I am seeing this exception fairly regularly, does anyone know what I might be doing to cause this?

Caused by: java.lang.NullPointerException
    at java.io.StringReader.<init>(StringReader.java:33)
    at org.apache.derby.impl.services.uuid.BasicUUID.<init>(Unknown Source)
    at org.apache.derby.impl.services.uuid.BasicUUIDFactory.recreateUUID(Unknown Source)
    at org.apache.derby.impl.sql.catalog.SYSCONGLOMERATESRowFactory.buildDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getDescriptorViaIndexMinion(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getDescriptorViaIndex(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getConglomerateDescriptorsScan(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.finishTableDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getTableDescriptorIndex1Scan(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getUncachedTableDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.catalog.NameTDCacheable.setIdentity(Unknown Source)
    at org.apache.derby.impl.services.cache.ConcurrentCache.find(Unknown Source)
    at org.apache.derby.impl.sql.catalog.DataDictionaryImpl.getTableDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.compile.QueryTreeNode.getTableDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.compile.FromBaseTable.bindTableDescriptor(Unknown Source)
    at org.apache.derby.impl.sql.compile.FromBaseTable.bindNonVTITables(Unknown Source)
    at org.apache.derby.impl.sql.compile.FromList.bindTables(Unknown Source)
    at org.apache.derby.impl.sql.compile.SelectNode.bindNonVTITables(Unknown Source)
    at org.apache.derby.impl.sql.compile.DMLStatementNode.bindTables(Unknown Source)
    at org.apache.derby.impl.sql.compile.DMLStatementNode.bind(Unknown Source)
    at org.apache.derby.impl.sql.compile.CursorNode.bindStatement(Unknown Source)
    at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
    at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
    at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)



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David W. Van Couvering

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