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$ScheduledFutureTask@2a66978a[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@4663390b[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@44a680fa]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@96d05f8[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 29]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@64115ab[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@6f6e49c9[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@2eac037b]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@21f5a3e2[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 34]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@440f3609[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@71f8846f[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@22fad227]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@44e76139[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 28]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@4c24b94b[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@7ad84081[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@76bc7380]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@3dd73cc9[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 11642]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@4362a2d2[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@43a7db20[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@76e8b24e]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@53ccbf82[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 45]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@964e33a[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@797f3d6a[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$295/0x00007f79cc4b8af8@697b901e]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@79ebc922[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 30]