shibd opened a new issue, #16705:
URL: https://github.com/apache/pulsar/issues/16705

   
    NamespaceServiceTest.testSplitBundleWithHighestThroughput is flaky. It 
fails sporadically.
   
   [example 
failure](https://github.com/apache/pulsar/runs/7428130796?check_suite_focus=true)
   
   ```
     Error:  
testSplitBundleWithHighestThroughput(org.apache.pulsar.broker.namespace.NamespaceServiceTest)
  Time elapsed: 8.447 s  <<< FAILURE!
     
org.apache.pulsar.client.admin.PulsarAdminException$ServerSideErrorException: 
     
      --- An unexpected error occurred in the server ---
     
     Message: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
     
     Stacktrace:
     
     java.lang.NullPointerException: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
   ```
   
   <details>
   <summary>Full exception stacktrace</summary>
   <code><pre>
   Error:  Tests run: 26, Failures: 1, Errors: 0, Skipped: 15, Time elapsed: 
165.581 s <<< FAILURE! - in 
org.apache.pulsar.broker.namespace.NamespaceServiceTest
     Error:  
testSplitBundleWithHighestThroughput(org.apache.pulsar.broker.namespace.NamespaceServiceTest)
  Time elapsed: 8.447 s  <<< FAILURE!
     
org.apache.pulsar.client.admin.PulsarAdminException$ServerSideErrorException: 
     
      --- An unexpected error occurred in the server ---
     
     Message: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
     
     Stacktrace:
     
     java.lang.NullPointerException: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
        at 
org.apache.pulsar.broker.admin.impl.NamespacesBase.getBundleRange(NamespacesBase.java:1225)
        at 
org.apache.pulsar.broker.admin.impl.NamespacesBase.internalSplitNamespaceBundle(NamespacesBase.java:1114)
        at 
org.apache.pulsar.broker.admin.v1.Namespaces.splitNamespaceBundle(Namespaces.java:904)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at 
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
        at 
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$VoidOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:159)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
        at 
org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at 
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
        at 
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
        at 
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
        at 
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
        at 
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
        at 
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
        at 
org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
        at 
org.apache.pulsar.broker.web.ResponseHandlerFilter.doFilter(ResponseHandlerFilter.java:67)
        at 
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
        at 
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
        at org.eclipse.jetty.servlets.QoSFilter.doFilter(QoSFilter.java:202)
        at 
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
        at 
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
        at 
org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:181)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.Server.handle(Server.java:516)
        at 
org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
        at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:833)
     
        at 
org.apache.pulsar.client.admin.PulsarAdminException.wrap(PulsarAdminException.java:252)
        at 
org.apache.pulsar.client.admin.internal.BaseResource.sync(BaseResource.java:302)
        at 
org.apache.pulsar.client.admin.internal.NamespacesImpl.splitNamespaceBundle(NamespacesImpl.java:1156)
        at 
org.apache.pulsar.client.admin.internal.NamespacesImpl.splitNamespaceBundle(NamespacesImpl.java:1143)
        at 
org.apache.pulsar.broker.namespace.NamespaceServiceTest.testSplitBundleWithHighestThroughput(NamespaceServiceTest.java:652)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at 
org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
        at 
org.testng.internal.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:45)
        at 
org.testng.internal.InvokeMethodRunnable.call(InvokeMethodRunnable.java:73)
        at 
org.testng.internal.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:833)
        Suppressed: 
org.apache.pulsar.client.admin.PulsarAdminException$ServerSideErrorException: 
      --- An unexpected error occurred in the server ---
     
     Message: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
     
     Stacktrace:
     
