python4j spring boot jar PythonExecutioner init error

1

In spring boot application, I builded a jar with maven 3.9.5, and then run it: java -jar true-north.jar.

PythonExecutioner.init got a error:

java.lang.ExceptionInInitializerError: null
at com.banji.truenorth.runner.ApplicationInitRunner.run(ApplicationInitRunner.java:16)
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:756)
at org.springframework.boot.SpringApplication.lambda$callRunners$2(SpringApplication.java:746)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.stream.SortedOps$SizedRefSortingSink.end(SortedOps.java:357)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:744)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1289)
at com.banji.truenorth.TrueNorthApplication.main(TrueNorthApplication.java:16)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:65)
Caused by: java.lang.RuntimeException: java.io.FileNotFoundException: JAR entry org/bytedeco/cpython/windows-x86_64/bin/python.exe not found in D:\java_work\TrueNorth-Server\start\target\true-north.jar
at org.nd4j.python4j.PythonExecutioner.initPythonPath(PythonExecutioner.java:363)
at org.nd4j.python4j.PythonExecutioner.init(PythonExecutioner.java:79)
at org.nd4j.python4j.PythonExecutioner.(PythonExecutioner.java:70)
… 24 common frames omitted
Caused by: java.io.FileNotFoundException: JAR entry org/bytedeco/cpython/windows-x86_64/bin/python.exe not found in D:\java_work\TrueNorth-Server\start\target\true-north.jar
at org.springframework.boot.loader.jar.JarURLConnection.throwFileNotFound(JarURLConnection.java:175)
at org.springframework.boot.loader.jar.JarURLConnection.connect(JarURLConnection.java:98)
at org.springframework.boot.loader.jar.JarURLConnection.getJarFile(JarURLConnection.java:106)
at org.bytedeco.javacpp.Loader.extractResource(Loader.java:777)
at org.bytedeco.javacpp.Loader.extractResource(Loader.java:756)
at org.bytedeco.javacpp.Loader.extractResource(Loader.java:803)
at org.bytedeco.javacpp.Loader.cacheResource(Loader.java:684)
at org.bytedeco.javacpp.Loader.cacheResource(Loader.java:477)
at org.bytedeco.javacpp.Loader.cacheResource(Loader.java:444)
at org.bytedeco.javacpp.Loader.cacheResource(Loader.java:432)
at org.bytedeco.cpython.presets.python.cachePackage(python.java:222)
at org.bytedeco.cpython.presets.python.cachePackages(python.java:264)
at org.nd4j.python4j.PythonExecutioner.cachePackages(PythonExecutioner.java:372)
at org.nd4j.python4j.PythonExecutioner.initPythonPath(PythonExecutioner.java:323)
… 26 common frames omitted

2

@aizhimin same ask as on the issue. Please post more information to make sure it’s not a native loading issue.
This:
Caused by: java.io.FileNotFoundException: JAR entry org/bytedeco/cpython/windows-x86_64/bin/python.exe not found in D:\java_work\TrueNorth-Server\start\target\true-north.jar
at

either indicates the python file has a native (think dll hell) type conflict or you’re missing something in your dependencies. While you’re at it, could you post your pom.xml please? I don’t want any company secrets or anything just the relevant parts mainly. python4j and spring boot and any other open source 3rd party libraries you might be using.

3

The javacpp’s bug, it needs javacpp 1.5.9.

4

@aizhimin that’s already fixed in the latest then.I would try forcing the javacpp 1.5.9 dependency via dependemcnyManagement.