JavaToolInstaller task cannot get JDK file from network share

[sdobrodeev]

Question, Bug, or Feature?
Type: Bug

Enter Task Name: JavaToolInstaller task cannot get JDK file from network share

Environment

• Server - Azure Pipelines
• Agent - Private: (Windows, 2.153.1 )

Issue description (Steps to reproduce:)
Create and run pipelne containing JavaToolInstaller task call using network path as jdkFile parameter value:
For example:

- task: JavaToolInstaller@0
  inputs:
    versionSpec: '8'
    jdkArchitectureOption: 'x64'
    jdkSourceOption: 'LocalDirectory'
    jdkFile: \\$(fileShareServer)\ToolInstallationsForAzureDevOps
    jdkDestinationDirectory: '$(Build.ArtifactStagingDirectory)\java'
    cleanDestinationDirectory: false

Expected:
Java is installed from the archive located on the remote server

Actual:
We get the following error

Retrieving the JDK from local path.
Creating destination folder: C:\java
##[error]UNKNOWN: unknown error, stat '\\server\server-jre-8u231-windows-x64.tar.gz'
##[error]UNKNOWN: unknown error, stat '\\server\server-jre-8u231-windows-x64.tar.gz'
##[section]Finishing: JavaToolInstaller