lifepuzzlefun opened a new issue, #4022:
URL: https://github.com/apache/bookkeeper/issues/4022
**BUG REPORT**
version pulsar 2.11.2 bookkeeper
the GarbageCollectorThread hang cause data can't be collected because when
it extract log metadata an exception throws.
```
2023-07-08T22:14:49,412+0800 [GarbageCollectorThread-19-1] WARN
org.apache.bookkeeper.bookie.EntryLogger - error when
extractEntryLogMetadataFromIndex
java.lang.IllegalArgumentException: Negative position
at sun.nio.ch.FileChannelImpl.read(FileChannelImpl.java:813) ~[?:?]
at
org.apache.bookkeeper.bookie.BufferedReadChannel.read(BufferedReadChannel.java:93)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.BufferedReadChannel.read(BufferedReadChannel.java:65)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.EntryLogger.extractEntryLogMetadataFromIndex(EntryLogger.java:1127)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.EntryLogger.getEntryLogMetadata(EntryLogger.java:1087)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.GarbageCollectorThread.extractMetaFromEntryLogs(GarbageCollectorThread.java:758)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.GarbageCollectorThread.runWithFlags(GarbageCollectorThread.java:411)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
org.apache.bookkeeper.bookie.GarbageCollectorThread.lambda$triggerGC$4(GarbageCollectorThread.java:319)
~[org.apache.bookkeeper-bookkeeper-server-4.15.4.jar:4.15.4]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[?:?]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?]
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304)
~[?:?]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
~[?:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
~[?:?]
at
io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
~[io.netty-netty-common-4.1.86.Final.jar:4.1.86.Final]
at java.lang.Thread.run(Thread.java:833) ~[?:?]
```
***To Reproduce***
I don't know , but this happen in our production environment.
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