codelipenghui opened a new pull request #12252:
URL: https://github.com/apache/pulsar/pull/12252


   The heartbeat namespace is sticky to a broker, so it will not owned by other 
brokers, It will not make any sense for rebalancing the heartbeat namespace.
   
   ```
   09:49:55.946 [pulsar-load-manager-1-1] WARN  
org.apache.pulsar.broker.loadbalance.impl.ModularLoadManagerImpl - Error when 
trying to perform load shedding on 
pulsar/pluster-2/10.1.131.232:8080/0x00000000_0xffffffff for broker 
10.1.131.232:8080 
org.apache.pulsar.client.admin.PulsarAdminException$NotFoundException: 
Namespace does not exist
           at 
org.apache.pulsar.client.admin.internal.BaseResource.getApiException(BaseResource.java:220)
           at 
org.apache.pulsar.client.admin.internal.BaseResource$1.failed(BaseResource.java:130)
           at 
org.glassfish.jersey.client.JerseyInvocation$1.failed(JerseyInvocation.java:839)
           at 
org.glassfish.jersey.client.JerseyInvocation$1.completed(JerseyInvocation.java:820)
           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$1(AsyncHttpConnector.java:212)
           at 
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
           at 
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
           at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
           at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975)
           at 
org.apache.pulsar.client.admin.internal.http.AsyncHttpConnector.lambda$retryOperation$3(AsyncHttpConnector.java:253)
           at 
java.util.concurrent.CompletableFuture.uniWhenComplete(CompletableFuture.java:774)
           at 
java.util.concurrent.CompletableFuture$UniWhenComplete.tryFire(CompletableFuture.java:750)
           at 
java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:488)
           at 
java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:1975)
           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)
    ```
   


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