[SOLR-14463] solr admin ui: zkstatus: For input string: "null" with zk 3.6.x

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 8.5.1
• Fix Version/s: 8.6
• Assignee: Jan Høydahl
• Reporter: Bernd Wahlen
• Created: 07/May/20 14:17
• Updated: 21/Jul/20 12:31
• Resolved: 12/May/20 09:03

Description

When i select in solr 8.5.1 webinterface: Cloud - ZK Status i got
For input string: "null"

This happens after upgrading the leader to zookeeper 3.6.1 (upgrading the followers before was not a problem). From my view configuration is running, just the status web page doesn't.
I remember that there was similar problem before with solr/zk version incompatibilities. From zookeeper documentation 3.6.1 should be fully compatible with 3.5 clients.
Annoyingly there is no official zk 3.6.1 docker container available, but i think it is easy to reproduce.

and from solr.log file:

2020-05-07 15:58:33.194 ERROR (qtp1940055334-231) [   ] o.a.s.h.RequestHandlerBase java.lang.NumberFormatException: For input string: "null"
        at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.base/java.lang.Integer.parseInt(Integer.java:652)
        at java.base/java.lang.Integer.parseInt(Integer.java:770)
        at org.apache.solr.handler.admin.ZookeeperStatusHandler.getZkStatus(ZookeeperStatusHandler.java:116)
        at org.apache.solr.handler.admin.ZookeeperStatusHandler.handleRequestBody(ZookeeperStatusHandler.java:78)
        at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:211)
        at org.apache.solr.servlet.HttpSolrCall.handleAdmin(HttpSolrCall.java:842)
        at org.apache.solr.servlet.HttpSolrCall.handleAdminRequest(HttpSolrCall.java:808)
        at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:559)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:420)
        at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:352)
        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:1607)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297)
        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:1577)
        at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212)
        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.InetAccessHandler.handle(InetAccessHandler.java:177)
        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.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
        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$1(HttpChannel.java:383)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270)
        at org.eclipse.jetty.io.AbstractConnection$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:388)
        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:834)

Others have the same isues:
https://www.reddit.com/r/Solr/comments/fld4l6/issue_with_zk_status_page/

Issue Links

• relates to: SOLR-14671 NumberFormatException on ZK Status page when client port missing in dynamic config
• links to: GitHub Pull Request #1499