AEM – Thread Dumps Analysis
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-== & ==-
REFERENCE LINKS:
SYNOPSIS:
- A customized powershell script to download/generate the thread dumps
- Using fastthread to analyse the dumps
- Using fastthread API to get the response in JSON format
- Extracting the thread dump report URL from the JSON and access the report
- Use the Thread Dump Collection & Analysis tool [jstack] to take thread dumps from a running CQ instance for troubleshooting the following:
- Performance
- Lock contention.
- Dead lock
- other thread-related issues
ASSUMPTION:
- Assuming that service name is AEM
- cURL is already installed and configured on windows
- Has Administrator access
- Already have API access to fastthread, if not register at FastThread API
GUIDE:
- Powershell Script to generate thread dumps, upload to fastthread using cURL or API endpoint, and get JSON response.
- Following is the report generated on Fast Thread
# stopping the job if it encounters error
$ErrorActionPreference = 'Stop'
$WarningPreference = 'SilentlyContinue'
# Parameters
$AEMSRC = (get-wmiobject win32_service | ?{$_.Name -eq 'AEM'})
$AEMPID = $AEMSRC.ProcessID
$CURLEXE = "C:toolscurl76bincurl.exe"
$FILENAME = "tdaem64.txt"
# Generating ThreadDumps
cmd.exe /c "jstack -l $AEMPID > $FILENAME"
# Fastthread API
$REPURL = "http://api.fastthread.io/fastthread-api?apiKey={xxxx-xxxx-xxxx-xxxxxx-xxxxxxxxxx}"
# ThreadDumps output file
$DATA = "@$FILENAME"
# Generating threaddumps Report in JSON format
$REPDATA = cmd.exe /c "curl -X POST --data-binary @./$FILENAME $REPURL --header Content-Type:text" | ConvertFrom-Json
# Extracting the ThreadDump report URL from JSON output
$REPORTURL = $REPDATA.graphURL
# Email the Report URL
Write-Host "Emailing the ThreadDump Report"
Send-MailMessage -SmtpServer smtp.gmail.com `
-Port 587 `
-Credential $cred `
-UseSsl `
-From '[email protected]' `
-To '[email protected]' `
-Subject "ThreadDump Report" `
-Body "The ThreadDump Report can be viewed at $REPORTURL"
Write-Host "Email Sent."
# Clean Up
Remove-Item -Path $FILENAME
# Open the ThreadDump Report in Chrome Browser
Start-Process "chrome.exe" $REPORTURL
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