tablet load balancer log spam

[avikivity]

INFO  2024-03-25 15:55:24,626 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 15:55:24,626 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 15:55:24,626 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 15:56:24,626 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 15:56:24,627 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 15:56:24,627 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 15:56:24,627 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 15:56:24,627 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 15:57:24,627 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 15:57:24,627 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 15:57:24,627 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 15:57:24,627 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 15:57:24,627 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 15:58:24,627 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 15:58:24,628 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 15:58:24,628 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 15:58:24,628 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 15:58:24,628 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 15:59:24,628 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 15:59:24,628 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 15:59:24,628 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 15:59:24,628 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 15:59:24,628 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 16:00:24,628 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 16:00:24,629 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 16:00:24,629 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 16:00:24,629 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 16:00:24,629 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 16:01:24,628 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 16:01:24,629 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 16:01:24,629 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 16:01:24,629 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 16:01:24,629 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)
INFO  2024-03-25 16:02:24,629 [shard 0:strm] raft_topology - raft topology: Refreshing table load stats for DC datacenter1 that has 1 endpoints
INFO  2024-03-25 16:02:24,629 [shard 0:strm] load_balancer - Examining DC datacenter1
INFO  2024-03-25 16:02:24,629 [shard 0:strm] load_balancer - Node cc63bcd3-ff6d-4de1-ae85-5a8225ab099c: rack=rack1 avg_load=0, tablets=0, shards=2, state=normal
INFO  2024-03-25 16:02:24,629 [shard 0:strm] load_balancer - Prepared 0 migrations in DC datacenter1
INFO  2024-03-25 16:02:24,629 [shard 0:strm] load_balancer - Prepared 0 migration plans, out of which there were 0 tablet migration(s) and 0 resize decision(s)

There's no information in these logs.

[tgrabiec]

What's the scenario? The re-examination shouldn't happen without a triggering event.

[avikivity]

Idle single-node cluster.

[avikivity]

Probably empty, too. I was looking at the auth schema.

[michoecho]

2209c7440cbac66d7a27f8f8be050cb22376598a added the code which wakes up the load balancer every 60s.

[raphaelsc]

2209c74 added the code which wakes up the load balancer every 60s.

maybe we could use an exponential backoff retry which is reset to 60s when work is found