卡桑德拉修复失败

Question

Cassandra修复无法在节点1上运行，出现以下错误。我之前错误地并行启动了多个修复会话。我发现有一个错误https://issues.apache.org/jira/browse/CASSANDRA-11824已经解决了同样的情况。但我已经在使用cassandra 3.9，请确认运行nodetool scrub是否是唯一的解决方法？在运行scrub之前，我们需要记住什么注意事项，因为我需要直接在Prod上运行它。

com.google.common.util.concurrent.UncheckedExecutionException: org.apache.cassandra.exceptions.RepairException: [repair #6546ce10-3a70-11ec-9336-394ae1cd743d on test/test_config, [(-1879129450237588992,-1867793788349541955], (-1228457230064908637,-1228389616821781301], (583169750278890460,583583127041100026]]] Validation failed in /10.11.22.123
        at com.google.common.util.concurrent.Futures.wrapAndThrowUnchecked(Futures.java:1525) ~[guava-18.0.jar:na]

在节点2（10.11.22.123）上，

ERROR 17:33:12 Cannot start multiple repair sessions over the same sstables
ERROR 17:33:12 Failed creating a merkle tree for [repair #6546ce10-3a70-11ec-9336-394ae1cd743d on test/test_config, [(-1879129450237588992,-1867793788349541955], (-1228457230064908637,-1228389616821781301], (583169750278890460,583583127041100026]]], /10.11.22.789(node 1) (see log for details)
ERROR 17:33:12 Exception in thread Thread[ValidationExecutor:10,1,main]
java.lang.RuntimeException: Cannot start multiple repair sessions over the same sstables
        at org.apache.cassandra.service.ActiveRepairService$ParentRepairSession.markSSTablesRepairing(ActiveRepairService.java:526) ~[apache-cassandra-3.9.jar:3.9]
        at org.apache.cassandra.db.compaction.CompactionManager.getSSTablesToValidate(CompactionManager.java:1318) ~[apache-cassandra-3.9.jar:3.9]

Answer 1

Nodetool tpstats显示确实有活动的修复作业，但它们实际上没有运行，或者compactionstats没有显示任何正在运行的作业。因此，我只重新启动了修复被卡住的节点，这清理了那些卡住的修复作业，之后我可以运行新的修复。

nodetool tpstats    
Pool Name                    Active   Pending      Completed   Blocked  All time blocked
MutationStage                     0         0      323161614         0                 0
ViewMutationStage                 0         0              0         0                 0
ReadStage                         0         0      339671804         0                 0
RequestResponseStage              0         0      440712393         0                 0
ReadRepairStage                   0         0       13751257         0                 0
CounterMutationStage              0         0              0         0                 0
Repair#3                          1      3525              3         0                 0
.....