无法从beamSql，apache beam中的工厂方法DataflowRunner＃fromOptions构造实例

I'm specifying dataflow runner in my beamSql program below :

我在下面的beamSql程序中指定了dataflow runner：

DataflowPipelineOptions options = PipelineOptionsFactory.as(DataflowPipelineOptions.class);
    options.setStagingLocation("gs://gcpbucket/staging");
    options.setTempLocation("gs://gcpbucket/tmp");
    options.setProject("beta-19xxxx");
    options.setRunner(DataflowRunner.class);
    Pipeline p = Pipeline.create(options);

But I'm getting below exception :

但我得到以下异常：

Exception in thread "main" java.lang.RuntimeException: Failed to construct instance from factory method DataflowRunner#fromOptions(interface org.apache.beam.sdk.options.PipelineOptions)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:233)
at org.apache.beam.sdk.util.InstanceBuilder.build(InstanceBuilder.java:162)
at org.apache.beam.sdk.PipelineRunner.fromOptions(PipelineRunner.java:55)
at org.apache.beam.sdk.Pipeline.create(Pipeline.java:150)
at my.proj.StarterPipeline.main(StarterPipeline.java:34)Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.beam.sdk.util.InstanceBuilder.buildFromMethod(InstanceBuilder.java:222)
... 4 more Caused by: java.lang.IllegalArgumentException: Unable to use ClassLoader to detect classpath elements. Current ClassLoader is jdk.internal.loader.ClassLoaders$AppClassLoader@782830e, only URLClassLoaders are supported.
at org.apache.beam.runners.dataflow.repackaged.org.apache.beam.runners.core.construction.PipelineResources.detectClassPathResourcesToStage(PipelineResources.java:43)
at org.apache.beam.runners.dataflow.DataflowRunner.fromOptions(DataflowRunner.java:262)

can anyone help me out understand what exactly is the issue ?

任何人都可以帮我理解究竟是什么问题？

1 个解决方案

#1

Downgrading java 9 to java 8 did the trick.

将Java 9降级为java 8就可以了。