Can not get real ip when use RackawareEnsemblePlacementPolicy

[casuallc]

BUG REPORT

Describe the bug

• set ensemblePlacementPolicy=org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicy
• set reppDnsResolverClass=myclass(implements DNSToSwitchMapping)

In some server, I get 127.0.0.1 when the method DNSToSwitchMapping.resolve called.
But the real ip (129.x.x.x) is expected.

Screenshots

Additional context

[casuallc]

10:58:55.262 [BookieJournal-3181] INFO  org.apache.bookkeeper.bookie.JournalChannel - Opening journal data/bookkeeper/journal/current/17c2a57469c.txn
10:58:55.335 [main-EventThread] INFO  org.apache.bookkeeper.discover.ZKRegistrationClient - Update BookieInfoCache (writable bookie) 192.168.1.23:3181 -> BookieServiceInfo{properties={}, endpoints=[EndpointInfo{id=bookie, port=3181, host=192.168.1.23, protocol=bookie-rpc, auth=[], extensions=[]}]}
10:58:55.336 [BookKeeperClientScheduler-OrderedScheduler-0-0] INFO  org.apache.bookkeeper.net.NetworkTopologyImpl - Adding a new node: /default-rack/192.168.1.23:3181
10:58:55.350 [main-EventThread] INFO  org.apache.bookkeeper.discover.ZKRegistrationClient - Update BookieInfoCache (writable bookie) 192.168.1.16:3181 -> BookieServiceInfo{properties={}, endpoints=[EndpointInfo{id=bookie, port=3181, host=192.168.1.16, protocol=bookie-rpc, auth=[], extensions=[]}]}
10:58:55.350 [BookKeeperClientScheduler-OrderedScheduler-0-0] INFO  org.apache.bookkeeper.net.NetworkTopologyImpl - Adding a new node: /default-rack/192.168.1.16:3181


10:58:55.874 [main-EventThread] INFO  org.apache.bookkeeper.discover.ZKRegistrationClient - Update BookieInfoCache (writable bookie) 192.168.1.23:3181 -> BookieServiceInfo{properties={}, endpoints=[EndpointInfo{id=bookie, port=3181, host=192.168.1.23, protocol=bookie-rpc, auth=[], extensions=[]}]}
10:58:55.875 [main-EventThread] INFO  org.apache.bookkeeper.discover.ZKRegistrationClient - Update BookieInfoCache (writable bookie) 192.168.1.16:3181 -> BookieServiceInfo{properties={}, endpoints=[EndpointInfo{id=bookie, port=3181, host=192.168.1.16, protocol=bookie-rpc, auth=[], extensions=[]}]}
10:58:55.929 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - AuthProvider used by the Auditor is null
10:58:55.952 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Initializing lostBookieRecoveryDelay zNode to the conif value: 0
10:58:55.954 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - I'm starting as Auditor Bookie. ID: 192.168.1.23:3181
10:58:55.962 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Auditor periodic bookie checking enabled 'auditorPeriodicBookieCheckInterval' 86400 seconds
10:58:55.962 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Auditor periodic ledger checking enabled 'auditorPeriodicCheckInterval' 604800 seconds
10:58:55.964 [AuditorElector-192.168.1.23:3181] WARN  org.apache.bookkeeper.meta.ZkLedgerUnderreplicationManager - checkAllLedgersCtimeZnode is not yet available
10:58:55.964 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - checkAllLedgers scheduling info.  checkAllLedgersLastExecutedCTime: -1 durationSinceLastExecutionInSecs: -1 initialDelay: 0 interval: 604800
10:58:55.964 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Starting auditBookies
10:58:55.965 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Periodic placementPolicy check disabled
10:58:55.965 [AuditorElector-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Periodic replicas check disabled
10:58:55.994 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Completed auditBookies
10:58:55.996 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.replication.Auditor - Starting checkAllLedgers

10:58:56.057 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl - Initialize rackaware ensemble placement policy @ <Bookie:127.0.0.1:0> @ /default-rack : org.apache.bookkeeper.client.TopologyAwareEnsemblePlacementPolicy$DefaultResolver.
10:58:56.057 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.client.RackawareEnsemblePlacementPolicyImpl - Not weighted
10:58:56.058 [AuditorBookie-192.168.1.23:3181] INFO  org.apache.bookkeeper.client.BookKeeper - Weighted ledger placement is not enabled

note
server ip is 192.168.1.23
hostname is 127.0.0.1