Major Description
When I try to use avro objects in a crunch job and it uses reflect to generate the schema crunch tries to verify the serialization of the entire ptype object which includes AvroReflectDeepCopier and throws the following exception:
java.lang.IllegalStateException: named 'null' cannot be serialized
at org.apache.crunch.impl.mem.collect.MemCollection.verifySerializable(MemCollection.java:104)
at org.apache.crunch.impl.mem.collect.MemCollection.parallelDo(MemCollection.java:123)
at org.apache.crunch.impl.mem.collect.MemCollection.parallelDo(MemCollection.java:117)
at org.apache.crunch.impl.mem.collect.MemCollection.parallelDo(MemCollection.java:112)
...
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68)
Caused by: org.apache.commons.lang.SerializationException: java.io.NotSerializableException: org.apache.avro.io.BinaryDecoder
- field (class "org.apache.crunch.types.avro.AvroDeepCopier$AvroReflectDeepCopier", name: "binaryDecoder", type: "class org.apache.avro.io.BinaryDecoder")
- object (class "org.apache.crunch.types.avro.AvroDeepCopier$AvroReflectDeepCopier", org.apache.crunch.types.avro.AvroDeepCopier$AvroReflectDeepCopier@1c25b8a7)
- field (class "org.apache.crunch.types.avro.AvroType", name: "deepCopier", type: "interface org.apache.crunch.types.DeepCopier")
- object (class "org.apache.crunch.types.avro.AvroType", org.apache.crunch.types.avro.AvroType@6889d368)
- field (class "com.rr.crunch.util.AggregationUtils$5", name: "val$ptype", type: "interface org.apache.crunch.types.PType")
- root object (class "com.rr.crunch.util.AggregationUtils$5", com.rr.crunch.util.AggregationUtils$5@fac80)
at org.apache.commons.lang.SerializationUtils.serialize(SerializationUtils.java:112)
at org.apache.commons.lang.SerializationUtils.serialize(SerializationUtils.java:134)
at org.apache.crunch.impl.mem.collect.MemCollection.verifySerializable(MemCollection.java:102)
... 29 more
I'm assuming that other than the valueClass, all the member variables below should be transient.
public static class AvroReflectDeepCopier<T> extends AvroDeepCopier<T> {
private DatumReader<T> datumReader;
private DatumWriter<T> datumWriter;
private BinaryEncoder binaryEncoder;
private BinaryDecoder binaryDecoder;
private final Class<T> valueClass;
Help greatly appreciated and let me know if this isn't an actual bug and is user error.