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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2021/09/08 15:34:19 UTC
[GitHub] [pulsar] sourabhaggrawal opened a new issue #11972: NPE while preparing racksandhost detail through RackawareEnsemblePlacementPolicyImpl
sourabhaggrawal opened a new issue #11972:
URL: https://github.com/apache/pulsar/issues/11972
**Describe the bug**
We are trying to configure rack-aware policy, when starting pulsar we get this error at RackAwareEnsemblePlacementPolicyImpl and then it end up using default-rack as per the logs.
18:10:36.083 [pulsar-ordered-OrderedExecutor-0-0] ERROR org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl - Failed to initialize DNS Resolver org.apache.pulsar.zookeeper.ZkBookieRackAffinityMapping, used default subnet resolver : java.lang.RuntimeException: java.lang.NullPointerException java.lang.NullPointerException
18:10:36.087 [pulsar-ordered-OrderedExecutor-0-0] INFO org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl - Initialize rackaware ensemble placement policy @ <Bookie:192.168.1.7:0> @ /default-rack : org.apache.bookkeeper.client.TopologyAwareEnsemblePlacementPolicy$DefaultResolver.
**To Reproduce**
Steps to reproduce the behavior:
1. Enable bookkeeperClientRackawarePolicyEnabled in pulsar broker.conf
2. Configure ensemblePlacementPolicy=org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicy in bookkeeper.conf
3. configure racks
4. start zookeeper, bookkeeper & pulsar
**Expected behavior**
Expected RackawareEnsemblePlacementPolicyImpl to initialise racks with given rack info and its bookies as per the implementation of ZKBookieRackAffinityMapping.
**Screenshots**
If applicable, add screenshots to help explain your problem.
**Desktop (please complete the following information):**
- OS: iOS
- Pulsar 2.8.0
- Bookkeeper 4.14.1
**Additional context**
While troubleshooting we found, during initialisation of RackAwareEnsemblePlacementPolicy it creates new instance of dnsResolver as below at line https://github.com/apache/bookkeeper/blob/97818f5123999396e66f5246420d3c7e3d25f53d/bookkeeper-server/src/main/java/org/apache/bookkeeper/client/RackawareEnsemblePlacementPolicyImpl.java#L262
dnsResolver = ReflectionUtils.newInstance(dnsResolverName, DNSToSwitchMapping.class);
if (dnsResolver instanceof Configurable) {
((Configurable) dnsResolver).setConf(conf);
}
setConf is then triggered on ZKBookieRackAffinityMapping which throws NullPointer at https://github.com/apache/pulsar/blob/89ac98e4af363b09f2fe8e309539b0e35243aaee/pulsar-zookeeper-utils/src/main/java/org/apache/pulsar/zookeeper/ZkBookieRackAffinityMapping.java#L97 while prepare rack with its host information.
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[GitHub] [pulsar] casuallc commented on issue #11972: NPE while preparing racksandhost detail through RackawareEnsemblePlacementPolicyImpl
Posted by GitBox <gi...@apache.org>.
casuallc commented on issue #11972:
URL: https://github.com/apache/pulsar/issues/11972#issuecomment-918729383
Same proble in https://github.com/apache/bookkeeper/pull/2788.
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[GitHub] [pulsar] github-actions[bot] commented on issue #11972: NPE while preparing racksandhost detail through RackawareEnsemblePlacementPolicyImpl
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on issue #11972:
URL: https://github.com/apache/pulsar/issues/11972#issuecomment-1057583499
The issue had no activity for 30 days, mark with Stale label.
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