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[fix][broker] Fix broker load manager class filter NPE - #20350
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Demogorgon314 merged 3 commits intoMay 22, 2023
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## master #20350 +/- ##
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+ Coverage 36.80% 72.92% +36.11%
- Complexity 12046 31863 +19817
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Files 1687 1864 +177
Lines 128755 138319 +9564
Branches 14002 15172 +1170
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+ Hits 47389 100867 +53478
+ Misses 75106 29448 -45658
- Partials 6260 8004 +1744
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coderzc
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heesung-sohn
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poorbarcode
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May 30, 2023
PIP: #16691 ### Motivation When upgrading the pulsar version and changing the pulsar load manager to `ExtensibleLoadManagerImpl` it might cause NPE. The root cause is the old version of pulsar does not contain the `loadManagerClassName` field. ``` 2023-05-18T05:42:50,557+0000 [pulsar-io-4-1] INFO org.apache.pulsar.broker.service.ServerCnx - [/127.0.0.6:51345] connected with role=[pulsarinstance-v3-0-n@test.dev](mailto:pulsarinstance-v3-0-n@test.dev) using authMethod=token, clientVersion=Pulsar Go 0.9.0, clientProtocolVersion=18, proxyVersion=null 2023-05-18T05:42:50,558+0000 [pulsar-io-4-1] WARN org.apache.pulsar.broker.lookup.TopicLookupBase - Failed to lookup [pulsarinstance-v3-0-n@test.dev](mailto:pulsarinstance-v3-0-n@test.dev) for topic persistent://xxx with error java.lang.NullPointerException: Cannot invoke “String.equals(Object)” because the return value of “org.apache.pulsar.broker.loadbalance.extensions.data.BrokerLookupData.getLoadManagerClassName()” is null java.util.concurrent.CompletionException: java.lang.NullPointerException: Cannot invoke “String.equals(Object)” because the return value of “org.apache.pulsar.broker.loadbalance.extensions.data.BrokerLookupData.getLoadManagerClassName()” is null at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:315) ~[?:?] at java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1194) ~[?:?] at java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309) ~[?:?] at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerImpl.selectAsync(ExtensibleLoadManagerImpl.java:385) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerImpl.lambda$assign$6(ExtensibleLoadManagerImpl.java:336) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] at java.util.concurrent.CompletableFuture.uniComposeStage(CompletableFuture.java:1187) ~[?:?] at java.util.concurrent.CompletableFuture.thenCompose(CompletableFuture.java:2309) ~[?:?] at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerImpl.lambda$assign$10(ExtensibleLoadManagerImpl.java:333) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.common.util.collections.ConcurrentOpenHashMap$Section.put(ConcurrentOpenHashMap.java:409) ~[io.streamnative-pulsar-common-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.common.util.collections.ConcurrentOpenHashMap.computeIfAbsent(ConcurrentOpenHashMap.java:243) ~[io.streamnative-pulsar-common-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerImpl.assign(ExtensibleLoadManagerImpl.java:327) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.broker.loadbalance.extensions.ExtensibleLoadManagerWrapper.findBrokerServiceUrl(ExtensibleLoadManagerWrapper.java:66) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] at org.apache.pulsar.broker.namespace.NamespaceService.lambda$getBrokerServiceUrlAsync$0(NamespaceService.java:191) ~[io.streamnative-pulsar-broker-3.0.0.1.jar:3.0.0.1] ``` ### Modifications * Add null check when using`getLoadManagerClassName`. * Add test to cover this case. * Add `RedirectManager` unit test. (cherry picked from commit b7f0004)
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PIP: #16691
Motivation
When upgrading the pulsar version and changing the pulsar load manager to
ExtensibleLoadManagerImplit might cause NPE. The root cause is the old version of pulsar does not contain theloadManagerClassNamefield.Modifications
getLoadManagerClassName.RedirectManagerunit test.Documentation
docdoc-requireddoc-not-neededdoc-complete