You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@pig.apache.org by "Yigitbasi, Nezih" <ne...@intel.com> on 2013/12/10 21:27:32 UTC

problem with temp file deletion in MAPREDUCE operator

Hi all,
When I run a native MR job with the MAPREDUCE keyword and store the intermediate data in HBase with:
    stored = MAPREDUCE 'my.jar'
              STORE x INTO 'hbase://temp_table'
              USING org.apache.pig.backend.hadoop.hbase.HBaseStorage('hbase_schema')
              .... and the rest ....;

Pig tries to delete the temp files, which in this case has an HBase path, and fails with the exception:

Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:hbase:/temp_table
        at org.apache.hadoop.fs.Path.initialize(Path.java:148)
        at org.apache.hadoop.fs.Path.<init>(Path.java:126)
        at org.apache.pig.backend.hadoop.datastorage.HDataStorage.isContainer(HDataStorage.java:197)
        at org.apache.pig.backend.hadoop.datastorage.HDataStorage.asElement(HDataStorage.java:128)
        at org.apache.pig.impl.io.FileLocalizer.delete(FileLocalizer.java:415)
        at org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MapReduceLauncher.launchPig(MapReduceLauncher.java:419)
        at org.apache.pig.PigServer.launchPlan(PigServer.java:1322)

The reason is that in the FileLocalizer class I see that hbase tables are not handled properly; in fact the given file spec is only checked against LOCAL_PREFIX ("file:") and if it's not a local file then HDFS is used as the file system.  Anyway, I created an issue for this (PIG-3617<https://issues.apache.org/jira/browse/PIG-3617>) and will be happy to help you guys implement the fix.

Thanks,
Nezih