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Java 27 and 26: runnable demos and captured output for every JEP, plus version lanes

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Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01B38FGKKam5SCGgwgduVAh3
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asmhatre
2026-09-21 15:08:50 +00:00
committed by Claude
co-authored by Claude Sonnet 5
commit f59c1de96d
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docs/output/40-jfr-redaction.txt
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# The process under test: java -Dapi.token=abc123 -Dregion=ap-south-1 ... Idle --password=hunter2 --user=ankur
# with DB_PASSWORD=hunter2 in the environment. Which of those values reach the recording?
=== jdk26-default
jvmArguments = "-Dapi.token=abc123 -Dregion=ap-south-1 -XX:StartFlightRecording:filename=<file>"
javaArguments = "Idle --password=hunter2 --user=ankur"
key = "region" value = "ap-south-1"
key = "api.token" value = "abc123"
key = "DB_PASSWORD" value = "hunter2"
=== jdk27-default
jvmArguments = "[REDACTED] -Dregion=ap-south-1 -XX:StartFlightRecording:filename=<file>"
javaArguments = "Idle [REDACTED] --user=ankur"
key = "region" value = "ap-south-1"
key = "api.token" value = "[REDACTED]"
key = "DB_PASSWORD" value = "[REDACTED]"
=== jdk27-own-list-replaces-defaults
-XX:FlightRecorderOptions:redact-argument=--user*,redact-key=region
jvmArguments = "-Dapi.token=abc123 -Dregion=[REDACTED] -XX:FlightRecorderOptions:redact-argument=[REDACTED],redact-key=region -XX:StartFlightRecording:filename=<file>"
javaArguments = "Idle --password=hunter2 [REDACTED]"
key = "region" value = "[REDACTED]"
key = "api.token" value = "abc123"
key = "DB_PASSWORD" value = "hunter2"
=== jdk27-plus-extends-defaults
-XX:FlightRecorderOptions:redact-argument=+--user*,redact-key=+region
jvmArguments = "[REDACTED] -Dregion=[REDACTED] -XX:FlightRecorderOptions:redact-argument=[REDACTED],redact-key=+region -XX:StartFlightRecording:filename=<file>"
javaArguments = "Idle [REDACTED] [REDACTED]"
key = "region" value = "[REDACTED]"
key = "api.token" value = "[REDACTED]"
key = "DB_PASSWORD" value = "[REDACTED]"
=== jdk27-none-disables-redaction
-XX:FlightRecorderOptions:redact-argument=none,redact-key=none
jvmArguments = "-Dapi.token=abc123 -Dregion=ap-south-1 -XX:FlightRecorderOptions:redact-argument=[REDACTED],redact-key=none -XX:StartFlightRecording:filename=<file>"
javaArguments = "Idle --password=hunter2 --user=ankur"
key = "region" value = "ap-south-1"
key = "api.token" value = "abc123"
key = "DB_PASSWORD" value = "hunter2"