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$ScheduledFutureTask@d172f11[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@941b795[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@5af5a35]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@781aca6[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 28]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@3f064f50[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@30a32b91[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@3b721cd5]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@45a874d9[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 34]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@21cf278c[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@4c397f66[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@75cd9aa]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@2be86c4d[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 24]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@647662e1[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@4e6de16b[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@2a887258]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@77f3dd52[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 8618]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@d4cc783[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@1c18e8b1[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@739d5052]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@4a54f18e[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 49]

Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@478f21a4[Not completed, task = java.util.concurrent.Executors$RunnableAdapter@37077d34[Wrapped task = com.baidu.bifromq.basekv.store.util.AsyncRunner$$Lambda$362/0x00007f86ac515360@a511f7e]] rejected from java.util.concurrent.ScheduledThreadPoolExecutor@751dabef[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 30]