甲骨文的Clob读者问题：违反协议

Question

我使用java7，jboss7，ojdbc7，休眠4. 表有一个CLOB列，并在域类的代码是这样的：

@Lob 私人字符串MyClob ;

我收到这个奇怪的错误，而查询时，这是不一致的。

Caused by: javax.persistence.PersistenceException: org.hibernate.HibernateException: IOException occurred reading text 
     at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387) 
     at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310) 
     at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:273) 
     at org.hibernate.ejb.criteria.CriteriaQueryCompiler$3.getResultList(CriteriaQueryCompiler.java:254) 
     ... 
     ... 102 more 
Caused by: org.hibernate.HibernateException: IOException occurred reading text 
     at org.hibernate.type.descriptor.java.DataHelper.extractString(DataHelper.java:94) 
     at org.hibernate.type.descriptor.java.DataHelper.extractString(DataHelper.java:280) 
     at org.hibernate.type.descriptor.java.StringTypeDescriptor.wrap(StringTypeDescriptor.java:89) 
     at org.hibernate.type.descriptor.java.StringTypeDescriptor.wrap(StringTypeDescriptor.java:39) 
     at org.hibernate.type.descriptor.sql.ClobTypeDescriptor$1.doExtract(ClobTypeDescriptor.java:60) 
     at org.hibernate.type.descriptor.sql.BasicExtractor.extract(BasicExtractor.java:64) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:261) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:257) 
     at org.hibernate.type.AbstractStandardBasicType.nullSafeGet(AbstractStandardBasicType.java:247) 
     at org.hibernate.type.AbstractStandardBasicType.hydrate(AbstractStandardBasicType.java:332) 
     at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2912) 
     at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1672) 
     at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1604) 
     at org.hibernate.loader.Loader.getRow(Loader.java:1504) 
     at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:712) 
     at org.hibernate.loader.Loader.processResultSet(Loader.java:942) 
     at org.hibernate.loader.Loader.doQuery(Loader.java:910) 
     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:341) 
     at org.hibernate.loader.Loader.doList(Loader.java:2522) 
     at org.hibernate.loader.Loader.doList(Loader.java:2508) 
     at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2338) 
     at org.hibernate.loader.Loader.list(Loader.java:2333) 
     at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:490) 
     at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:355) 
     at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:195) 
     at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1269) 
     at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101) 
     at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:264) 
     ... 104 more 
Caused by: java.io.IOException: Protocol violation: [ 14, 47, ] 
     at oracle.jdbc.driver.OracleClobReader.needChars(OracleClobReader.java:264) 
     at oracle.jdbc.driver.OracleClobReader.read(OracleClobReader.java:195) 
     at org.hibernate.type.descriptor.java.DataHelper.extractString(DataHelper.java:86) 
     ... 131 more 
Caused by: java.sql.SQLException: Protocol violation: [ 14, 47, ] 
     at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:669) 
     at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:249) 
     at oracle.jdbc.driver.T4C8TTIClob.read(T4C8TTIClob.java:245) 
     at oracle.jdbc.driver.T4CConnection.getChars(T4CConnection.java:3901) 
     at oracle.sql.CLOB.getChars(CLOB.java:517) 
     at oracle.jdbc.driver.OracleClobReader.needChars(OracleClobReader.java:245) 

Answer 1

问题与ojdbc7 jar。 如果clob的长度为4193个字符，则驱动程序无法检索。 使用新的OJDBC7补丁罐