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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2021/09/03 20:04:16 UTC
[GitHub] [pulsar] hozumit opened a new issue #11920: Topics occasionally remain unassigned. (Namespace is being unloaded, cannot add topic)
hozumit opened a new issue #11920:
URL: https://github.com/apache/pulsar/issues/11920
**Describe the bug**
I found that sometimes a topic remains unassigned after unloading.
The following message is repeatedly appeared in broker log.
```
08:28:28.538 [pulsar-io-4-15] WARN org.apache.pulsar.broker.service.BrokerService - Namespace is being unloaded, cannot add topic persistent://mytenant/mynamespace/xxx-partition-37
```
The following log is the beginning of unloading.
```
09:57:13.634 [pulsar-web-40-7] INFO org.apache.pulsar.broker.admin.impl.NamespacesBase - [null] Unloading namespace bundle mytenant/mynamespace/0x7ef23d0b_0x80000000
09:57:13.725 [pulsar-web-40-7] INFO org.apache.pulsar.broker.namespace.OwnedBundle - Disabling ownership: mytenant/mynamespace/0x7ef23d0b_0x80000000
09:57:13.727 [pulsar-web-40-7] INFO org.apache.pulsar.broker.service.BrokerService - [persistent://mytenant/mynamespace/xxx-partition-37] Unloading topic
```
```
$ docker exec -it pulsar_broker bin/pulsar-admin topics stats "persistent://mytenant/mynamespace/xxx-partition-37"
Can't find owner for topic persistent://mytenant/mynamespace/xxx-partition-37
Reason: Can't find owner for topic persistent://mytenant/mynamespace/xxx-partition-37
```
I saw this issue several times on different partitions of a topic, which have heavy loads.
I have solved the problem by restarting a broker process(docker container).
**To Reproduce**
Steps to reproduce the behavior:
Trigger unloading by command line( `bin/pulsar-admin namespaces unload mytenant/mynamespace` ) or broker load shedding.
Topic unloading and assignment mostly works. I think that it fails when brokers are in relatively heavy loads.
**Expected behavior**
I don't know if the allocation failure is a bug or not, but brokers should at least try to re-allocate the topic as soon as possible after the allocation failure.
I have solved the problem by restarting the broker process, so I think successive allocations will work.
**Desktop (please complete the following information):**
- OS: CentOS
- Pulsar (broker and client): v2.8.0
**Additional context**
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[GitHub] [pulsar] hozumit commented on issue #11920: Topics occasionally remain unassigned. (Namespace is being unloaded, cannot add topic)
Posted by GitBox <gi...@apache.org>.
hozumit commented on issue #11920:
URL: https://github.com/apache/pulsar/issues/11920#issuecomment-913758827
@gaozhangmin v2.8.0. Thank you for sharing the pr. It seems to be the same problem. I will wait v2.8.1 release.
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[GitHub] [pulsar] hozumit closed issue #11920: Topics occasionally remain unassigned. (Namespace is being unloaded, cannot add topic)
Posted by GitBox <gi...@apache.org>.
hozumit closed issue #11920:
URL: https://github.com/apache/pulsar/issues/11920
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[GitHub] [pulsar] hozumit commented on issue #11920: Topics occasionally remain unassigned. (Namespace is being unloaded, cannot add topic)
Posted by GitBox <gi...@apache.org>.
hozumit commented on issue #11920:
URL: https://github.com/apache/pulsar/issues/11920#issuecomment-917861002
I've confirmed that the problem has been fixed in v2.8.1.
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[GitHub] [pulsar] gaozhangmin commented on issue #11920: Topics occasionally remain unassigned. (Namespace is being unloaded, cannot add topic)
Posted by GitBox <gi...@apache.org>.
gaozhangmin commented on issue #11920:
URL: https://github.com/apache/pulsar/issues/11920#issuecomment-913458762
which version you are using? this pr may fixed. #11310
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