Antoine Pitrou created ARROW-11483:
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Summary: [Java][C++][Integration] C++ integration test creates
JSON files incompatible with Java
Key: ARROW-11483
URL: https://issues.apache.org/jira/browse/ARROW-11483
Project: Apache Arrow
Issue Type: Bug
Components: C++, Integration, Java
Reporter: Antoine Pitrou
The C++ {{arrow-json-integration-test}} runner always emits an empty
{{children}} array for non-nested fields, but the Java JSON reader for some
reason uses an inflexible tokenize-based parsing technique and refuses such
files:
https://github.com/apache/arrow/blob/master/java/vector/src/main/java/org/apache/arrow/vector/ipc/JsonFileReader.java#L722-L740
Typically the error message is as follows:
{code}
Incompatible files
Expected END_OBJECT but got FIELD_NAME
16:30:12.557 [main] ERROR org.apache.arrow.tools.Integration - Incompatible
files
java.lang.IllegalStateException: Expected END_OBJECT but got FIELD_NAME
at
org.apache.arrow.vector.ipc.JsonFileReader.readToken(JsonFileReader.java:779)
at
org.apache.arrow.vector.ipc.JsonFileReader.readFromJsonIntoVector(JsonFileReader.java:740)
at
org.apache.arrow.vector.ipc.JsonFileReader.read(JsonFileReader.java:219)
at
org.apache.arrow.tools.Integration$Command$3.execute(Integration.java:203)
at org.apache.arrow.tools.Integration.run(Integration.java:118)
at org.apache.arrow.tools.Integration.main(Integration.java:69)
{code}
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