Sean Busbey created AVRO-1781:
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Summary: Schema.
Key: AVRO-1781
URL: https://issues.apache.org/jira/browse/AVRO-1781
Project: Avro
Issue Type: Bug
Components: java
Affects Versions: 1.8.0
Reporter: Sean Busbey
Priority: Blocker
Fix For: 1.8.0
Post AVRO-1497, Schema.parse calls {{LogicalTypes.fromSchemaIgnoreInvalid}} on
any schema that is expressed as a JSON object (anything except bare primitives).
That static method relies on a static cache based on WeakIdentityHashMap (WIHM).
WIHM clearly states that it isn't threadsafe
[ref|https://github.com/apache/avro/blob/branch-1.8/lang/java/avro/src/main/java/org/apache/avro/util/WeakIdentityHashMap.java#L42]
{code}
*
* Note that this implementation is not synchronized.
* </b>
*/
public class WeakIdentityHashMap<K, V> implements Map<K, V> {
{code}
All of the Schema.Parser instances use that same static Schema.parse method.
The end result is that as-is it's only safe to have a single thread parsing
schemas in a given JVM.
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