casuallc commented on issue #11796:
URL: https://github.com/apache/pulsar/issues/11796#issuecomment-911068781
> Did you see this error in production ?
Nope.
When I add some other functions in broker, this error appeared.
```java
11:19:30.843 [broker-topic-workers-OrderedScheduler-7-0] ERROR
org.apache.bookkeeper.common.util.SafeRunnable - Unexpected throwable caught
java.lang.NullPointerException: null
at
org.apache.bookkeeper.mledger.impl.OpReadEntry.readEntriesFailed(OpReadEntry.java:94)
~[managed-ledger-2.8.0.jar:2.8.0]
at
org.apache.bookkeeper.mledger.impl.ManagedLedgerImpl.startReadOperationOnLedger(ManagedLedgerImpl.java:2334)
~[managed-ledger-2.8.0.jar:2.8.0]
at
org.apache.bookkeeper.mledger.impl.OpReadEntry.create(OpReadEntry.java:52)
~[managed-ledger-2.8.0.jar:2.8.0]
at
org.apache.bookkeeper.mledger.impl.ManagedCursorImpl.asyncReadEntriesOrWait(ManagedCursorImpl.java:736)
~[managed-ledger-2.8.0.jar:2.8.0]
at
org.apache.pulsar.broker.service.persistent.PersistentDispatcherSingleActiveConsumer.readMoreEntries(PersistentDispatcherSingleActiveConsumer.java:342)
~[pulsar-broker-2.8.0.jar:2.8.0]
at
org.apache.pulsar.broker.service.persistent.PersistentDispatcherSingleActiveConsumer.lambda$null$3(PersistentDispatcherSingleActiveConsumer.java:232)
~[pulsar-broker-2.8.0.jar:2.8.0]
at
org.apache.bookkeeper.mledger.util.SafeRun$1.safeRun(SafeRun.java:32)
~[managed-ledger-2.8.0.jar:2.8.0]
at
org.apache.bookkeeper.common.util.SafeRunnable.run(SafeRunnable.java:36)
[org.apache.bookkeeper-bookkeeper-common-4.14.1.jar:4.14.1]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
[?:1.8.0_231]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
[?:1.8.0_231]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
[?:1.8.0_231]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
[?:1.8.0_231]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[?:1.8.0_231]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[?:1.8.0_231]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
[io.netty-netty-common-4.1.63.Final.jar:4.1.63.Final]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_231]
```
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