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Joseph Lynch commented on CASSANDRA-13993: ------------------------------------------ I cut CASSANDRA-14297 for follow up, will iterate in that ticket. > Add optional startup delay to wait until peers are ready > -------------------------------------------------------- > > Key: CASSANDRA-13993 > URL: https://issues.apache.org/jira/browse/CASSANDRA-13993 > Project: Cassandra > Issue Type: Improvement > Components: Lifecycle > Reporter: Jason Brown > Assignee: Jason Brown > Priority: Minor > Fix For: 4.0 > > > When bouncing a node in a large cluster, is can take a while to recognize the > rest of the cluster as available. This is especially true if using TLS on > internode messaging connections. The bouncing node (and any clients connected > to it) may see a series of Unavailable or Timeout exceptions until the node > is 'warmed up' as connecting to the rest of the cluster is asynchronous from > the rest of the startup process. > There are two aspects that drive a node's ability to successfully communicate > with a peer after a bounce: > - marking the peer as 'alive' (state that is held in gossip). This affects > the unavailable exceptions > - having both open outbound and inbound connections open and ready to each > peer. This affects timeouts. > Details of each of these mechanisms are described in the comments below. > This ticket proposes adding a mechanism, optional and configurable, to delay > opening the client native protocol port until some percentage of the peers in > the cluster is marked alive and connected to/from. Thus while we potentially > slow down startup (delay opening the client port), we alleviate the chance > that queries made by clients don't hit transient unavailable/timeout > exceptions. -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org