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From "chenxiaohu (JIRA)" <>
Subject [jira] Created: (OPENJPA-523) Map mapping error when use DataCache
Date Sun, 24 Feb 2008 04:15:19 GMT
Map mapping error when use DataCache

                 Key: OPENJPA-523
             Project: OpenJPA
          Issue Type: Bug
    Affects Versions: 1.0.2, 1.0.1, 1.0.0
         Environment: sunjdk 1.6.0_02
            Reporter: chenxiaohu

As the following two Entity A and B, a.getBMap() throws
Exception in thread "main" <openjpa-1.0.2-r420667:627158 fatal user error> org.apache.openjpa.persistence.ArgumentException:
Could not locate metadata for the class using oid "key=mapbug.B-51" of type "class java.util.HashMap$Entry".
 Registered oid type mappings: "{class java.util.HashMap$Entry=null, class org.apache.openjpa.util.LongId=class

when use DataCache
            <property name="openjpa.DataCache" value="true"/>
            <property name="openjpa.RemoteCommitProvider" value="sjvm"/>

public class A {
    @OneToMany(mappedBy="a", cascade=CascadeType.ALL, fetch=FetchType.LAZY)
    Map<String, B> bMap;

public class B {
    A a;

    String key;
    String value;

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