org.jgroups.protocols.UDP - 将消息发送到null失败

Question

[hannel,192.168.0.46:40014] 15:08:03,642 - ERROR - org.jgroups.protocols.UDP - failed sending message to null (61 bytes)
java.lang.Exception: dest=/225.1.2.46:30446 (64 bytes)
    at org.jgroups.protocols.UDP._send(UDP.java:333)
    at org.jgroups.protocols.UDP.sendToAllMembers(UDP.java:283)
    at org.jgroups.protocols.TP.doSend(TP.java:1327)
    at org.jgroups.protocols.TP.send(TP.java:1317)
    at org.jgroups.protocols.TP.down(TP.java:1038)
    at org.jgroups.protocols.PING.sendMcastDiscoveryRequest(PING.java:220)
    at org.jgroups.protocols.PING.sendGetMembersRequest(PING.java:214)
    at org.jgroups.protocols.Discovery$PingSenderTask$1.run(Discovery.java:385)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
    at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:280)
    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:135)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:65)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:142)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:166)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
    at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.InterruptedIOException: operation interrupted
    at java.net.PlainDatagramSocketImpl.send(Native Method)
    at java.net.DatagramSocket.send(DatagramSocket.java:612)
    at org.jgroups.protocols.UDP._send(UDP.java:324)
    ... 16 more

这是在服务器上进行负载测试期间发生的.我应该担心吗？除了在日志中获取该消息之外,一切似乎都正常.

Answer 1

响应 matt b，“无法将消息发送到 null”消息具有误导性。真正的问题是 InterruptedIOException。这意味着有人在发送 UDP 的线程上调用了interrupt()。中断很可能是在 JGroups 内生成的。（除非您启动然后停止了 JGroups 通道。）

查看堆栈跟踪，中断的 I/O 来自 Discovery 协议。它试图发现其他集群成员。因此，您的任何消息都不会因该异常而丢失。

我们必须了解更多才能真正解决这个问题。