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https://issues.apache.org/jira/browse/CRUNCH-540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14617534#comment-14617534
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Josh Wills commented on CRUNCH-540:
-----------------------------------
Yeah, I'm assuming that's because of the change I made to AvroType to make its
initialized flag transient; if you don't have that included, you'll get an NPE
inside of AvroReflectDeepCopier b/c the underlying Configuration object is also
transient (as Sean pointed out.) That's what happened to me in the test I
created to verify the fix.
> AvroReflectDeepCopier not serializable (but crunch is trying!)
> --------------------------------------------------------------
>
> Key: CRUNCH-540
> URL: https://issues.apache.org/jira/browse/CRUNCH-540
> Project: Crunch
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.11.0, 0.12.0
> Reporter: Tyler Kohn
> Assignee: Josh Wills
> Attachments: CRUNCH-540.patch
>
>
> 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.
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