andrewmusselman commented on issue #394:
URL: https://github.com/apache/mahout/pull/394#issuecomment-618420944
Getting an error from rat about files without license headers, looks like
it's about the Spark `metastore_db`. Can we remove that directory from the
source tree?
```
[ERROR] Failed to execute goal org.apache.rat:apache-rat-plugin:0.13:check
(default) on project mahout: Too many files with unapproved license: 2 See RAT
report in: /home/akm/a/src/mahout/target/rat.txt -> [Help 1]
```
From rat.txt:
```*****************************************************
Printing headers for text files without a valid license header...
=====================================================
== File: metastore_db/seg0/README_DO_NOT_TOUCH_FILES.txt
=====================================================
# *************************************************************************
# *** DO NOT TOUCH FILES IN THIS DIRECTORY! ***
# *** FILES IN THIS DIRECTORY ARE USED BY THE DERBY DATABASE TO STORE ***
# *** USER AND SYSTEM DATA. EDITING, ADDING, OR DELETING FILES IN THIS ***
# *** DIRECTORY WILL CORRUPT THE ASSOCIATED DERBY DATABASE AND MAKE ***
# *** IT NON-RECOVERABLE. ***
# *************************************************************************
=====================================================
== File: metastore_db/log/README_DO_NOT_TOUCH_FILES.txt
=====================================================
# *************************************************************************
# *** DO NOT TOUCH FILES IN THIS DIRECTORY! ***
# *** FILES IN THIS DIRECTORY ARE USED BY THE DERBY DATABASE RECOVERY ***
# *** SYSTEM. EDITING, ADDING, OR DELETING FILES IN THIS DIRECTORY ***
# *** WILL CAUSE THE DERBY RECOVERY SYSTEM TO FAIL, LEADING TO ***
# *** NON-RECOVERABLE CORRUPT DATABASES. ***
# *************************************************************************
```
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