congbobo184 commented on issue #13103:
URL: https://github.com/apache/pulsar/issues/13103#issuecomment-1237647178
@syhily hi
as you can see the jstack, thread block in `at
org.apache.pulsar.broker.systopic.SystemTopicClientBase.close(SystemTopicClientBase.java:100)`,
this close method is
```
List<CompletableFuture<Void>> futures = new ArrayList<>();
List<Writer<T>> tempWriters = Lists.newArrayList(writers);
tempWriters.forEach(writer -> futures.add(writer.closeAsync()));
List<Reader<T>> tempReaders = Lists.newArrayList(readers);
tempReaders.forEach(reader -> futures.add(reader.closeAsync()));
writers.clear();
readers.clear();
return FutureUtil.waitForAll(futures);
```
only close producers or consumers can block the thread.
https://github.com/apache/pulsar/pull/17051 has to fix the close produce or
consumer block thread problem, and I reproduce it in v2.10.0. carry this fix, I
can't reproduce. can you test it with this fix? Maybe the problem can be solved
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