[
https://issues.apache.org/jira/browse/KAFKA-19786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
HongYi Chen updated KAFKA-19786:
--------------------------------
Description:
*Problem*
When running *{{:core:compileScala}}* under {*}{{keepAliveMode=SESSION}}{*},
joint compilation adds a non-existent directory
({_}{{.../core/build/classes/java/main}}{_}) to {{{}javac{}}}’s classpath.
This triggers:
{code:java}
Unexpected javac output: warning: [path] bad path element
".../core/build/classes/java/main": no such file or directory
error: warnings found and -Werror specified {code}
The same task succeeds under {{{}keepAliveMode=DAEMON{}}}.
*Current Workaround*
Added a scoped compiler flag ({{{}-Xlint:-path{}}}) only under
{{keepAliveMode=SESSION}} to suppress the {{[path]}} warning and allow the
build to succeed.
*Steps to Reproduce*
{code:java}
./gradlew clean :core:compileScala -PkeepAliveMode=session # fails before
workaround
./gradlew clean :core:compileScala -PkeepAliveMode=daemon # succeeds {code}
*Goal of This Ticket*
Identify why SESSION-mode joint compilation includes the missing
{{classes/java/main}} entry in {{{}javac{}}}’s classpath, align its behavior
with DAEMON mode, and remove the temporary suppression once the classpath is
corrected.
was:
*Problem*
When running `{{{}:core:compileScala{}}}` under
{{{}`keepAliveMode=SESSION`{}}}, joint compilation adds a non-existent
directory ({{{}.../core/build/classes/java/main{}}}) to {{{}javac{}}}’s
classpath.
This triggers:
```
Unexpected javac output: warning: [path] bad path element
".../core/build/classes/java/main": no such file or directory
error: warnings found and -Werror specified
```
The same task succeeds under `{{{}keepAliveMode=DAEMON`{}}}.
*Current Workaround*
Added a scoped compiler flag `({{{}-Xlint:-path{}}})` only under
`{{{}keepAliveMode=SESSION`{}}} to suppress the {{[path]}} warning and allow
the build to succeed.
*Steps to Reproduce*
```
./gradlew clean :core:compileScala -PkeepAliveMode=session # fails before
workaround
./gradlew clean :core:compileScala -PkeepAliveMode=daemon # succeeds
```
*Goal of This Ticket*
Identify why SESSION-mode joint compilation includes the missing
{{classes/java/main}} entry in {{{}javac{}}}’s classpath, align its behavior
with DAEMON mode, and remove the temporary suppression once the classpath is
corrected.
> Session mode compileScala reports missing classes java main directory
> ---------------------------------------------------------------------
>
> Key: KAFKA-19786
> URL: https://issues.apache.org/jira/browse/KAFKA-19786
> Project: Kafka
> Issue Type: Bug
> Components: build
> Affects Versions: 4.1.0
> Reporter: HongYi Chen
> Assignee: HongYi Chen
> Priority: Minor
>
> *Problem*
> When running *{{:core:compileScala}}* under {*}{{keepAliveMode=SESSION}}{*},
> joint compilation adds a non-existent directory
> ({_}{{.../core/build/classes/java/main}}{_}) to {{{}javac{}}}’s classpath.
> This triggers:
> {code:java}
> Unexpected javac output: warning: [path] bad path element
> ".../core/build/classes/java/main": no such file or directory
> error: warnings found and -Werror specified {code}
> The same task succeeds under {{{}keepAliveMode=DAEMON{}}}.
> *Current Workaround*
> Added a scoped compiler flag ({{{}-Xlint:-path{}}}) only under
> {{keepAliveMode=SESSION}} to suppress the {{[path]}} warning and allow the
> build to succeed.
> *Steps to Reproduce*
> {code:java}
> ./gradlew clean :core:compileScala -PkeepAliveMode=session # fails before
> workaround
> ./gradlew clean :core:compileScala -PkeepAliveMode=daemon # succeeds
> {code}
> *Goal of This Ticket*
> Identify why SESSION-mode joint compilation includes the missing
> {{classes/java/main}} entry in {{{}javac{}}}’s classpath, align its behavior
> with DAEMON mode, and remove the temporary suppression once the classpath is
> corrected.
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