solr-init Image Should Be Updated for Usage with Solr 8.8.2

[Antonytm]

solr-init container doesn't initialize Solr cores

• I have tried with the latest version of Docker for Windows (Stable or Edge) or Docker Enterprise.
• Windows version is at least 1809 / ltsc2019.
• Windows has the latest updates installed.

Expected behavior

sitecore-xp0-solr-init 10.2.0-ltsc2019 (sitecore-xm1-solr-init as well) should initialize Solr cores.

Actual behavior

sitecore-xp0-solr-init 10.2.0-ltsc2019 doesn't initialize Solr cores.
And throw exception to logs:

Downloading '_default' SOLR config set

Downloading '' file

C:\Download-SolrConfig.ps1 : Exception calling "WriteAllLines" with "2" 

argument(s): "Value cannot be null.

Parameter name: contents"

At C:\Start.ps1:68 char:1

+ .\Download-SolrConfig.ps1 -SolrEndpoint $SolrEndpoint -OutPath $solrB ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : NotSpecified: (:) [Download-SolrConfig.ps1], Met 

   hodInvocationException

    + FullyQualifiedErrorId : ArgumentNullException,Download-SolrConfig.ps1

Additional information

Tested on
10.2.0-ltsc2019 | 10.0.17763.2452 | ltsc2019 | amd64 | windows | sha256:4428959a3f23e959aa5e99441116816f4644656d3036a54c2c51f36226b4953c | 11/04/2021 08:34:49 | 01/19/2022 15:14:35|

Initially, I opened an issue in https://github.com/Sitecore/docker-examples repository.
Sitecore/docker-examples#46

But after digging, I figured out that Solr ZooKeeper response was changed from 8.4.0 to 8.8.2 version. It causes requests from solr-init to solr container fail because another format of data is expected.

That is why I duplicate an issue here.

Steps to reproduce the behavior

1. Clone https://github.com/Sitecore/docker-examples
2. Switch to master branch
3. Initialize environment .\init.ps1 -LicenseXmlFile c:\license\license.xml
4. cd custom-images\docker
5. Run .\clean.ps1 to make sure that there are no artifacts from previous times
6. cd custom-images
7. run docker-compose up -d

Suggested fix

Change Download-SolrConfig.ps1 file, update Download-FileItem function:

function Download-FileItem {
    param(
        [string]$SolrEndpoint,
        $FileItem,
        [string]$OutPath
    )
    Write-Host "Downloading '$($FileItem.title)' file"
    $fileContent = (Invoke-RestMethod -Uri "$SolrEndpoint/$($FileItem.attr.href)" -Credential (Get-SolrCredential)).znode.data
    #File content should have "UTF-8 without BOM" encoding
    [System.IO.File]::WriteAllLines("$OutPath\$($FileItem.title)", $fileContent)
}

[andersdreyer]

@Antonytm Any updates on this? Did you solve it temporarily or just waiting for an official fix?