Flaky-test: ExtensibleLoadManagerImplTest.testGetMetrics

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### Example failures

- [2023-11-07T06:42:05.0258599Z](https://github.com/apache/pulsar/actions/runs/6780607969/job/18429748342#step:11:1226)

### Exception stacktrace

```
java.lang.AssertionError: Sets differ: expected [dimensions=[{broker=localhost, metric=bundleUnloading, reason=CoolDown, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Splitting}], metrics=[{brk_sunit_state_chn_owner_lookup_total=11}], dimensions=[{broker=localhost, metric=sunitStateChn}], metrics=[{brk_sunit_state_chn_orphan_su_cleanup_ops_total=3, brk_sunit_state_chn_owned_su_total=10, brk_sunit_state_chn_su_tombstone_cleanup_ops_total=2}], dimensions=[{broker=localhost, event=Deleted, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=13}], dimensions=[{broker=localhost, event=Releasing, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=9}], dimensions=[{broker=localhost, event=Free, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=4}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoBrokers, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=8}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Releasing}], metrics=[{brk_sunit_state_chn_owner_lookup_total=10}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=OutDatedData, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=6}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Owned}], metrics=[{brk_sunit_state_chn_owner_lookup_total=5}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoLoadData, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=7}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Success}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=1}], dimensions=[{broker=localhost, event=Splitting, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=11}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Unknown, result=Failure}], metrics=[{brk_lb_unload_broker_breakdown_total=10}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Splitting}], metrics=[{brk_sunit_state_chn_owner_lookup_total=12}], dimensions=[{broker=localhost, feature=max_ema, metric=bundleUnloading, stat=std}], metrics=[{brk_lb_resource_usage_stats=0.3}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Assigning}], metrics=[{brk_sunit_state_chn_owner_lookup_total=8}], dimensions=[{broker=localhost, feature=max_ema, metric=bundleUnloading, stat=avg}], metrics=[{brk_lb_resource_usage_stats=1.5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Schedule}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Cancel}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=7}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Releasing}], metrics=[{brk_sunit_state_chn_owner_lookup_total=9}], dimensions=[{broker=localhost, feature=max, metric=loadBalancing}], metrics=[{brk_lb_resource_usage=0.04}], dimensions=[{broker=localhost, metric=assign, result=Skip}], metrics=[{brk_lb_assign_broker_breakdown_total=3}], dimensions=[{broker=localhost, metric=assign, result=Success}], metrics=[{brk_lb_assign_broker_breakdown_total=1}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoBundles, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=4}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Owned}], metrics=[{brk_sunit_state_chn_owner_lookup_total=6}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Underloaded, result=Success}], metrics=[{brk_lb_unload_broker_breakdown_total=2}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Unknown, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=9}], dimensions=[{broker=localhost, event=Unload, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_cleanup_ops_total=4}], dimensions=[{broker=localhost, event=Override, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=7}], dimensions=[{broker=localhost, metric=assign, result=Failure}], metrics=[{brk_lb_assign_broker_breakdown_total=2}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=MsgRate, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=3}], dimensions=[{broker=localhost, event=Owned, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=5}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Topics, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=1}], dimensions=[{broker=localhost, metric=loadBalancing}], metrics=[{brk_lb_bandwidth_in_usage=3.0, brk_lb_bandwidth_out_usage=4.0, brk_lb_cpu_usage=1.0, brk_lb_directMemory_usage=2.0, brk_lb_memory_usage=400.0}], dimensions=[{broker=localhost, event=Init, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=1}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Deleted}], metrics=[{brk_sunit_state_chn_owner_lookup_total=13}], dimensions=[{broker=localhost, feature=max_ema, metric=loadBalancing}], metrics=[{brk_lb_resource_usage=4.0}], dimensions=[{broker=localhost, event=Override, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=8}], dimensions=[{broker=localhost, event=Assign, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=2}], dimensions=[{broker=localhost, event=Releasing, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=10}], dimensions=[{broker=localhost, event=Deleted, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=14}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Assigning}], metrics=[{brk_sunit_state_chn_owner_lookup_total=7}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Init}], metrics=[{brk_sunit_state_chn_owner_lookup_total=1}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Sessions, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