lidarapidemo.controllers.LidarController.lambda$pointsInBoundingBox$0(LidarController.java:39) ~[classes/:na]
    at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:110) ~[spring-webmvc-6.1.11.jar:6.1.11]
    at org.springframework.web.servlet.mvc.method.annotation.StreamingResponseBodyReturnValueHandler$StreamingResponseBodyTask.call(StreamingResponseBodyReturnValueHandler.java:97) ~[spring-webmvc-6.1.11.jar:6.1.11]
    at org.springframework.web.context.request.async.WebAsyncManager.lambda$startCallableProcessing$4(WebAsyncManager.java:348) ~[spring-web-6.1.11.jar:6.1.11]
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572) ~[na:na]
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[na:na]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[na:na]
    at java.base/java.lang.Thread.run(Thread.java:1583) ~[na:na]

问题 #

uname命令不在我的pipeline配置JSON中，不清楚它的来源，请问我遗漏了什么配置？

解决方案 #

原因分析 #

从堆栈跟踪可以看到，uname命令是由sbt-jni库在加载JNI本地库时调用的——它需要通过该命令判断当前操作系统类型，从而加载对应平台的PDAL本地库。这个命令是类Unix系统（Linux/macOS）下的标准命令，Windows系统默认没有这个命令，这是报错的核心原因。

解决步骤 #

1. 切换运行环境：如果可能，将程序部署到Linux或macOS环境下运行，这类系统原生支持uname命令，能正常加载PDAL的JNI库。
2. 精简依赖：你的pom中包含了scala相关依赖（pdal_3、pdal-scala_2.13），若只是纯Java开发，可尝试只保留pdal-native依赖，避免scala相关的JNI加载逻辑带来的问题。
3. Windows环境适配：
   • 手动添加uname命令：可以通过Git for Windows、Cygwin等工具给Windows添加类Unix命令集，并将其路径加入系统PATH环境变量。
   • 指定本地库路径：如果已经有Windows版本的PDAL本地库（.dll文件），可以通过JVM参数-Djava.library.path=你的本地库路径来指定加载路径，跳过自动检测逻辑。
4. 检查PDAL版本兼容性：确认你使用的PDAL 2.7.0版本的Java绑定是否支持当前运行系统，若Windows支持不佳，可尝试切换到更稳定的版本。

内容的提问来源于stack exchange，提问作者Mandroid