A full stack trace would help determine is this is a Tez issue or hive issue.
From: Jim Green [mailto:[email protected]] Sent: Tuesday, July 21, 2015 11:12 AM To: [email protected]; [email protected] Subject: Hive on Tez query failed with “wrong key class" Hi Team, Env: Hive 1.0 on Tez 0.5.3 Query is a simple group-by on top of sequence table. It fails with below error on tez mode: java.lang.RuntimeException: org.apache.hadoop.hive.ql.metadata.HiveException: java.io.IOException: java.io.IOException: wrong key class: org.apache.hadoop.io.BytesWritable is not class org.apache.hadoop.io.NullWritable And it works fine in MR mode. Anyone met this issue before? -- Thanks, www.openkb.info<http://www.openkb.info> (Open KnowledgeBase for Hadoop/Database/OS/Network/Tool)
