[jira] [Commented] (AVRO-2074) SchemaValidator can't cope with recursive schemas?

["Nandor Kollar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AVRO-2074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16207753#comment-16207753 ] 

Nandor Kollar commented on AVRO-2074:
-------------------------------------

[~zkobza] are you sure that it is a regression, and works fine in Avro 1.8.1? I checked out {{release-1.8.1}} tag from Avro Github repository, and this test case failed:
{code}
  @Test
  public void testRecursiveSchema() throws SchemaValidationException {
    Schema record = Schema.createRecord("List", null, null, false);
    record.setFields(asList(new Schema.Field("head", Schema.create(Schema.Type.INT), null, null),
      new Schema.Field("tail", record, null, null)));
    new SchemaValidatorBuilder().canReadStrategy().validateAll().validate(record, asList(record));
  }
{code}

It failed on {{master}}, and on {{release-1.8.0}} release tag too. Could you please tell me how did you verify that it is okay on Avro 1.8.1?

> SchemaValidator can't cope with recursive schemas?
> --------------------------------------------------
>
>                 Key: AVRO-2074
>                 URL: https://issues.apache.org/jira/browse/AVRO-2074
>             Project: Avro
>          Issue Type: Bug
>          Components: java
>            Reporter: Nandor Kollar
>
> When trying to validate a record which is recursively defined:
> {code}
>     Schema record = Schema.createRecord("List", null, null, false);
>     record.setFields(list(new Schema.Field("head", Schema.create(Schema.Type.INT), null, null),
>       new Schema.Field("tail", record, null, null)));
> {code}
> then schema validation
> {code}
> new SchemaValidatorBuilder().canReadStrategy().validateAll().validate(record, asList(record));
> {code}
> fails with StackOverflowError:
> {code}
> java.lang.StackOverflowError
> 	at org.apache.avro.io.parsing.Symbol$Sequence.flattenedSize(Symbol.java:337)
> 	at org.apache.avro.io.parsing.Symbol.flattenedSize(Symbol.java:230)
> 	at org.apache.avro.io.parsing.Symbol$Sequence.flattenedSize(Symbol.java:337)
> {code}



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