Thanks everyone for your reply. I have tried to put the following in zoo.cfg under ZooKeeper: 4lw.commands.whitelist=mntr,conf,ruok
But it is still showing this error. *"Errors: - membership: Check 4lq.commands.whitelist setting in zookeeper configuration file."* As I am using SolrCloud, the collection config can still be loaded to ZooKeeper as per normal. But if I tried to create a collection, I will get the following error: { "responseHeader":{ "status":400, "QTime":686}, "failure":{ "192.168.1.2:8983_solr":"org.apache.solr.client.solrj.SolrServerException:IOException occurred when talking to server at: http://192.168.1.2:8983/solr", "192.168.1.2:8984_solr":"org.apache.solr.client.solrj.SolrServerException:IOException occurred when talking to server at: http://192.168.1.2:8984/solr"}, "Operation create caused exception:":"org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: Underlying core creation failed while creating collection: collection1", "exception":{f "msg":"Underlying core creation failed while creating collection: collection1", "rspCode":400}, "error":{ "metadata":[ "error-class","org.apache.solr.common.SolrException", "root-error-class","org.apache.solr.common.SolrException"], "msg":"Underlying core creation failed while creating collection: collection1", "code":400}} Is there anything which I may have missed out? Regards, Edwin On Wed, 31 Jul 2019 at 00:12, Shawn Heisey <apa...@elyograg.org> wrote: > On 7/29/2019 11:45 PM, Enrico Olivelli wrote: > > Due to potential security risks since ZK 3.5 you have to explicitly > > whitelist some commands. > > The 3.5.5 documentation says that "*" can be used to whitelist all > commands. > > But what you just said seems to contradict that. If your statement is > more accurate, then the documentation should be updated to list the > commands that are NOT enabled when using a wildcard. > > There is a SOLR issue to upgrade the client in Solr to 3.5.5: > > https://issues.apache.org/jira/browse/SOLR-8346 > > A comment was made on this issue saying that the following config is > needed when the server is running 3.5.x: > > 4lw.commands.whitelist=mntr,conf,ruok > > Thanks, > Shawn >