// notify listeners about "soft" project build failures only
        if (t instanceof Exception && !(t instanceof RuntimeException)) {
            eventCatapult.fire(ExecutionEvent.Type.ProjectFailed, currentSession, null, (Exception) t);
        }

        // reactor failure modes
        if (t instanceof RuntimeException || !(t instanceof Exception)) {

             * global profile manager which is required to build a POM like a CLI invocation does. Failure to consider
             * the activated profiles can cause repo declarations to be lost which in turn will result in artifact
             * resolution failures, in particular when using the enhanced local repo which guards access to local files
             * based on the configured remote repos.

        File artifactFile = new File(repository.getBasedir(), path);

        if (artifactFile.exists()) {
            if (!artifactFile.delete()) {
                throw new IOException("Failure while attempting to delete artifact " + artifactFile);
            }
        }
    }

    protected DefaultRepositorySystemSession initRepoSession() throws Exception {

- plugin artifact retrieval problem
- plugin dependency metadata missing
- plugin dependency metadata retrieval problem
- plugin configuration problem
- plugin execution failure due to something that is know to possibly go wrong (like compilation failure)
- plugin execution error due to something that is not expected to go wrong (the compiler executable missing)

        wagonManager.getArtifact(artifact, repo, null, false);

        wagon.clearExpectedContent();
        wagon.addExpectedContent("path", "expected-failure");
        wagon.addExpectedContent("path.sha1", "b7bb97d7d0b9244398d9b47296907f73313663e6");
        assertThrows(
                ChecksumFailedException.class,

            } else if (!artifact.getFile().exists()) {
                String error = updateCheckManager.getError(artifact, repository);
                if (error != null) {
                    throw new TransferFailedException("Failure to resolve " + remotePath + " from "
                            + repository.getUrl()
                            + " was cached in the local repository. "

    int LOGGING_LEVEL_FATAL = Logger.LEVEL_FATAL;

    int LOGGING_LEVEL_DISABLED = Logger.LEVEL_DISABLED;

    // ----------------------------------------------------------------------
    // Reactor Failure Mode
    // ----------------------------------------------------------------------

    String REACTOR_FAIL_FAST = "FAIL_FAST";

    String REACTOR_FAIL_AT_END = "FAIL_AT_END";

            logger.debug("Ignoring unresolvable plugin version {}", version, e);
            return false;
        } catch (Exception e) {
            // ignore for now and delay failure to higher level processing
            return true;
        }

        try {
            pluginManager.checkPrerequisites(pluginDescriptor);
        } catch (Exception e) {