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1. WHAT IS WINUTILS HOW TO
2. WHAT IS WINUTILS FULL
3. WHAT IS WINUTILS CODE
4. WHAT IS WINUTILS SERIES
5. WHAT IS WINUTILS WINDOWS

WHAT IS WINUTILS CODE

So having cloned/downloaded the Apache Hadoop repo and checked out to the ‘branch-3.2’, the desired WinUtils code can be found within our local repo at I’ll be using the ‘branch-3.2’ branch for this exercise. For our purposes we can focus on just the WinUtils code itself. Note the specific components required based on the code base.

WHAT IS WINUTILS HOW TO

You can find a number of tutorials on how to do this on the web, such as the one found here.

WHAT IS WINUTILS FULL

You’ll need a very specific set of dependent components and a dedicated build machine if you want to build the full Hadoop repo, which is the approach taken in the above prebuilt repos.

WHAT IS WINUTILS WINDOWS

Getting the whole Hadoop code base to build on a Windows machine is no easy task, and we won’t be trying this here. As you can see from the repo, the Hadoop code base is huge, but the elements we really need are only a small fraction of this. WinUtils is included within the main Apache Spark GitHub repository, with all dependent source code available for inspection as required. We all know the perils of simply downloading and running opaque executables and so the option to build your own winutils executable for Spark will be welcome. The security administrators and custodians of your systems will quite probably have tight controls on you simply copying files whose originating source code cannot be verified 100%, for obvious reasons. This may however still not be acceptable from a security perspective. The maintainer of the second compiled WinUtils repo above details the process that they go to in order to ensure that the code is compiled from the legitimate source, with no routes for malware to infiltrate. If you don’t need to provide transparency of the source of the code used you can always simply grab the compiled files for local use rather than going to the trouble of compiling your own. There are GitHub repositories that are independently maintained, available here, with a previous one here (no longer maintained) that contains the compiled exe file and any supporting libraries, for the various versions of the Hadoop code base included within Apache Spark. Why Build Your Own? Existing Prebuilt WinUtils Repositories So if you’re on Windows and want to run Spark, WinUtils is a necessity to get going with anything involving the Hive metastore. You’ll need to use WinUtils as below in order to set the POSIX permissions for HDFS that the Hive metastore will be happy with. You’ll get an error complaining about lack of writable access to the above scratch directory and Spark will throw a full blown sulk like a kid deprived of their Nintendo Switch. In order to set these POSIX permissions you need to use WinUtils, and without these permissions being set correctly any attempt to use Spark SQL to access the Hive metastore will fail. Spark requires that you have set POSIX compatible permissions for a temporary directory used by the Hive metastore, which defaults to C:\tmp\hive (the location of this can be changed as described here ). If Spark cannot find the required service executable, WinUtils.exe, it will throw a warning as below, but will proceed to try and run the Spark shell. This allows management of the POSIX file system permissions that the HDFS file system requires of the local file system. In order to run Apache Spark locally, it is required to use an element of the Hadoop code base known as ‘WinUtils’. It is intended for an audience unfamiliar with building C++ projects, and as such seasoned C++ developers will no doubt want to skip some of the ‘hand-holding’ steps.

WHAT IS WINUTILS SERIES

This post serves to supplement the main thread of the series on Development on Databricks, making a stop at C++ world (don’t panic!) as we handle the situation where you are required to build your own WinUtils executable for use with Spark. For this to happen however, you’ll need to have an executable file called winutils.exe. The option of setting up a local spark environment on a Windows build, whether for developing spark applications, running CI/CD activities or whatever, brings many benefits for productivity and cost reduction. No submissions about memes, jokes, meta, or hypothetical / dream builds.This entry is part 3 of 5 in the series Development on Databricks.No submission titles that are all-caps, clickbait, PSAs, or pro-tips.No submissions about retailer or customer service experiences.No submissions about sales, deals or unauthorized giveaways.No submissions about hardware news, rumors, or reviews.Please keep in mind that we are here to help you build a computer, not to build it for you. Submit Build Help/Ready post Submit Troubleshooting post Submit other post New Here? BuildAPC Beginner's Guide Live Chat on Discord Daily Simple Questions threads