=2}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=HitCount, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=3}], dimensions=[{broker=localhost, metric=bundleUnloading}], metrics=[{brk_lb_unload_broker_total=2, brk_lb_unload_bundle_total=3}], dimensions=[{broker=localhost, event=Splitting, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=12}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Overloaded, result=Success}], metrics=[{brk_lb_unload_broker_breakdown_total=1}], dimensions=[{broker=localhost, event=Free, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=3}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Init}], metrics=[{brk_sunit_state_chn_owner_lookup_total=2}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Free}], metrics=[{brk_sunit_state_chn_owner_lookup_total=3}], dimensions=[{broker=localhost, event=Assigning, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=8}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Unknown, result=Failure}], metrics=[{brk_lb_bundles_split_breakdown_total=6}], dimensions=[{broker=localhost, metric=bundlesSplit}], metrics=[{brk_lb_bundles_split_total=35}], dimensions=[{broker=localhost, event=Init, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=2}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Admin, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Free}], metrics=[{brk_sunit_state_chn_owner_lookup_total=4}], dimensions=[{broker=localhost, event=Assign, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=1}], dimensions=[{broker=localhost, event=Assigning, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=7}], dimensions=[{broker=localhost, event=Owned, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=6}], dimensions=[{broker=localhost, event=Unload, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=6}], dimensions=[{broker=localhost, event=Split, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=4}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Deleted}], metrics=[{brk_sunit_state_chn_owner_lookup_total=14}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Bandwidth, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=4}], dimensions=[{broker=localhost, event=Split, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=3}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Skip}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=6}]] but got [dimensions=[{broker=localhost, metric=bundleUnloading, reason=Underloaded, result=Success}], metrics=[{brk_lb_unload_broker_breakdown_total=2}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=CoolDown, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=5}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Overloaded, result=Success}], metrics=[{brk_lb_unload_broker_breakdown_total=1}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoBundles, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=4}], dimensions=[{broker=localhost, metric=bundleUnloading}], metrics=[{brk_lb_unload_broker_total=2, brk_lb_unload_bundle_total=3}], dimensions=[{broker=localhost, feature=max_ema, metric=bundleUnloading, stat=avg}], metrics=[{brk_lb_resource_usage_stats=1.5}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Assigning}], metrics=[{brk_sunit_state_chn_owner_lookup_total=7}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Sessions, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=2}], dimensions=[{broker=localhost, event=Init, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=1}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Unknown, result=Failure}], metrics=[{brk_lb_unload_broker_breakdown_total=10}], dimensions=[{broker=localhost, metric=assign, result=Skip}], metrics=[{brk_lb_assign_broker_breakdown_total=3}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=MsgRate, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=3}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Owned}], metrics=[{brk_sunit_state_chn_owner_lookup_total=6}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Free}], metrics=[{brk_sunit_state_chn_owner_lookup_total=4}], dimensions=[{broker=localhost, event=Override, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=8}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Owned}], metrics=[{brk_sunit_state_chn_owner_lookup_total=5}], dimensions=[{broker=localhost, event=Assign, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=2}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoLoadData, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=7}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Unknown, result=Failure}], metrics=[{brk_lb_bundles_split_breakdown_total=6}], dimensions=[{broker=localhost, event=Assign, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=1}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Releasing}], metrics=[{brk_sunit_state_chn_owner_lookup_total=10}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=NoBrokers, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=8}], dimensions=[{broker=localhost, event=Assigning, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=8}], dimensions=[{broker=localhost, event=Splitting, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=12}], dimensions=[{broker=localhost, feature=max_ema, metric=bundleUnloading, stat=std}], metrics=[{brk_lb_resource_usage_stats=0.3}], dimensions=[{broker=localhost, event=Unload, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=6}], dimensions=[{broker=localhost, event=Owned, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=6}