[AVRO-1620] Classloader Differences When Copying Records Results in ClassCastException

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.7.7
• Component/s: java
• Assignee: Unassigned
• Reporter: Allan Shoup
• Created: 10/Dec/14 22:19
• Updated: 11/Dec/14 18:40

Description

Similar to the situation described in AVRO-1240, a parent classloader contains the avro classes and a separate classloader contains the avro specific record classes. When using the generated

newBuilder(SpecificRecord other)

or

newBuilder(SpecificRecord.Builder other)

methods to duplicate records, the generated code will cause an exception similar to this:

Caused by: java.lang.ClassCastException: org.apache.avro.generic.GenericData$Record cannot be cast to my.specific.Record
	at my.specific.Record$Builder.<init>(Record.java:149)
	at my.specific.Record$Builder.<init>(Record.java:121)
	at my.specific.Record.newBuilder(Record.java:115)
	... 19 more