Hello, ZkDynamicConfig is something that's only been added in 8.6 as part of https://issues.apache.org/jira/browse/SOLR-14371 I'm not familiar with dynamic reconfig in zookeeper, so I don't know whether the client port number is supposed to optional or not.My reading of https://zookeeper.apache.org/doc/r3.5.5/zookeeperReconfig.html is that it's required, and only the client port *address* is optional
server.<positive id> = <address1>:<port1>:<port2>[:role];[<client port address>:]<client port>** Either way, ZkDynamicConfig isn't treating it as optional, so it's getting a NullPointerException when it tries to parse it as an int. If you can specify the client port in the /zookeeper/config like this (if your port is 2181 for example) then that might get you going server.1=dev-confluentzoo2014.sol-osl01.host.example.com > :7795:7796:participant;2181 > server.2=dev-confluentzoo2015.sol-osl01.host.example.com > :7795:7796:participant;2181 > server.3=dev-confluentzoo2016.sol-osl01.host.example.com > :7795:7796:participant;2181 > On Tue, 21 Jul 2020 at 12:24, Henrik B A <hen...@synth.no> wrote: > I get the following exception when accessing the Cloud -> ZK Status page in > Solr 8.6.0: > > ERROR [20200721T080439,063] qtp478489615-24 > org.apache.solr.servlet.HttpSolrCall - > null:java.lang.NumberFormatException: null > > at java.base/java.lang.Integer.parseInt(Integer.java:620) > > at java.base/java.lang.Integer.parseInt(Integer.java:776) > > at > > org.apache.solr.common.cloud.ZkDynamicConfig$Server.parseLine(ZkDynamicConfig.java:142) > > at > > org.apache.solr.common.cloud.ZkDynamicConfig.lambda$parseLines$0(ZkDynamicConfig.java:58) > > at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133) > > at > > java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) > > at > > java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) > > at > > org.apache.solr.common.cloud.ZkDynamicConfig.parseLines(ZkDynamicConfig.java:53) > > at > > org.apache.solr.handler.admin.ZookeeperStatusHandler.handleRequestBody(ZookeeperStatusHandler.java:83) > > at > > org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:214) > > at > org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:854) > > at > > org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:818) > > at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:566) > > at > > org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:415) > > at > > org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:345) > > at > > org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596) > > at > org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) > > at > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590) > > at > > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) > > at > > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) > > at > > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1300) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) > > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485) > > at > > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) > > at > > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1215) > > at > > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) > > at > > org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221) > > at > > org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146) > > at > > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) > > at org.eclipse.jetty.server.Server.handle(Server.java:500) > > at > org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383) > > at > org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547) > > at > org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375) > > at > org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273) > > at > org.eclipse.jetty.io > .AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) > > at org.eclipse.jetty.io > .FillInterest.fillable(FillInterest.java:103) > > at > org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117) > > at > > org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) > > at > > org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) > > at > > org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) > > at > > org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129) > > at > > org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:375) > > at > > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806) > > at > > org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938) > > at java.base/java.lang.Thread.run(Thread.java:830) > > My zknode's /zookeeper/config has this content: > > server.1=dev-confluentzoo2014.sol-osl01.host.example.com > :7795:7796:participant > server.2=dev-confluentzoo2015.sol-osl01.host.example.com > :7795:7796:participant > server.3=dev-confluentzoo2016.sol-osl01.host.example.com > :7795:7796:participant > version=0 > > This problem does not occur in 8.5.x. > > Cheers, > Henrik >