在将数据中心添加到现有集群时，为什么会出现高负载？

Question

我正在尝试向现有集群添加新的数据中心。我有8个线程机。我将concurrentcompactors设置为1。

如您所见，线程池中没有活动任务，但是以某种方式，我看到服务器的负载为20.00。

消耗这么多CPU的原因是什么？

$ nodetool tpstats


Pool Name                         Active   Pending      Completed   Blocked  All time blocked
ReadStage                              0         0          26171         0                 0
ContinuousPagingStage                  0         0              0         0                 0
MiscStage                              0         0              0         0                 0
CompactionExecutor                     1       159          29300         0                 0
MutationStage                          0         0       15567518         0                 0
GossipStage                            0         0          46812         0                 0
RequestResponseStage                   0         0        5651824         0                 0
ReadRepairStage                        0         0           1762         0                 0
CounterMutationStage                   0         0              0         0                 0
MemtablePostFlush                      0         0           2229         0                 0
ValidationExecutor                     0         0              6         0                 0
MemtableFlushWriter                    0         0           1468         0                 0
ViewMutationStage                      0         0              0         0                 0
CacheCleanupExecutor                   0         0              0         0                 0
MemtableReclaimMemory                  0         0           1468         0                 0
PendingRangeCalculator                 0         0             28         0                 0
AntiCompactionExecutor                 0         0              0         0                 0
SecondaryIndexManagement               0         0              0         0                 0
HintsDispatcher                        0         0              4         0                 0
Native-Transport-Requests              0         0        1678044         0                 0
MigrationStage                         0         0            110         0                 0
PerDiskMemtableFlushWriter_0           0         0           1468         0                 0
Sampler                                0         0              0         0                 0
InternalResponseStage                  0         0            422         0                 0
AntiEntropyStage                       0         0             17         0                 0