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Michael Osipov commented on MNG-7716: ------------------------------------- Any change to have an IT here? > ConcurrencyDependencyGraph deadlock if no root can be selected > -------------------------------------------------------------- > > Key: MNG-7716 > URL: https://issues.apache.org/jira/browse/MNG-7716 > Project: Maven > Issue Type: Bug > Reporter: Christoph Läubrich > Priority: Major > > At Tycho we got a bug-report that results in a deadlock when calling the > tycho-version-plugin: > https://github.com/eclipse-tycho/tycho/issues/2169 > I debugged the problem and it seems that ConcurrencyDependencyGraph is > actually the culprit here because it can return an empty list of projects to > initially build. As no builds are scheduled then the code in the > MultiThreadedBuilder waits forever for the result, this is what happening > here: > * There is one segment {code}org.faktorips:base:pom:23.6.0-SNAPSHOT -> > [org.eclipse.tycho:tycho-versions-plugin:3.0.4-SNAPSHOT:set-version]{code} > * This segment has a transitive reactor dependency to {code}MavenProject: > org.faktorips:codequality-config:23.6.0-SNAPSHOT @ > faktorips.base/codequality-config/pom.xml{code} (this is not a problem > because we only execute a reactor=true mojo!) > * So now the loop finds that there is no "independent" project and returns an > empty list -- This message was sent by Atlassian Jira (v8.20.10#820010)