Looks like I was able to isolate the problem: *[INFO] configuring report plugin org.apache.maven.plugins:maven-surefire-report-plugin:2.19.1*
*[INFO] preparing 'report' report requires '[surefire]test' forked phase execution* [INFO] [INFO] >>> maven-surefire-report-plugin:2.19.1:report > [surefire]test @ PROJECT >>> [INFO] [INFO] --- xmlbeans-maven-plugin:2.3.3:xmlbeans (default) @ PROJECT --- [INFO] All schema objects are up to date. [INFO] [INFO] --- maven-resources-plugin:2.7:resources (default-resources) @ PROJECT --- [INFO] Using 'utf-8' encoding to copy filtered resources. [INFO] Copying 7 resources [INFO] Copying 103 resources [INFO] Copying 103 resources [INFO] [INFO] --- jrebel-maven-plugin:1.1.5:generate (generate-rebel-xml) @ PROJECT --- [INFO] Processing PROJECT with packaging jar [INFO] [INFO] --- maven-compiler-plugin:3.5.1:compile (default-compile) @ PROJECT --- [INFO] Changes detected - recompiling the module! [INFO] Compiling 77 source files to ... [INFO] ---* jacoco-maven-plugin:0.7.6.201602180812:instrument (offline-instrument) @ PROJECT* --- [INFO] [INFO] --- maven-resources-plugin:2.7:testResources (default-testResources) @ PROJECT --- [INFO] Using 'utf-8' encoding to copy filtered resources. [INFO] Copying 3 resources [INFO] [INFO] --- maven-compiler-plugin:3.5.1:testCompile (default-testCompile) @ PROJECT --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] --- maven-surefire-plugin:2.19.1:test (default-test) @ PROJECT --- [INFO] *Skipping execution of surefire because it has already been run for this configuration* [INFO] [INFO] <<< maven-surefire-report-plugin:2.19.1:report < [surefire]test @ PROJECT <<< So, surefire-reports reruns surefire:test with all the preparation steps. Whereas surefire:test detects that it was already ran, jacoco:instrument does realize that it was already executed. And as the post-processing steps do not get executed, restore-instrumented-classes is not invoked a second time. Therefore - after the surefire-report to surefire call - the classes contain instrumentation data, which then tricks the jacoco report generation that the Maven Site Plugin performs. I moved the restore-instrumented-classes invocation from its default phase to the test phase and this solved the problem. But I assume that this won't work for users that also use the Failsafe plugins together with Surefire. So, a real solution IMHO can only be that the jacoco:instrument implementation detects that it was already executed once, similar to what surefire:test does. Florian 2016-04-19 18:51 GMT+02:00 Mirko Friedenhagen <mfriedenha...@gmail.com>: > Hello Florian, > > did you put the reporting section into the profile as well? This should > just work AFAIK. > > Regards > Mirko > -- > Sent from my mobile > Am 19.04.2016 13:42 schrieb <fwies...@gmail.com>: > >> Hi, >> >> In our project we use offline instrumentation as we are doing AspectJ >> compile-time weaving. The report generated by the Maven report goal is >> accurate (although we use PowerMockito), but it is currently generated from >> the Maven default lifecycle, not the site lifecycle: >> <profile> >> <id>jacoco-coverage</id> >> <build> >> <plugins> >> <plugin> >> <groupId>org.jacoco</groupId> >> <artifactId>jacoco-maven-plugin</artifactId> >> <configuration> >> <excludes> >> <!-- our excludes --> >> </excludes> >> </configuration> >> <executions> >> <execution> >> <id>offline-instrument</id> >> <goals> >> <goal>instrument</goal> >> </goals> >> </execution> >> <execution> >> <id>restore-classes</id> >> <goals> >> >> <goal>restore-instrumented-classes</goal> >> </goals> >> </execution> >> <execution> >> <id>default-report</id> >> <goals> >> <goal>report</goal> >> </goals> >> </execution> >> </executions> >> </plugin> >> <plugin> >> <artifactId>maven-surefire-plugin</artifactId> >> <configuration> >> <systemPropertyVariables> >> >> <jacoco-agent.destfile>target/jacoco.exec</jacoco-agent.destfile> >> </systemPropertyVariables> >> </configuration> >> </plugin> >> </plugins> >> </build> >> </profile> >> >> >> Now, when I invoke mvn clean install site -P jacoco-coverage, this of >> course leads to the JaCoCo report not being shown under Project Reports. >> On the other hand, adding >> >> <reporting> >> <plugins> >> <plugin> >> <groupId>org.jacoco</groupId> >> <artifactId>jacoco-maven-plugin</artifactId> >> </plugin> >> </plugins> >> </reporting> >> >> leads to JaCoCo attempting another instrumentation of the classes in the >> site rendering phase, which then fails. >> >> Is there a way to tell the jacoco-maven-plugin to not perform a second >> report generation, if there is already a generated report in the build >> sequence, so that it only attaches it as site artifact? >> >> >> Thank you! >> Florian >> >> -- >> You received this message because you are subscribed to the Google Groups >> "JaCoCo and EclEmma Users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to jacoco+unsubscr...@googlegroups.com. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/jacoco/82e705e3-1694-44ec-89f4-2fbdc42c5642%40googlegroups.com >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- > You received this message because you are subscribed to a topic in the > Google Groups "JaCoCo and EclEmma Users" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/jacoco/juY3yFMTkVw/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > jacoco+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jacoco/CAK8jvqxJSdvP0RtuzQiPschUSuMOxqZ-W48CCtYGw8yWJHUEyQ%40mail.gmail.com > <https://groups.google.com/d/msgid/jacoco/CAK8jvqxJSdvP0RtuzQiPschUSuMOxqZ-W48CCtYGw8yWJHUEyQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "JaCoCo and EclEmma Users" group. 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