Description
I tried viewing the ZK admin screen for Zookeeper 3.4.9, but it fails with stack:
2020-08-13 12:05:43.317 INFO (qtp489411441-25) [ ] o.a.s.s.HttpSolrCall [admin] webapp=null path=/admin/zookeeper/status params={wt=json&_=1597320343286} status=500 QTime=2
2020-08-13 12:05:43.317 ERROR (qtp489411441-25) [ ] o.a.s.s.HttpSolrCall null:org.apache.solr.common.SolrException: Failed to get config from zookeeper
at org.apache.solr.common.cloud.SolrZkClient.getConfig(SolrZkClient.java:777)
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$CachedChain.doFilter(ServletHandler.java:1596)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1300)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1215)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221)
at org.eclipse.jetty.server.handler.InetAccessHandler.handle(InetAccessHandler.java:177)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:500)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
at org.eclipse.jetty.io.AbstractConnection$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$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Unknown Source)
Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /zookeeper/config
at org.apache.zookeeper.KeeperException.create(KeeperException.java:118)
at org.apache.zookeeper.KeeperException.create(KeeperException.java:54)
at org.apache.zookeeper.ZooKeeper.getConfig(ZooKeeper.java:2237)
at org.apache.zookeeper.ZooKeeper.getConfig(ZooKeeper.java:2292)
at org.apache.solr.common.cloud.SolrZkClient.getConfig(SolrZkClient.java:771)
... 44 more
The reason is that in 4.9 there is no /zookeeper/config node in zk, and our new code to parse this dynamic config throws an exception even for NoNodeException from ZK.
The proposed fix is to instead return an empty string in that specific case, so it will fall back to parsing only the connection string.
Attachments
Issue Links
- is caused by
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SOLR-14371 Zk StatusHandler should know about dynamic zk config
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- Closed
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- links to
