codelipenghui opened a new issue #5686: NPE in RackwareEnsemblePlacementPolicyImpl. URL: https://github.com/apache/pulsar/issues/5686 **Describe the bug** ``` java.lang.NullPointerException: null at org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl.isEnsembleAdheringToPlacementPolicy(RackawareEnsemblePlacementPolicyImpl.java:1261) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl.replaceBookie(RackawareEnsemblePlacementPolicyImpl.java:681) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicy.replaceBookie(RackawareEnsemblePlacementPolicy.java:114) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.BookieWatcherImpl.replaceBookie(BookieWatcherImpl.java:278) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.EnsembleUtils.replaceBookiesInEnsemble(EnsembleUtils.java:71) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.LedgerHandle.lambda$ensembleChangeLoop$2(LedgerHandle.java:1908) ~[org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.MetadataUpdateLoop.writeLoop(MetadataUpdateLoop.java:122) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.MetadataUpdateLoop.run(MetadataUpdateLoop.java:111) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.LedgerHandle.ensembleChangeLoop(LedgerHandle.java:1927) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.LedgerHandle.handleBookieFailure(LedgerHandle.java:1876) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.client.PendingAddOp.writeComplete(PendingAddOp.java:360) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.proto.BookieClientImpl$1.safeRun(BookieClientImpl.java:280) [org.apache.bookkeeper-bookkeeper-server-4.9.2.jar:4.9.2] at org.apache.bookkeeper.common.util.SafeRunnable.run(SafeRunnable.java:36) [org.apache.bookkeeper-bookkeeper-common-4.9.2.jar:4.9.2] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171] at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) [io.netty-netty-common-4.1.43.Final.jar:4.1.43.Final] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] ``` **To Reproduce** Have no idea to reproduce it. **Additional context** in master branch
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