Failed to start solr 7.5 - solr

Question

I have installed solr 7.5 using powershell script.
This script is able to install the solr but not able to start.solr is installing but in the start step it fails.
I have tried manually to start the service also it throws error. (unable to start solr. please contact your administrator)
i'm using java version 201 (note also i checked with 212).
I have added the script that I have used.
Param(
$solrVersion = "7.5.0",
$installFolder = "E:\solr\solr-7.5.0",
$solrPort = "8986",
$solrHost = "solr",
$solrSSL = $true,
$nssmVersion = "2.24",
$JREVersion = "1.8.0_201"
)
$JREPath = "C:\Program Files (x86)\Java\jre$JREVersion" ## Note that if you're running 32bit java, you will need to change this path
$solrName = "solr-$solrVersion"
$solrRoot = "$installFolder\$solrName"
$nssmRoot = "$installFolder\nssm-$nssmVersion"
$solrPackage = "https://archive.apache.org/dist/lucene/solr/$solrVersion/$solrName.zip"
$nssmPackage = "https://nssm.cc/release/nssm-$nssmVersion.zip"
$downloadFolder = "~\Downloads"
## Verify elevated
## https://superuser.com/questions/749243/detect-if-powershell-is-running-as-administrator
$elevated = [bool](([System.Security.Principal.WindowsIdentity]::GetCurrent()).groups -match "S-1-5-32-544")
if($elevated -eq $false)
{
throw "In order to install services, please run this script elevated."
}
function downloadAndUnzipIfRequired
{
Param(
[string]$toolName,
[string]$toolFolder,
[string]$toolZip,
[string]$toolSourceFile,
[string]$installRoot
)
if(!(Test-Path -Path $toolFolder))
{
if(!(Test-Path -Path $toolZip))
{
Write-Host "Downloading $toolName..."
Start-BitsTransfer -Source $toolSourceFile -Destination $toolZip
}
Write-Host "Extracting $toolName to $toolFolder..."
Expand-Archive $toolZip -DestinationPath $installRoot
}
}
# download & extract the solr archive to the right folder
$solrZip = "$downloadFolder\$solrName.zip"
downloadAndUnzipIfRequired "Solr" $solrRoot $solrZip $solrPackage $installFolder
# download & extract the nssm archive to the right folder
$nssmZip = "$downloadFolder\nssm-$nssmVersion.zip"
downloadAndUnzipIfRequired "NSSM" $nssmRoot $nssmZip $nssmPackage $installFolder
# Ensure Java environment variable
$jreVal = [Environment]::GetEnvironmentVariable("JAVA_HOME", [EnvironmentVariableTarget]::Machine)
if($jreVal -ne $JREPath)
{
Write-Host "Setting JAVA_HOME environment variable"
[Environment]::SetEnvironmentVariable("JAVA_HOME", $JREPath, [EnvironmentVariableTarget]::Machine)
}
# if we're using HTTP
if($solrSSL -eq $false)
{
# Update solr cfg to use right host name
if(!(Test-Path -Path "$solrRoot\bin\solr.in.cmd.old"))
{
Write-Host "Rewriting solr config"
$cfg = Get-Content "$solrRoot\bin\solr.in.cmd"
Rename-Item "$solrRoot\bin\solr.in.cmd" "$solrRoot\bin\solr.in.cmd.old"
$newCfg = $newCfg | % { $_ -replace "REM set SOLR_HOST=192.168.1.1", "set SOLR_HOST=$solrHost" }
$newCfg | Set-Content "$solrRoot\bin\solr.in.cmd"
}
}
# Ensure the solr host name is in your hosts file
if($solrHost -ne "localhost")
{
$hostFileName = "c:\\windows\system32\drivers\etc\hosts"
$hostFile = [System.Io.File]::ReadAllText($hostFileName)
if(!($hostFile -like "*$solrHost*"))
{
