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https://issues.apache.org/jira/browse/KYLIN-1461?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Li closed KYLIN-1461.
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> Avro: NullPointerException from Json.ObjectWriter
> -------------------------------------------------
>
> Key: KYLIN-1461
> URL: https://issues.apache.org/jira/browse/KYLIN-1461
> Project: Kylin
> Issue Type: Bug
> Components: General
> Environment: avro 1.8.0, jackson-core-asl 1.9.13, jackson-mapper-asl
> 1.9.13, Java 7, Mac OS X 10.11.3
> Reporter: Thomas Lörtsch
> Assignee: Dong Li
>
> The complete, slightly more involved code is on
> https://github.com/tomlurge/converTor, especially
> https://github.com/tomlurge/converTor/blob/master/src/converTor/WriterObject.java,
> but the relevant parts are as follows:
> Json.ObjectWriter jsonDatumWriter = new Json.ObjectWriter();
> OutputStream out = new FileOutputStream(outputFile);
> Encoder encoder = EncoderFactory.get().jsonEncoder(schema, out, pretty);
> System.out.println(load);
> jsonDatumWriter.write(load, encoder);
> ((Json.ObjectWriter) dataFileWriter).write(load, jsonEncoder);
> The console will print out a nice JSON string (load), followed by the
> following exception:
> Exception in thread "main" java.lang.NullPointerException
> at org.apache.avro.data.Json.write(Json.java:183)
> at org.apache.avro.data.Json.writeObject(Json.java:272)
> at org.apache.avro.data.Json.access$000(Json.java:48)
> at org.apache.avro.data.Json$ObjectWriter.write(Json.java:122)
> at converTor.WriterObject.append(WriterObject.java:59)
> at converTor.ConverTor.main(ConverTor.java:251)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
> My guess is that the problem is the call of asToken() in
> org.codehaus.jackson.JsonNode, which is abstract.
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