[TUSCANY-4035] Application could possibly fail to start if multiple threads are loading the same schema

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: Java-SCA-2.0
• Patch Info: Patch Available
• Assignee: Simon Laws
• Reporter: Kaushik Mukherjee
• Created: 22/Mar/12 16:41
• Updated: 23/Mar/12 17:29
• Resolved: 23/Mar/12 17:29

Description

This was an issue in Tuscany 1.x and is likely an issue in the 2.x code as well. The fix in 1.x was to synchronize schema loading across all XSDModelResolvers.

Starting multiple applications simultaneously can lead to an
exception such as:

org.apache.ws.commons.schema.XmlSchemaException: Schema name conflict in collection. Namespace: http://my.namespace
at
org.apache.ws.commons.schema.SchemaBuilder.handleXmlSchemaElement(SchemaBuilder.java:223)
at
org.apache.ws.commons.schema.SchemaBuilder.build(SchemaBuilder.java:202)
at
org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:424)
at
org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:347)
at
org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:379)
at
org.apache.tuscany.sca.xsd.xml.XSDModelResolver.loadOnDemand(XSDModelResolver.java:204)
at
org.apache.tuscany.sca.xsd.xml.XSDModelResolver.aggregate(XSDModelResolver.java:240)
at
org.apache.tuscany.sca.xsd.xml.XSDModelResolver.resolveModel(XSDModelResolver.java:114)