     java.lang.NullPointerException: Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
        at 
org.apache.pulsar.broker.admin.impl.NamespacesBase.getBundleRange(NamespacesBase.java:1225)
        at 
org.apache.pulsar.broker.admin.impl.NamespacesBase.internalSplitNamespaceBundle(NamespacesBase.java:1114)
        at 
org.apache.pulsar.broker.admin.v1.Namespaces.splitNamespaceBundle(Namespaces.java:904)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:568)
        at 
org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
        at 
org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$VoidOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:159)
        at 
org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:475)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:397)
        at 
org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81)
        at 
org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
        at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
        at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
        at 
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
        at 
org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234)
        at 
org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:680)
        at 
org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:394)
        at 
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:366)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:319)
        at 
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
        at 
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:799)
        at 
org.eclipse.jetty.servlet.ServletHandler$ChainEnd.doFilter(ServletHandler.java:1656)
        at 
org.apache.pulsar.broker.web.ResponseHandlerFilter.doFilter(ResponseHandlerFilter.java:67)
        at 
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
        at 
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
        at org.eclipse.jetty.servlets.QoSFilter.doFilter(QoSFilter.java:202)
        at 
org.eclipse.jetty.servlet.FilterHolder.doFilter(FilterHolder.java:193)
        at 
org.eclipse.jetty.servlet.ServletHandler$Chain.doFilter(ServletHandler.java:1626)
        at 
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:552)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at 
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1624)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1440)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
        at 
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:505)
        at 
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1594)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
        at 
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1355)
        at 
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at 
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
        at 
org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
        at 
org.eclipse.jetty.server.handler.StatisticsHandler.handle(StatisticsHandler.java:181)
        at 
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
        at org.eclipse.jetty.server.Server.handle(Server.java:516)
        at 
org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:487)
        at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:732)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:479)
        at 
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:277)
        at 
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
        at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:338)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:315)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:173)
        at 
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:131)
        at 
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:409)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:833)
     
                at 
org.apache.pulsar.client.admin.internal.BaseResource.getApiException(BaseResource.java:223)
                at 
org.apache.pulsar.client.admin.internal.BaseResource$1.failed(BaseResource.java:134)
                at 
org.glassfish.jersey.client.JerseyInvocation$1.failed(JerseyInvocation.java:882)
                at 
org.glassfish.jersey.client.JerseyInvocation$1.completed(JerseyInvocation.java:863)
                at 
org.glassfish.jersey.client.ClientRuntime.processResponse(ClientRuntime.java:229)
                at 
org.glassfish.jersey.client.ClientRuntime.access$200(ClientRuntime.java:62)
                at 
org.glassfish.jersey.client.ClientRuntime$2.lambda$response$0(ClientRuntime.java:173)
                at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
                at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
                at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
                at 
org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:288)
                at 
org.glassfish.jersey.client.ClientRuntime$2.response(ClientRuntime.java:173)
                at 
org.apache.pulsar.client.admin.internal.http.AsyncHttpConnector.lambda$apply$1(AsyncHttpConnector.java:242)
                at 
java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:863)
                at 
java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:841)
                at 
java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
                at 
java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
                at 
org.apache.pulsar.client.admin.internal.http.AsyncHttpConnector.lambda$retryOperation$4(AsyncHttpConnector.java:284)
                at 
java.base/java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:863)
                at 
java.base/java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:841)
                at 
java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
                at 
java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
                at 
org.asynchttpclient.netty.NettyResponseFuture.loadContent(NettyResponseFuture.java:222)
                at 
org.asynchttpclient.netty.NettyResponseFuture.done(NettyResponseFuture.java:257)
                at 
org.asynchttpclient.netty.handler.AsyncHttpClientHandler.finishUpdate(AsyncHttpClientHandler.java:241)
                at 
org.asynchttpclient.netty.handler.HttpHandler.handleChunk(HttpHandler.java:114)
                at 
org.asynchttpclient.netty.handler.HttpHandler.handleRead(HttpHandler.java:143)
                at 
org.asynchttpclient.netty.handler.AsyncHttpClientHandler.channelRead(AsyncHttpClientHandler.java:78)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
                at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
                at 
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
                at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
                at 
io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
                at 
io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:327)
                at 
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:299)
                at 
io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
                at 
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357)
                at 
io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379)
                at 
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365)
                at 
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
                at 
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
                at 
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722)
                at 
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658)
                at 
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584)
                at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496)
                at 
io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:995)
                at 
io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
                at 
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
                ... 1 more
        Caused by: javax.ws.rs.InternalServerErrorException: HTTP 
[500](https://github.com/apache/pulsar/runs/7428130796?check_suite_focus=true#step:10:501)
 Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null
                at 
org.glassfish.jersey.client.JerseyInvocation.convertToException(JerseyInvocation.java:960)
                at 
org.glassfish.jersey.client.JerseyInvocation.access$[700](https://github.com/apache/pulsar/runs/7428130796?check_suite_focus=true#step:10:701)(JerseyInvocation.java:82)
                ... 54 more
     Caused by: [CIRCULAR REFERENCE: javax.ws.rs.InternalServerErrorException: 
HTTP 500 Cannot invoke 
"org.apache.pulsar.common.naming.NamespaceBundle.getBundleRange()" because the 
return value of 
"org.apache.pulsar.broker.admin.impl.NamespacesBase.findHotBundle(org.apache.pulsar.common.naming.NamespaceName)"
 is null]
   </pre></code>
   </details>
   


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