NPE in MetaDataRepository when preloading is enabled under heavy stress.
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Key: OPENJPA-1630
URL: https://issues.apache.org/jira/browse/OPENJPA-1630
Project: OpenJPA
Issue Type: Bug
Components: kernel
Affects Versions: 2.0.0-beta3, 1.2.2, 2.0.0, 2.0.1, 2.1.0
Reporter: Rick Curtis
Assignee: Rick Curtis
A timing window exists in the MetaDataRepository where the following[1] NPE can
be encountered. It is incorrect to assume that calling processRegisteredClasses
at the end of preload would process all registered classes. As it turns out,
that call does process all registered classes that this instance of the MDR
cares about. The problem comes in when after the MDR is preloaded, Entities
that belong to a different PU are registered with the PCRegistry and they are
added to the _registered list.
[1] Caused by: java.lang.NullPointerException
at
org.apache.openjpa.meta.MetaDataRepository.processRegisteredClasses(MetaDataRepository.java:1622)
at
org.apache.openjpa.meta.ClassMetaData.getPCSubclasses(ClassMetaData.java:364)
at
org.apache.openjpa.meta.ClassMetaData.getPCSubclassMetaDatas(ClassMetaData.java:381)
at
org.apache.openjpa.meta.ClassMetaData.getMappedPCSubclassMetaDatas(ClassMetaData.java:403)
at
org.apache.openjpa.jdbc.meta.ClassMapping.getMappedPCSubclassMappings(ClassMapping.java:628)
at
org.apache.openjpa.jdbc.meta.ClassMapping.getIndependentAssignableMappings(ClassMapping.java:667)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initializeState(JDBCStoreManager.java:380)
at
org.apache.openjpa.jdbc.kernel.JDBCStoreManager.initialize(JDBCStoreManager.java:342)
at
com.ibm.ws.persistence.jdbc.kernel.WsJpaJDBCStoreManager.initialize(WsJpaJDBCStoreManager.java:147)
at
org.apache.openjpa.kernel.DelegatingStoreManager.initialize(DelegatingStoreManager.java:112)
at
org.apache.openjpa.kernel.ROPStoreManager.initialize(ROPStoreManager.java:57)
at org.apache.openjpa.kernel.BrokerImpl.initialize(BrokerImpl.java:1005)
at org.apache.openjpa.kernel.BrokerImpl.find(BrokerImpl.java:963)
... 46 more
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