[jira] [Created] (FALCON-912) Lineage recorder fails at createFileSystem()

["Suhas Vasu (JIRA)" <ji...@apache.org>]

Suhas Vasu created FALCON-912:
---------------------------------

             Summary: Lineage recorder fails at createFileSystem()
                 Key: FALCON-912
                 URL: https://issues.apache.org/jira/browse/FALCON-912
             Project: Falcon
          Issue Type: Bug
            Reporter: Suhas Vasu


We recently had an instance where falcon post-processing was failing at LineageRecorder.

The exact scenario was - the log retention was set to a very low period and as a result the logs directory in the staging directory for the process got deleted on hdfs as it was empty. So when the next instance ran, in the succeeded-postprocessing LineageRecorder tries creating directories on the hdfs in the staging directory for the particular process and it fails with incorrect permissions.

{noformat}
try {
            return createFileSystem(UserGroupInformation.getLoginUser(), uri, conf);
        } catch (IOException e) {
            throw new FalconException("Exception while getting FileSystem for: " + uri, e);
        }
{noformat}

The post processing runs as login user which is mapred but the owner of the staging directory is the owner specified in the feed/process.

So it should be {{UserGroupInformation.getCurrentUser()}} rather than {{UserGroupInformation.getLoginUser()}}



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