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Posted to commits@beam.apache.org by "Mike Pedersen (JIRA)" <ji...@apache.org> on 2018/08/02 11:22:00 UTC
[jira] [Created] (BEAM-5061) Invisible parameter type exception in
JDK 10
Mike Pedersen created BEAM-5061:
-----------------------------------
Summary: Invisible parameter type exception in JDK 10
Key: BEAM-5061
URL: https://issues.apache.org/jira/browse/BEAM-5061
Project: Beam
Issue Type: Bug
Components: beam-model
Affects Versions: 2.5.0
Reporter: Mike Pedersen
Assignee: Kenneth Knowles
When using JDK 10, using a ParDo after a CoGroupByKey seems to create the following exception when executed on local runner:
{noformat}
Exception in thread "main" org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.util.concurrent.UncheckedExecutionException: java.lang.IllegalStateException: Invisible parameter type of Main$1 arg0 for public Main$1$DoFnInvoker(Main$1)
at org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2214)
at org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.cache.LocalCache.get(LocalCache.java:4053)
at org.apache.beam.repackaged.beam_runners_direct_java.com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4057)
...
Caused by: java.lang.IllegalStateException: Invisible parameter type of Main$1 arg0 for public Main$1$DoFnInvoker(Main$1)
at org.apache.beam.repackaged.beam_sdks_java_core.net.bytebuddy.dynamic.scaffold.InstrumentedType$Default.validated(InstrumentedType.java:925)
at org.apache.beam.repackaged.beam_sdks_java_core.net.bytebuddy.dynamic.scaffold.MethodRegistry$Default.prepare(MethodRegistry.java:465)
at org.apache.beam.repackaged.beam_sdks_java_core.net.bytebuddy.dynamic.scaffold.subclass.SubclassDynamicTypeBuilder.make(SubclassDynamicTypeBuilder.java:170)
...
{noformat}
This error disappears completely when using JDK 8. Here is a minimal example to reproduce it:
++
{code:java}
import org.apache.beam.sdk.Pipeline;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.beam.sdk.options.PipelineOptionsFactory;
import org.apache.beam.sdk.transforms.Create;
import org.apache.beam.sdk.transforms.DoFn;
import org.apache.beam.sdk.transforms.ParDo;
import org.apache.beam.sdk.transforms.join.CoGbkResult;
import org.apache.beam.sdk.transforms.join.CoGroupByKey;
import org.apache.beam.sdk.transforms.join.KeyedPCollectionTuple;
import org.apache.beam.sdk.values.KV;
import org.apache.beam.sdk.values.PCollection;
import org.apache.beam.sdk.values.TupleTag;
import java.util.Arrays;
import java.util.List;
public class Main {
public static void main(String[] args) {
PipelineOptions options = PipelineOptionsFactory.create();
Pipeline p = Pipeline.create(options);
final TupleTag<String> emailsTag = new TupleTag<>();
final TupleTag<String> phonesTag = new TupleTag<>();
final List<KV<String, String>> emailsList =
Arrays.asList(
KV.of("amy", "amy@example.com"),
KV.of("carl", "carl@example.com"),
KV.of("julia", "julia@example.com"),
KV.of("carl", "carl@email.com"));
final List<KV<String, String>> phonesList =
Arrays.asList(
KV.of("amy", "111-222-3333"),
KV.of("james", "222-333-4444"),
KV.of("amy", "333-444-5555"),
KV.of("carl", "444-555-6666"));
PCollection<KV<String, String>> emails = p.apply("CreateEmails", Create.of(emailsList));
PCollection<KV<String, String>> phones = p.apply("CreatePhones", Create.of(phonesList));
PCollection<KV<String, CoGbkResult>> results =
KeyedPCollectionTuple.of(emailsTag, emails)
.and(phonesTag, phones)
.apply(CoGroupByKey.<String>create());
PCollection<String> contactLines =
results.apply(
ParDo.of(
new DoFn<KV<String, CoGbkResult>, String>() {
@ProcessElement
public void processElement(ProcessContext c) {
KV<String, CoGbkResult> e = c.element();
String name = e.getKey();
Iterable<String> emailsIter = e.getValue().getAll(emailsTag);
Iterable<String> phonesIter = e.getValue().getAll(phonesTag);
String formattedResult = "";
c.output(formattedResult);
}
}));
p.run().waitUntilFinish();
}
}{code}
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