Suhas Vasu created FALCON-912:
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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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