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From Thomas Lörtsch (JIRA) <j...@apache.org>
Subject [jira] [Commented] (AVRO-1807) NullPointerException from Json.ObjectWriter
Date Thu, 21 Apr 2016 11:44:25 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15251756#comment-15251756
] 

Thomas Lörtsch commented on AVRO-1807:
--------------------------------------

AVRO-1833 says "Please link issues that should be included in the 1.8.1 release as blockers
of this issue." I don't know how to "link" an issue - so I added "blocker" and "1.8.1" to
this issue. I hope that's not annoying or otherwise just wrong. Please correct if necessary.

> 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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