It was problem with /etc/resolv.conf in the end, unrelated to solr or zk. Thanks Erick!
On Mon, Feb 24, 2020 at 3:20 PM Erick Erickson <erickerick...@gmail.com> wrote: > Your solr logs on that node will probably give you a better idea of what > the root cause is. > > best, > Erick > > > On Feb 24, 2020, at 8:18 AM, Sotiris Fragkiskos <sfra...@gmail.com> > wrote: > > > > Hi all! > > I had a cluster with 2 solr nodes, and a single zk host and it all worked > > fine. > > Then we got 3 more VMs, so i configured them *in parallel* to the *exact* > > same configuration, so that they can be added to the existing cluster. > > 2 of them connected fine, and the third just refuses to. > > I can see it in the solr cloud, but cpu and heap have empty "%" sings > next > > to them. > > When doing service solr status, the error I get is > > > > ERROR: Failed to get system information from http:// > ***.***.**.**:8983/solr > > due to: org.apache.solr.common.SolrException: Parse error : <html> > > <head> > > <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/> > > <title>Error 404 Not Found</title> > > </head> > > <body><h2>HTTP ERROR 404</h2> > > <p>Problem accessing /solr/admin/info/system. Reason: > > <pre> Not Found</pre></p><h3>Caused > > by:</h3><pre>javax.servlet.ServletException: > > javax.servlet.UnavailableException: Error processing the request. > > CoreContainer is either not initialized or shutting down. > > > > Any idea what this is? > > > > Thanks in advance! > > > > Sotiri >