I reproduced the “OutOfOrderScannerNextException” matching LP 1394702 (failure during trafodion upgrade) this morning. [trafodion@getafix-1 logs]$ sqlci Trafodion Conversational Interface 0.9.1 (c) Copyright 2014 Hewlett-Packard Development Company, LP. >>initialize trafodion, upgrade; Metadata Upgrade: started Version Check: started Metadata need to be upgraded from Version 2.3 to 3.0 Version Check: done Drop Old Metadata: started Drop Old Metadata: done Backup Current Metadata: started Backup Current Metadata: done Drop Current Metadata: started Drop Current Metadata: done Initialize New Metadata: started Initialize New Metadata: done Copy Old Metadata: started Restore from Old Metadata: started Restore from Old Metadata: done Drop Old Metadata: started Drop Old Metadata: done Metadata Upgrade: failed *** ERROR[8448] Unable to access Hbase interface. Call to ExpHbaseInterface::nextRow returned error HBASE_ACCESS_ERROR(-705). Cause: java.util.concurrent.ExecutionException: java.io.IOException: PerformScanResponse exception org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException: Expected nextCallSeq: 0 But the nextCallSeq got from client: 1 java.util.concurrent.FutureTask.report(FutureTask.java:122) java.util.concurrent.FutureTask.get(FutureTask.java:188) org.trafodion.sql.HBaseAccess.HTableClient.fetchRows(HTableClient.java:415) . --- SQL operation failed with errors. >> I moved in a later hbase-trx HDP 0.9.1 jar file matching a December 10th date. This date had some additional logging changes and multiple hbase-trx changes from the DTM team. With this version, the “initialize trafodion, upgrade” succeeded. [trafodion@getafix-1 logs]$ sqlci Trafodion Conversational Interface 0.9.1 (c) Copyright 2014 Hewlett-Packard Development Company, LP. >>initialize trafodion, upgrade; Metadata Upgrade: started Version Check: started Metadata need to be upgraded from Version 2.3 to 3.0 Version Check: done Drop Old Metadata: started Drop Old Metadata: done Backup Current Metadata: started Backup Current Metadata: done Drop Current Metadata: started Drop Current Metadata: done Initialize New Metadata: started Initialize New Metadata: done Copy Old Metadata: started Copy Old Metadata: done Validate Metadata Copy: started Validate Metadata Copy: done Customize New Metadata: started Start: Update COLUMNS End: Update COLUMNS Start: Update TABLES End: Update TABLES Start: Update TEXT End: Update TEXT Start: Update SEQ_GEN End: Update SEQ_GEN Customize New Metadata: done Delete Old Metadata Info: started Delete Old Metadata Info: done Update Metadata Views: started Update Metadata Views: done Update Priv Mgr: started Update Priv Mgr: done Update Metadata Version: started Update Metadata Version: done Drop Old Metadata from Hbase: started Drop Old Metadata from Hbase: done Metadata Upgrade to Version 3.0: done --- SQL operation complete. >> I did have full logging on for both runs. I’ve kept the logs that demonstrate the failures. Unfortunately, these logs do not contain the additional logging statements, so it’s not possible to really confirm what is the problem. The problem did not reproduce with the enhanced logging statements. We should continue some Trafodion upgrade testing with the latest Trafodion build to ensure this problem does not reoccur.