#WINUTILS EXE HADOOP S INSTALL#
#WINUTILS EXE HADOOP S SOFTWARE#

But if it is missing, the log messages complain about its absence. Problem #5 is that most of the time, such as when accessing straight up HDFS and YARN, one does not need winutils.exe. Because of this, fixing problems of finding the wrong winutils.exe are extremely difficult. Which leads to problem #4: There is no logging that says where winutils.exe was actually found and loaded. However, the documentation, such as it is, makes no mention of this, and instead says that you should set the HADOOP_HOME environment variable, which does NOT override the winutils.exe found in your system PATH. If it is in the PATH, that is where it is found.

#WINUTILS EXE HADOOP S SOFTWARE#

Problem #3 is that the mechanism by which you inform the Hadoop client software where to find winutils.exe is poorly documented and fragile. This makes creating and maintaining test environments that work with all of the Hadoop distros we want to test unnecessarily tedious and error-prone.

In particular, MapR MUST have its winutils.exe in the system path, but doing so breaks the Hadoop distro for every other Hadoop vendor. Which leads to problem #2: winutils.exe are not always compatible.

#WINUTILS EXE HADOOP S INSTALL#

Thus, as software developers, we are forced to pick one version and distribute and install it with our software. Problem #1 with winutils.exe is that it is simply missing from many popular distros and/or the client-side software installation for said distros, when supplied, fails to install winutils.exe. My team creates software that runs on Windows and Linux, and winutils.exe is probably responsible for 20% of all issues we encounter, both during development and in the field. Unfortunately, like many stopgap measures in software, this one has persisted well beyond its expected lifetime and usefulness. Rather than building a DLL that makes native OS calls, the creators of winutils.exe must have decided that it would be more expedient to create an EXE to carry out file system operations in a linux-like fashion. Winutils.exe was apparently created as a stopgap measure to allow Hadoop to 'work' on Windows platforms, because the NativeIO libraries aren't implemented there (edit: even NativeIO probably doesn't cover the operations that winutils.exe is used for).

Winutils Exe Hadoop S