Hi, You probably have a stale Ivy lock file in ~/.ivy2/cache/, very likely orphaned as a result of manually interrupting the Lucene/Solr build, e.g. via Ctrl-C.
You can find it via e.g.: find ~/.ivy2/cache -name ‘*.lck’ Once you have found the stale lock file, manually deleting it should allow the build to start working again. FYI, LUCENE-6144[1] upgraded Lucene/Solr’s Ivy dependency to 2.4.0, and as part of that upgrade, switched the build’s lock strategy[2] from “artifact-lock” to “artifact-lock-nio”. As a result, in branch_5_5, branch_6_6, branch_7* and master, ‘*.lck’ files are expected to be present all the time in the Ivy cache, and their presence will not cause the build to fail. More info on IVY-1489[3]. [1] https://issues.apache.org/jira/browse/LUCENE-6144 [2] http://ant.apache.org/ivy/history/latest-milestone/settings/lock-strategies.html [3] https://issues.apache.org/jira/browse/IVY-1489 -- Steve www.lucidworks.com > On Apr 12, 2018, at 10:34 AM, rgummadi <rameshgumm...@gmail.com> wrote: > > I cloned lucene-solr git and working on git branch branch_6_4. I am trying to > make this eclipse compatible. > So I "ant eclipse" from the root folder. I am getting the below error. Can > some one suggest a resolution. > > [ivy:retrieve] :::::::::::::::::::::::::::::::::::::::::::::: > [ivy:retrieve] :: UNRESOLVED DEPENDENCIES :: > [ivy:retrieve] :::::::::::::::::::::::::::::::::::::::::::::: > [ivy:retrieve] :: junit#junit;4.10: not found > [ivy:retrieve] :::::::::::::::::::::::::::::::::::::::::::::: > [ivy:retrieve] > [ivy:retrieve] :::: ERRORS > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] impossible to acquire lock for junit#junit;4.10 > [ivy:retrieve] > [ivy:retrieve] :: USE VERBOSE OR DEBUG MESSAGE LEVEL FOR MORE DETAILS > > > > > > > -- > Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html