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https://issues.apache.org/jira/browse/MCOMPILER-302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16120400#comment-16120400
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Karl Heinz Marbaise commented on MCOMPILER-302:
-----------------------------------------------
After taken a deeper look into that...I think I can explain the problem..
The issue is based on the generation of two command line option sets in the
case for JDK 7 which looks in debug output like this:
{code}
[DEBUG]
/Users/kama/.m2/repository/commons-httpclient/commons-httpclient/2.0.2/commons-httpclient-2.0.2.jar
[DEBUG] /Users/kama/.m2/repository/log4j/log4j/1.2.17/log4j-1.2.17.jar
[DEBUG] Source roots:
[DEBUG] /Users/kama/ws-git-maven-bugs/failingCompile/src/main/java
[DEBUG]
/Users/kama/ws-git-maven-bugs/failingCompile/target/generated-sources/annotations
[DEBUG] Command line options:
[DEBUG] -d /Users/kama/ws-git-maven-bugs/failingCompile/target/classes
-classpath .....
[DEBUG] -d /Users/kama/ws-git-maven-bugs/failingCompile/target/classes
-classpath .....
[DEBUG] incrementalBuildHelper#beforeRebuildExecution
[INFO] Compiling 1 source file to
/Users/kama/ws-git-maven-bugs/failingCompile/target/classes
[DEBUG] incrementalBuildHelper#afterRebuildExecution
[INFO]
[INFO] --- maven-resources-pl
{code}
which in the end causes an error of javac on command line:
{code}
javac: no source files
Usage: javac <options> <source files>
use -help for a list of possible options
{code}
The first thing is that shouldn't happen and of course the failure output of
javac should somehow catched up and produce a useful error message for the
user...and being silently ignored...
Using JDK 8 there is exactly a single line of command line options being
generated...
But the most important question is: Why does it produce two command line
options sets in JDK 7 whereas in JDK 8 it does not...
> Project doesn't compile with jdk7 (does with jdk8)
> --------------------------------------------------
>
> Key: MCOMPILER-302
> URL: https://issues.apache.org/jira/browse/MCOMPILER-302
> Project: Maven Compiler Plugin
> Issue Type: Bug
> Affects Versions: 3.6.2
> Environment: Windows 7
> Reporter: Sander Theetaert
> Labels: maven
> Attachments: failingCompile.zip
>
>
> When building attached project there are no .class files generated in the
> target/classes
> folder,
> this is a trimmed down example project but we do face this issue and can't
> use jdk8 for other reasons.
> At least a workaround would be nice...
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