Play apps with a bundled start script split JAVA_OPTS unquoted, breaking multi-word values
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- 4/5
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- 3-5 天
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- 42/100
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- 缺陷
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- 基本清楚
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- 活跃
- 领域
- cloud, devops, infrastructure
调研方向
This is the start-script launch path for Play apps (bin/<name> from sbt-native-packager), not the buildpack javaexec path used when no start script exists. Trace how JAVA_OPTS is passed into that script versus the no-start-script branch (play.core.server.NettyServer). Done means multi-word JAVA_OPTS (e.g. a quoted cron -D) survive as tokens, likely via -J<flag> as the issue suggests, without relying on unquoted ${java_opts[@]}. Related context is cloudfoundry/java-buildpack#1435.
由索引模型根据 Issue 内容生成。
描述
Play apps packaged with a start script (bin/<name>, generated by sbt-native-packager, used whenever the app ships one — staged and dist Play 2.x builds) are launched directly via that script, not via the buildpack's shell-free javaexec launcher. javaexec is only used when no start script is present.
sbt-native-packager's own script template does:
if [[ "$JAVA_OPTS" != "" ]]; then
java_opts="${JAVA_OPTS}"
fi
execRunner "$java_cmd" ${java_opts[@]} ...
${java_opts[@]} is unquoted, so $JAVA_OPTS is word-split on whitespace (and glob-expanded). A value containing embedded spaces, e.g. a quoted cron expression (-DcronExpr="0 */7 * * * *"), splits into separate bare words; a bare word like */7 with no leading - can be misread as the main class by java, causing Could not find or load main class *.7 and a crash loop.
Command substitution in the value cannot occur here (it's plain variable expansion, not re-parsed source) — this is a launch-correctness issue, pre-existing and independent of #1432/#1435's javaexec fix, which only covers the no-start-script branch (play.core.server.NettyServer invocation).
Possible fix: route the start-script branch through a safe tokenizer too, passing JAVA_OPTS tokens as -J<flag> arguments (the convention sbt-native-packager scripts already support for exactly this purpose) instead of relying on the script reading $JAVA_OPTS directly.
Found while investigating cloudfoundry/java-buildpack#1435.
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