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From "Chaoyu Tang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13509) HCatalog getSplits should ignore the partition with invalid path
Date Wed, 13 Apr 2016 22:28:25 GMT
Chaoyu Tang created HIVE-13509:
----------------------------------

             Summary: HCatalog getSplits should ignore the partition with invalid path
                 Key: HIVE-13509
                 URL: https://issues.apache.org/jira/browse/HIVE-13509
             Project: Hive
          Issue Type: Improvement
          Components: HCatalog
            Reporter: Chaoyu Tang
            Assignee: Chaoyu Tang


It is quite common that there is the discrepancy between partition directory and its HMS metadata,
simply because the directory could be added/deleted externally using hdfs shell command. Technically
it should be fixed by MSCK and alter table .. add/drop command etc, but sometimes it might
not be practical especially in a multi-tenant env. This discrepancy does not cause any problem
to Hive, Hive returns no rows for a partition with an invalid (e.g. non-existing) path, but
it fails the Pig load with HCatLoader, because the HCatBaseInputFormat getSplits throws an
error when getting a split for a non-existing path. The error message might looks like:
{code}
Caused by: org.apache.hadoop.mapred.InvalidInputException: Input path does not exist: hdfs://xyz.com:8020/user/hive/warehouse/xyz/date=2016-01-01/country=BR
	at org.apache.hadoop.mapred.FileInputFormat.singleThreadedListStatus(FileInputFormat.java:287)
	at org.apache.hadoop.mapred.FileInputFormat.listStatus(FileInputFormat.java:229)
	at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:315)
	at org.apache.hive.hcatalog.mapreduce.HCatBaseInputFormat.getSplits(HCatBaseInputFormat.java:162)
	at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigInputFormat.getSplits(PigInputFormat.java:274)
{code}



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