Write-Host "Updating host file"
"`r`n127.0.0.1`t$solrHost" | Add-Content $hostFileName
}
}
# if we're using HTTPS
if($solrSSL -eq $true)
{
# Generate SSL cert
$existingCert = Get-ChildItem Cert:\LocalMachine\Root | where FriendlyName -eq "$solrName"
if(!($existingCert))
{
Write-Host "Creating & trusting an new SSL Cert for $solrHost"
# Generate a cert
# https://learn.microsoft.com/en-us/powershell/module/pkiclient/new-selfsignedcertificate?view=win10-ps
$cert = New-SelfSignedCertificate -FriendlyName "$solrName" -DnsName "$solrHost" -CertStoreLocation "cert:\LocalMachine" -NotAfter (Get-Date).AddYears(10)
# Trust the cert
# https://stackoverflow.com/questions/8815145/how-to-trust-a-certificate-in-windows-powershell
$store = New-Object System.Security.Cryptography.X509Certificates.X509Store "Root","LocalMachine"
$store.Open("ReadWrite")
$store.Add($cert)
$store.Close()
# remove the untrusted copy of the cert
$cert | Remove-Item
}
# export the cert to pfx using solr's default password
if(!(Test-Path -Path "$solrRoot\server\etc\solr-ssl.keystore.pfx"))
{
Write-Host "Exporting cert for Solr to use"
$cert = Get-ChildItem Cert:\LocalMachine\Root | where FriendlyName -eq "$solrName"
$certStore = "$solrRoot\server\etc\solr-ssl.keystore.pfx"
$certPwd = ConvertTo-SecureString -String "secret" -Force -AsPlainText
$cert | Export-PfxCertificate -FilePath $certStore -Password $certpwd | Out-Null
}
# Update solr cfg to use keystore & right host name
if(!(Test-Path -Path "$solrRoot\bin\solr.in.cmd.old"))
{
Write-Host "Rewriting solr config"
$cfg = Get-Content "$solrRoot\bin\solr.in.cmd"
Rename-Item "$solrRoot\bin\solr.in.cmd" "$solrRoot\bin\solr.in.cmd.old"
$newCfg = $cfg | % { $_ -replace "REM set SOLR_SSL_KEY_STORE=etc/solr-ssl.keystore.jks", "set SOLR_SSL_KEY_STORE=$certStore" }
$newCfg = $newCfg | % { $_ -replace "REM set SOLR_SSL_KEY_STORE_PASSWORD=secret", "set SOLR_SSL_KEY_STORE_PASSWORD=secret" }
$newCfg = $newCfg | % { $_ -replace "REM set SOLR_SSL_TRUST_STORE=etc/solr-ssl.keystore.jks", "set SOLR_SSL_TRUST_STORE=$certStore" }
$newCfg = $newCfg | % { $_ -replace "REM set SOLR_SSL_TRUST_STORE_PASSWORD=secret", "set SOLR_SSL_TRUST_STORE_PASSWORD=secret" }
$newCfg = $newCfg | % { $_ -replace "REM set SOLR_HOST=192.168.1.1", "set SOLR_HOST=$solrHost" }
$newCfg | Set-Content "$solrRoot\bin\solr.in.cmd"
}
}
# install the service & runs
$svc = Get-Service "$solrName" -ErrorAction SilentlyContinue
if(!($svc))
{
Write-Host "Installing Solr service"
&"$installFolder\nssm-$nssmVersion\win64\nssm.exe" install "$solrName" "$solrRoot\bin\solr.cmd" "-f" "-p $solrPort"
$svc = Get-Service "$solrName" -ErrorAction SilentlyContinue
}
if($svc.Status -ne "Running")
{
Write-Host "Starting Solr service"
Start-Service "$solrName"
}
# finally prove it's all working
$protocol = "http"
if($solrSSL -eq $true)
{
$protocol = "https"
}
Invoke-Expression "start $($protocol)://$($solrHost):$solrPort/solr/#/"
Please find the screenshot

Answer 1

Set JAVA_HOME environment variable and try to start Solr manualy .

Answer 2

Need to verify the
Set the JAVA_Home environment variable or not.
Check JRE Path in the script file (jre$JREVersion", jre-$JREVersion").