HI all - I think I am seeing something similar and I had just posted https://issues.apache.org/jira/browse/SOLR-11361 a bit ago.
Starters - on my test bed I decided to update from 6.2.1 to 6.6.1. All seemed okay until I restart Solr and the Core would not load. Going to 6.6.0 helped or at least the core would load but simlar hard errors are seen - and I think "Lock held by this virtual machine" seem related? from my posting/last comment: Me wrote > I just went and grabbed Solr 6.6.0 and unpacked it. Then I copied my > umslog core from 6.6.1 and ran the same tests. > > The problem that I am seeing in v6.6.1 does not appear to happen in v6.6.0 > > For the record, I am running from Windows Command Line just using the -p > 8181 or 8282 argument. > > Is this because of this error * > Lock held by this virtual machine * > . After a bit of time Solr 6.6.0 had the same error but the Core was still > operational. I stop 8181, move to port 8282 and there are no hard errors > listed. I move back to 8181 and the error is back. Lastly I shut down Solr > and just wait 30 minutes (perhaps more was not really counting) and 8181 > comes up with no hard errors. -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
