Demogorgon314 opened a new pull request, #20350: URL: https://github.com/apache/pulsar/pull/20350
PIP: https://github.com/apache/pulsar/issues/16691 ### Motivation When upgrading the pulsar version and changing the pulsar load manager to `ExtensibleLoadManagerImpl` it might cause NPE, ``` 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=[[email protected]](mailto:[email protected]) 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 [[email protected]](mailto:[email protected]) 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. ### Documentation <!-- DO NOT REMOVE THIS SECTION. CHECK THE PROPER BOX ONLY. --> - [ ] `doc` <!-- Your PR contains doc changes. --> - [ ] `doc-required` <!-- Your PR changes impact docs and you will update later --> - [x] `doc-not-needed` <!-- Your PR changes do not impact docs --> - [ ] `doc-complete` <!-- Docs have been already added --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
