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  1. Realm Core
  2. RCORE-469

Infinite reconnect in case of DNS resolution failure

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      It looks like the Sync Client goes into an infinite reconnect loop if there is DNS resolution failure. We need to figure out if this is a problem in the Sync Client or in Object Store. Either way, the behaviour is undesirable. As a minimum, there should be exponential backoff applied.

      2020-04-29 15:36:51.641 29277-29319/io.realm.test D/REALM_SYNC: Connection[2]: Connecting to endpoint '75.2.26.70:443' (1/2)
2020-04-29 15:36:51.912 29277-29319/io.realm.test I/REALM_SYNC: Connection[2]: Connected to endpoint '75.2.26.70:443' (from '192.168.232.2:37910')
2020-04-29 15:36:52.054 29277-29319/io.realm.test E/REALM_SYNC: Connection[2]: SSL handshake failed: Connection reset by peer
2020-04-29 15:36:52.054 29277-29319/io.realm.test I/REALM_SYNC: Connection[2]: Connection closed due to error
2020-04-29 15:36:52.054 29277-29319/io.realm.test I/REALM_JAVA: Session Error[wss://realm-dev.mongodb.com/]: CONNECTION_RESET_BY_PEER(realm.basic_system:104): Connection reset by peer
2020-04-29 15:36:52.054 29277-29319/io.realm.test D/REALM_SYNC: Connection[2]: Allowing reconnection in 453 milliseconds
2020-04-29 15:36:52.509 29277-29319/io.realm.test D/REALM_SYNC: Connection[2]: Resolving 'realm-dev.mongodb.com:443'
2020-04-29 15:36:52.510 1614-29405/? E/ResolverController: No valid NAT64 prefix (113, <unspecified>/0)
// This just repeats as fast as possible

            Assignee:
            jonathan.reams@mongodb.com Jonathan Reams
            Reporter:
            christian.melchior@mongodb.com Christian Melchior (Inactive)
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              Created:
              Updated:
              Resolved: