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05-24-2019
10:00 AM
I'm running RHEL and ran into similar problems due to the fun configuration of Python2 and 3 and SCL on RedHat. The root cause is the /usr/bin/hdp-select script was written to be Python2 compatible. The differences between Python2 and 3 are causing these issues, the script is unfortunately not compatible with both versions. To resolve, we had to modify the hdp-select script to be compatible with both versions. I would attach mine but it might break your environment as there is a lot of hardcoded values such as your HDP component versions. So you'll need to do these steps manually. Steps: 1. Make a backup of the file. sudo cp -p /usr/bin/hdp-select /usr/bin/hdp-select_original 2. As root, edit the file. 3. Add parenthesis around all print statements. Example below. Change all occurrences from: print "a", "b", var, 123 to: print ("a","b", var, 123) Be careful of multi-line print statements, ending with \, or using multi-line strings. Recommend editing in a text editor that supports syntax highlighting to avoid any issues. Also be aware that Python is sensitive to indentation so you don't want to change any spaces / tabs at the start of a line. 4. Change os.mkdir from: os.mkdir(current, 0755) to: os.mkdir(current, 0o755) 5. Comment out the packages.sorted() From packages.sorted() To #packages.sorted() (There are online tools for converting code from Python2 to 3 but they miss some of the above steps.) 6. Save and close the file 7. Test that hdp-select still works from shell. If so, you should be able to run spark-submit without issue. A word of caution: While these changes should be backwards compatible with Python 2, I am not sure what the longer-term impacts of these changes are, it may cause problems with other HDP components (though it seems highly unlikely). Making changes to scripts outside of Ambari has other risks - Ambari or some other installation or upgrade process might replace the script with the one from your HDP software bundle, so your spark-submit could stop working if/when that happens. I would file a bug report but we don't have Cloudera support at this time.
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