hi, we see the following behaviour in our environment:
cluster consists of 6 nodes (cassandra version 3.0.7). keyspace has a replication factor 3. clients are writing data to the keyspace with consistency one. we are doing parallel, incremental repairs with cassandra reaper. even if a repair just finished and we are starting a new one immediately, we can see the following entries in our logs: INFO [RepairJobTask:1] 2017-03-30 10:14:00,782 SyncTask.java:73 - [repair #d0f651f6-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.188 and /192.168.0.191 have 1 range(s) out of sync for ad_event_history INFO [RepairJobTask:2] 2017-03-30 10:14:00,782 SyncTask.java:73 - [repair #d0f651f6-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.188 and /192.168.0.189 have 1 range(s) out of sync for ad_event_history INFO [RepairJobTask:4] 2017-03-30 10:14:00,782 SyncTask.java:73 - [repair #d0f651f6-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.189 and /192.168.0.191 have 1 range(s) out of sync for ad_event_history INFO [RepairJobTask:2] 2017-03-30 10:14:03,997 SyncTask.java:73 - [repair #d0fa70a1-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.26 and /192.168.0.189 have 2 range(s) out of sync for ad_event_history INFO [RepairJobTask:1] 2017-03-30 10:14:03,997 SyncTask.java:73 - [repair #d0fa70a1-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.26 and /192.168.0.191 have 2 range(s) out of sync for ad_event_history INFO [RepairJobTask:4] 2017-03-30 10:14:03,997 SyncTask.java:73 - [repair #d0fa70a1-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.189 and /192.168.0.191 have 2 range(s) out of sync for ad_event_history INFO [RepairJobTask:1] 2017-03-30 10:14:05,375 SyncTask.java:73 - [repair #d0fbd033-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.189 and /192.168.0.191 have 1 range(s) out of sync for ad_event_history INFO [RepairJobTask:2] 2017-03-30 10:14:05,375 SyncTask.java:73 - [repair #d0fbd033-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.189 and /192.168.0.190 have 1 range(s) out of sync for ad_event_history INFO [RepairJobTask:4] 2017-03-30 10:14:05,375 SyncTask.java:73 - [repair #d0fbd033-1520-11e7-a443-d9f5b942818e] Endpoints /192.168.0.190 and /192.168.0.191 have 1 range(s) out of sync for ad_event_history we cant see any hints on the systems ... so we thought everything is running smoothly with the writes. do we have to be concerned about the nodes always being out of sync or is this a normal behaviour in a write intensive table (as the tables will never be 100% in sync for the latest inserts)? bg, roland