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Cancel}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=7}], dimensions=[{broker=localhost, metric=sunitStateChn}], metrics=[{brk_sunit_state_chn_orphan_su_cleanup_ops_total=3, brk_sunit_state_chn_owned_su_total=10, brk_sunit_state_chn_su_tombstone_cleanup_ops_total=2}], dimensions=[{broker=localhost, event=Free, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=4}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Releasing}], metrics=[{brk_sunit_state_chn_owner_lookup_total=9}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Splitting}], metrics=[{brk_sunit_state_chn_owner_lookup_total=11}], dimensions=[{broker=localhost, metric=assign, result=Success}], metrics=[{brk_lb_assign_broker_breakdown_total=1}], dimensions=[{broker=localhost, event=Owned, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=6}], dimensions=[{broker=localhost, event=Releasing, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=10}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Success}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=1}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Schedule}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=5}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Bandwidth, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=4}], dimensions=[{broker=localhost, event=Override, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=7}], dimensions=[{broker=localhost, metric=loadBalancing}], metrics=[{brk_lb_bandwidth_in_usage=3.0, brk_lb_bandwidth_out_usage=4.0, brk_lb_cpu_usage=1.0, brk_lb_directMemory_usage=2.0, brk_lb_memory_usage=400.0}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Init}], metrics=[{brk_sunit_state_chn_owner_lookup_total=1}], dimensions=[{broker=localhost, event=Split, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=3}], dimensions=[{broker=localhost, event=Init, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=2}], dimensions=[{broker=localhost, event=Splitting, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=11}], dimensions=[{broker=localhost, event=Releasing, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=9}], dimensions=[{broker=localhost, event=Split, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=4}], dimensions=[{broker=localhost, event=Deleted, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=13}], dimensions=[{broker=localhost, feature=max_ema, metric=loadBalancing}], metrics=[{brk_lb_resource_usage=4.0}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Admin, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=5}], dimensions=[{broker=localhost, feature=max, metric=loadBalancing}], metrics=[{brk_lb_resource_usage=0.04}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=OutDatedData, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=6}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Splitting}], metrics=[{brk_sunit_state_chn_owner_lookup_total=12}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Skip}], metrics=[{brk_sunit_state_chn_inactive_broker_cleanup_ops_total=6}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=Unknown, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=9}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Init}], metrics=[{brk_sunit_state_chn_owner_lookup_total=2}], dimensions=[{broker=localhost, event=Assigning, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=7}], dimensions=[{broker=localhost, event=Free, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=3}], dimensions=[{broker=localhost, metric=bundleUnloading, reason=HitCount, result=Skip}], metrics=[{brk_lb_unload_broker_breakdown_total=3}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Deleted}], metrics=[{brk_sunit_state_chn_owner_lookup_total=13}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Assigning}], metrics=[{brk_sunit_state_chn_owner_lookup_total=8}], dimensions=[{broker=localhost, event=Deleted, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_subscribe_ops_total=14}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure}], metrics=[{brk_sunit_state_chn_cleanup_ops_total=4}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Failure, state=Deleted}], metrics=[{brk_sunit_state_chn_owner_lookup_total=14}], dimensions=[{broker=localhost, metric=assign, result=Failure}], metrics=[{brk_lb_assign_broker_breakdown_total=2}], dimensions=[{broker=localhost, event=Unload, metric=sunitStateChn, result=Total}], metrics=[{brk_sunit_state_chn_event_publish_ops_total=5}], dimensions=[{broker=localhost, metric=bundlesSplit}], metrics=[{brk_lb_bundles_split_total=35}], dimensions=[{broker=localhost, metric=sunitStateChn, result=Total, state=Free}], metrics=[{brk_sunit_state_chn_owner_lookup_total=3}], dimensions=[{broker=localhost, metric=bundlesSplit, reason=Topics, result=Success}], metrics=[{brk_lb_bundles_split_breakdown_total=1}]]
at org.testng.Assert.fail(Assert.java:110)
at org.testng.Assert.assertEquals(Assert.java:2036)
at org.testng.Assert.assertEquals(Assert.java:1963)
at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerImplTest.testGetMetrics(ExtensibleLoadManagerImplTest.java:1168)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:139)
at org.testng.internal.invokers.InvokeMethodRunnable.runOne(InvokeMethodRunnable.java:47)
at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:76)
at org.testng.internal.invokers.InvokeMethodRunnable.call(InvokeMethodRunnable.java:11)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
at java.base/java.lang.Thread.run(Thread.java:1583)
```