Re: Issue with Protobuf and Thrift content type

[Doug Cutting <cu...@apache.org>]

These errors appear to be caused by attempting to use an
Avro-generated class where a Thrift or Protobuf-generated class is
required.  The Thrift and Protobuf support in Avro permits you to read
and write instances of classes generated by the Thrift and Protobuf
compilers as Avro-format data.  It does not permit you to read and
write Thrift and Protobuf-format data using classes generated from an
Avro schema.

Doug

On Fri, Jun 14, 2013 at 1:30 AM, Shlok Thakur
<sh...@fonantrix.com> wrote:
> Hi,
>
>
>
> In my Java application,I want to provide support for Avro, Thrift and
> Protobuf. I am using java classes generated by avro schema and  avro idl.
> When I use ProtoBufDatumReader and ProtoBufDatumWriter classes to support
> encode and decode Protobuf content. I get following exception:
>
> java.lang.RuntimeException: java.lang.NoSuchMethodException:
> org.openrtb.common.api.BidRequest.getDescriptor()
>
>       at
> org.apache.avro.protobuf.ProtobufData.getSchema(ProtobufData.java:181)
>
>       at
> org.apache.avro.protobuf.ProtobufDatumWriter.<init>(ProtobufDatumWriter.java:36)
>
>       at
> org.openrtb.dsp.core.DemandSideServerTest.writeBidRequest(DemandSideServerTest.java:293)
>
>       at
> org.openrtb.dsp.core.DemandSideServerTest.protobufRespondTest(DemandSideServerTest.java:263)
>
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
>       at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
>       at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
>       at java.lang.reflect.Method.invoke(Method.java:597)
>
>       at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
>
>       at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
>
>       at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
>
>       at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
>
>       at
> org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
>
>       at
> org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
>
>       at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
>
>       at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
>
>       at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
>
>
>
> Similarly Thrift content type is also not working for me. Following is the
> exception:
>
> java.lang.NullPointerException: null of org.openrtb.common.api.BidRequest
>
>       at
> org.apache.avro.generic.GenericDatumWriter.npe(GenericDatumWriter.java:93)
>
>       at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:87)
>
>       at
> org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:58)
>
>       at
> org.openrtb.dsp.core.DemandSideServerTest.writeBidRequest(DemandSideServerTest.java:295)
>
>       at
> org.openrtb.dsp.core.DemandSideServerTest.thriftRespondTest(DemandSideServerTest.java:275)
>
>       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>
>       at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>
>       at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>
>       at java.lang.reflect.Method.invoke(Method.java:597)
>
>
>
> pls find the attachment to complete stack trace for  Protobuf & Thirft issue
>
> Can you pls advice and help me to resolve this issue.
>
>
>
> Regards
>
> Shlok Thakur