I found the thrift definition using command “find . -name *.thrift” . But what’s wrong the remote metastore error?
On 09-2-7 下午5:07, "He Yongqiang" <[email protected]> wrote: > I see, Mtable and MStorageDescriptor both own a map named parameters, so we > can add new key,val pairs by putting into the parameters map. The parameters > map will be persisted as part of MTable, is that right? > > We actually may need to add new meta objects into the system, for example, we > want to distribute data ourselves and record some distribution information. > Avoiding to confuse the Mtable, MStorageDescriptor and MFieldSchema, these > newly added info should be separated. > Since the metadata access is through thrift, we need to work on this in the > thrift way. Where I can get started for this? Where is the thrift-related > definition? > > By the way, I have trouble in running the remote metastore with mysql, here is > the error msg: > org.jpox.jdo.exceptions.ClassNotPersistenceCapableException: The class "The > class "org.apache.hadoop.hive.metastore.model.MDatabase" is not persistable. > This means that it either hasnt been enhanced, or that the enhanced version of > the file is not in the CLASSPATH (or is hidden by an unenhanced version), or > the Meta-Data/annotations for the class are not found." is not persistable. > This means that it either hasnt been enhanced, or that the enhanced version of > the file is not in the CLASSPATH (or is hidden by an unenhanced version), or > the Meta-Data for the class is not found. > at > org.jpox.jdo.JPOXJDOHelper.getJDOExceptionForJPOXException(JPOXJDOHelper.java: > 255) > at > org.jpox.jdo.AbstractPersistenceManager.jdoMakePersistent(AbstractPersistenceM > anager.java:671) > at > org.jpox.jdo.AbstractPersistenceManager.makePersistent(AbstractPersistenceMana > ger.java:691) > at > org.apache.hadoop.hive.metastore.ObjectStore.createDatabase(ObjectStore.java:2 > 72) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(Hive > MetaStore.java:145) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.j > ava:115) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore > .java:94) > at > org.apache.hadoop.hive.metastore.HiveMetaStore.main(HiveMetaStore.java:625) > NestedThrowablesStackTrace: > The class "org.apache.hadoop.hive.metastore.model.MDatabase" is not > persistable. This means that it either hasnt been enhanced, or that the > enhanced version of the file is not in the CLASSPATH (or is hidden by an > unenhanced version), or the Meta-Data/annotations for the class are not found. > org.jpox.exceptions.ClassNotPersistableException: The class > "org.apache.hadoop.hive.metastore.model.MDatabase" is not persistable. This > means that it either hasnt been enhanced, or that the enhanced version of the > file is not in the CLASSPATH (or is hidden by an unenhanced version), or the > Meta-Data/annotations for the class are not found. > at > org.jpox.ObjectManagerImpl.assertClassPersistable(ObjectManagerImpl.java:3627) > at > org.jpox.ObjectManagerImpl.persistObjectInternal(ObjectManagerImpl.java:1135) > at > org.jpox.ObjectManagerImpl.persistObject(ObjectManagerImpl.java:1077) > at > org.jpox.jdo.AbstractPersistenceManager.jdoMakePersistent(AbstractPersistenceM > anager.java:666) > at > org.jpox.jdo.AbstractPersistenceManager.makePersistent(AbstractPersistenceMana > ger.java:691) > at > org.apache.hadoop.hive.metastore.ObjectStore.createDatabase(ObjectStore.java:2 > 72) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(Hive > MetaStore.java:145) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.j > ava:115) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore > .java:94) > at > org.apache.hadoop.hive.metastore.HiveMetaStore.main(HiveMetaStore.java:625) > > What I missed? > Thanks very much. > > On 09-2-7 下午1:47, "Prasad Chakka" <[email protected]> wrote: > >> What kind of data do you want to add? >> >> You can add arbitrary key, val pairs to table & sd metadata objects right >> now. It is a little bit of work If you want to add new objects. >> >> >> From: Yongqiang He <[email protected]> >> Reply-To: <[email protected]> >> Date: Fri, 6 Feb 2009 21:41:13 -0800 >> To: <[email protected]> >> Subject: Re: Why hive interact with the metastore through thrift? >> >> Ok. Thanks. >> What should I do if I want to extend the hive metadata, for example adding >> some fields to table/database schema or adding new meta types? -- Best regards! He Yongqiang Email: [email protected] Tel: 86-10-62600969(O) Fax：86-10-626000900 Key Laboratory of Network Science and Technology/ Research Center for Grid and Service Computing, Institute of Computing Technology, Chinese Academy of Sciences, No.3 Kexueyuan South Road, Beijing 100190, China
