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During this presentation, I will demonstrate how to generate an automatic custom memory report integrated in a Continuous Integration. It detects memory leaks very early in development process and provides a preliminary report. The Bonitasoft team implemented such a solution with the Hudson continuous integration server and the Memory Analyzer Tool (MAT) on our Eclipse RCP application. This talk will be an opportunity to share our experience and present the steps to achieved the goal: Take a Heap Dump programmatically at the end of Test execution Create a custom MAT report or use the ones provided Launch MAT reports analysis on the Heap Dump Integrate reports analysis in the Hudson/Jenkins job
Citation preview
Take advantage of Memory
Analyzer Tool inside your
Continuous Integration
Aurélien Pupier R&D Engineer, Studio Development Leader
@apupier
©2014 Bonitasoft
Agenda
• Why using MAT?
• How to
– Programmatic Heap Dump
– Choose your report
– Headless report generation
– CI integration
• Going further
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Why using MAT?
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Before – how we detect Memory Leak? (1/3)
• Manual QA tests
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Before – how we detect Memory Leak? (2/3)
• Client
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Before – how we detect Memory Leak? (3/3)
• Dumb performance tests
– Dedicated test suite
– Open 100 diagrams
– Only very big OOM
– Check no crash
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Unit Test Integration
Test Performance
Test Manual QA
Test Client
Detect early
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It’s
complicated It’s
com
plic
ate
d
How to
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Required materials
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Programmatic Heap Dump
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Heap Dumper Java code
• Mbean
– com.sun.management:type=HotSpotDiagnostic
• JVM-specific
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When?
• All tests played and finished
– Memory should be clean
– Take care to close everything
• End of Test Suite
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When? Afterclass
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Plug-in specificity
• Extension point used
– Avoid JVM dependency
• Extract interface for HeapDumper
• Close project Eclipse compiler mic-mac
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Global picture
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MBean provider
Heap Dumper Extension point
Test suite executor
Heap Dumper Provider
Choose your report
Find your happiness… or create it
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Provided
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Custom report
• AllTests_custom_html\index.html
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Headless report generation
MAT – “There’s an app for that”
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Headless report generation
• Generate report
– org.eclipse.mat.api.parse <dumpFile> <reportId>
– Leak suspects id: org.eclipse.mat.api:suspects
• Unzip reports
– Keep <report-name>_html
– Clean folder
• *.zip
• *.index
• *.threads
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CI Integration
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Build steps – Generate report
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Build steps – Use reports
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Reports availability
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Fail the build
• Custom script parsing report
– Custom for each report
– Define your own thresholds
• Last build step
• Return value != 0
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Going further
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Possible improvements
• Provide an Hudson/Jenkins plugin for MAT
– Download
– Pre-defined list of available reports
– Pre-defined thresholds to fail the build
– Conditional Launch (only for Nightly?)
– Group reports
• MAT
– Allow to return a status code when generating report
– Handle thresholds
– Use compare feature
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©2013 Bonitasoft 28
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