Hey, Embedded mode is used just for testing purposes and the only once process can connect to it at a time. Configure it as a local/remote metastore. Refer http://wiki.apache.org/hadoop/Hive/AdminManual/MetastoreAdmin for details .
Hope this helps. Thanks and Regards. On Thu, May 19, 2011 at 3:19 PM, labtrax <hi...@gmx.de> wrote: > Hello, > > I am running a cloudera hadoop/hbase cluster. I trying to integrate hive > with that. > I need multiple (read) accesses to hive per Java/jdbc-client. Is this > possible in any way? > Following this http://wiki.apache.org/hadoop/Hive/HiveServer it might not > be possible... > But what does it means exactly "The HiveServer is currently single > threaded, which could present serious use limitations"... > If the hive server does it sequentially with correct results its ok for me. > See also this: > https://issues.apache.org/jira/browse/HIVE-80 (entry 27/Jan/11 15:38) > > My initial plan was to get the concurrent accesses through multiple java > clients in embded mode. This seems not to work with a cluster unfortunately. > Seems "embedded mode" means it only works in hadoop embedded mode (without > hdfs/cluster) on a single maschine. > I always get > INFO metastore.HiveMetaStore: 0: Opening raw store with implemenation > class:null > Exception in thread "main" java.lang.NullPointerException > at java.lang.Class.forName0(Native Method) > at java.lang.Class.forName(Class.java:247) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getClass(HiveMetaStore.java:472) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:354) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.executeWithRetry(HiveMetaStore.java:306) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:451) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:232) > at > org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.<init>(HiveMetaStore.java:191) > at > org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.<init>(HiveServer.java:80) > at > org.apache.hadoop.hive.jdbc.HiveConnection.<init>(HiveConnection.java:84) > at > org.apache.hadoop.hive.jdbc.HiveDriver.connect(HiveDriver.java:110) > at java.sql.DriverManager.getConnection(DriverManager.java:582) > > Any clues? > > Thanks > labtrax > -- > Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir > belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de > > -- > Regards, > Bharath .V > w: <https://freundschaftswerbung.gmx.de> > http://researchweb.iiit.ac.in/~bharath.v > >
