org.apache.avro.AvroRuntimeException: Schema fields not set yet

	at org.apache.avro.Schema$RecordSchema.getFields(Schema.java:955)
	at org.apache.avro.Schema.isValidDefault(Schema.java:1789)
	at org.apache.avro.Schema.isValidDefault(Schema.java:1747)
	at org.apache.avro.Schema.validateDefault(Schema.java:1717)
	at org.apache.avro.Schema$Field.<init>(Schema.java:578)
	at org.apache.avro.Schema.parseField(Schema.java:1903)
	at org.apache.avro.Schema.parseRecord(Schema.java:1872)
	at org.apache.avro.Schema.parse(Schema.java:1835)
	at org.apache.avro.Schema.parseUnion(Schema.java:1971)
	at org.apache.avro.Schema.parse(Schema.java:1848)
	at org.apache.avro.Schema.parseField(Schema.java:1891)
	at org.apache.avro.Schema.parseRecord(Schema.java:1872)
	at org.apache.avro.Schema.parse(Schema.java:1835)
	at org.apache.avro.Schema.parseField(Schema.java:1891)
	at org.apache.avro.Schema.parseRecord(Schema.java:1872)
	at org.apache.avro.Schema.parse(Schema.java:1835)
	at org.apache.avro.Schema.parseUnion(Schema.java:1971)
	at org.apache.avro.Schema.parse(Schema.java:1848)
	at org.apache.avro.Schema.parseField(Schema.java:1891)
	at org.apache.avro.Schema.parseRecord(Schema.java:1872)
	at org.apache.avro.Schema.parse(Schema.java:1835)
	at org.apache.avro.Schema$Parser.parse(Schema.java:1538)
	at org.apache.avro.Schema$Parser.parse(Schema.java:1515)
	at <the place where we call new Schema.Parser().parse(theSchema)>