Cannot invoke "java.util.concurrent.CompletableFuture.whenComplete(java.util.function.BiConsumer)" because the return value of "com.baidu.bifromq.basecluster.messenger.IMessenger.send(com.baidu.bifromq.basecluster.proto.ClusterMessage, java.net.InetSocketAddress, boolean)" is null

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@781aca6[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@5af5a35[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@d172f11]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@3f84edc[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 29]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@45a874d9[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@3b721cd5[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@3f064f50]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@6c7e305e[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 35]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@2be86c4d[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@75cd9aa[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@21cf278c]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@2cadf419[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 28]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@77f3dd52[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@2a887258[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@647662e1]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@56340c7e[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 7179]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@4a54f18e[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@739d5052[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@d4cc783]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@1152d515[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 49]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@751dabef[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@a511f7e[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f3be0514ef0@478f21a4]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@76eaeffb[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 21]