Eugene Koifman created HIVE-18429: ------------------------------------- Summary: Compaction should handle a case when it produces no output Key: HIVE-18429 URL: https://issues.apache.org/jira/browse/HIVE-18429 Project: Hive Issue Type: Bug Components: Transactions Affects Versions: 1.0.0 Reporter: Eugene Koifman Assignee: Eugene Koifman
Suppose we start with empty delta_8_8 and delta_9_9 and compaction runs. It will currently produce an MR job with 0 splits and so {{CompactorMR.TMP_LOCATION}} never gets created. This causes {{CompactorOutputCommitted.commitJob()}} to fail when it tries to do {{FileStatus[] contents = fs.listStatus(tmpLocation);}} since tmpLocation doesn't exist. If compactor fails to produce delta_8_9 here it will fail to do further compaction unless new delta with data is created. If the number of empty deltas is > than HiveConf.ConfVars.COMPACTOR_MAX_NUM_DELTA, compaction will not be able to proceed at all. It should produce a delta_8_9 in this case even if it's empty. -- This message was sent by Atlassian JIRA (v6.4.14#64029)