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https://issues.apache.org/jira/browse/AVRO-1807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15252217#comment-15252217
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Ryan Blue commented on AVRO-1807:
---------------------------------
Linking is under the "More" drop-down menu. Thanks for pointing this out and
filing a bug for it.
> NullPointerException from Json.ObjectWriter
> -------------------------------------------
>
> Key: AVRO-1807
> URL: https://issues.apache.org/jira/browse/AVRO-1807
> Project: Avro
> Issue Type: Bug
> Components: java
> Affects Versions: 1.8.1
> 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
> Priority: Blocker
>
> /* I posted this bug already to the dev-mailinglist [4]. Reporting it here
> again only to make sure it doesn't get lost and because this is the right
> place. */
> The complete, slightly more involved code is on [1], especially [2], the JSON
> schema is at [3], but the relevant parts of the code follow below.
> // parsing the schema
> Schema.Parser parser = new Schema.Parser();
> Schema schema = parser.parse(new File("schema.avsc")) ;
> // setting up the encoder and driver
> Json.ObjectWriter jsonDatumWriter = new Json.ObjectWriter();
> OutputStream output = new FileOutputStream(new File("output.json"));
> Encoder encoder = EncoderFactory.get().jsonEncoder(schema, output, pretty);
> // writing
> System.out.println(payload); // reassuring test the payload is intact
> jsonDatumWriter.write(payload, encoder);
> The console will print out a nice JSON string (the payload), 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 beginners guess is that the source of the problem is a call of asToken()
> in org.codehaus.jackson.JsonNode, which is abstract.
> [0]
> https://issues.apache.org/jira/browse/avro/?selectedTab=com.atlassian.jira.jira-projects-plugin:summary-panel
> [1] https://github.com/tomlurge/converTor
> [2]
> https://github.com/tomlurge/converTor/blob/master/src/converTor/WriterObject.java
> [3]
> https://github.com/tomlurge/converTor/blob/master/src/converTor/avro/schemata/Torperf.avsc
> [4]
> https://mail-archives.apache.org/mod_mbox/avro-dev/201603.mbox/ajax/%3C828828B1-8A58-4050-81B4-C3EF0F26041B%40rat.io%3E
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