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Julien Le Dem commented on ARROW-277: ------------------------------------- [~sphillips] do you have a test case to reproduce? I think I fixed this in my last commit https://github.com/apache/arrow/blame/803afeb502dcdd802fada2ed0d66c145546b8a78/java/vector/src/test/java/org/apache/arrow/vector/pojo/TestConvert.java#L82 https://github.com/apache/arrow/blame/803afeb502dcdd802fada2ed0d66c145546b8a78/java/vector/src/main/java/org/apache/arrow/vector/types/pojo/Field.java#L52 > Flatbuf serialization fails for Timestamp type > ---------------------------------------------- > > Key: ARROW-277 > URL: https://issues.apache.org/jira/browse/ARROW-277 > Project: Apache Arrow > Issue Type: Bug > Reporter: Steven Phillips > > Caused By (java.lang.AssertionError) FlatBuffers: object serialization must > not be nested. > com.google.flatbuffers.FlatBufferBuilder.notNested():293 > com.google.flatbuffers.FlatBufferBuilder.startVector():239 > com.google.flatbuffers.FlatBufferBuilder.createString():266 > org.apache.arrow.vector.types.pojo.ArrowType$Timestamp.getType():463 > org.apache.arrow.vector.types.pojo.Field.getField():63 > org.apache.arrow.vector.types.pojo.Schema.getSchema():41 -- This message was sent by Atlassian JIRA (v6.3.4#6332)