scheduleAtFixedRate(new Runnable() { @Override public void run() { try { samplingInSeconds(); } catch (Throwable ignored) { } } }, 0, 10, TimeUnit.SECONDS); // 省略其他代码 } 原来在创建一个新的 StatsItem 的时候，就会启动一个定时任务，每隔 brokerController.getSendThreadPool Queue().size())); } } else { break; } } else { break; } } catch (Throwable ignored) { } } 可以看出来，抛出这种错误，在 broker 还没有发送“严重”的 pagecache 繁忙， 即消息追加到内存中的最大时延没有超过 1s，通常追加是很快的，绝大部分都会低于 sendResult = producer.send(msg); System.out.printf("%s%n", sendResult); producer.shutdown(); } catch (Throwable e) { e.printStackTrace(); } } } 本文来自『中间件兴趣圈』公众号，仅作技术交流，未授权任何商业行为。 1.14 RocketMQ msgId 与 offsetMsgId

for(Server s : upServerList) { if(..) { newServers.add(s); } } return newServers; } catch (Throwable t) { t.printStackTrace(); throw t; } return upServerList; } 字节码增强 Java Agent

channel.waitFor(ClientChannel.CLOSED, 0); } catch (Throwable t) { t.printStackTrace(); System.exit(1); } finally { try { client.stop(); } catch (Throwable t) { } } System.exit(0); } } TO THE MANAGEMENT

calls Int exception The session exception, such as the exception that occur when opening session Throwable eventType The type of session event String KyuubiOperationEvent Name Description Type statementId operation Long completeTime Time time the query ends Long exception Caught exception if have Throwable sessionId The identifier of the parent session String sessionUser The authenticated client user

calls Int exception The session exception, such as the exception that occur when opening session Throwable eventType The type of session event String KyuubiOperationEvent Name Description Type statementId operation Long completeTime Time time the query ends Long exception Caught exception if have Throwable sessionId The identifier of the parent session String sessionUser The authenticated client user

channel.waitFor(ClientChannel.CLOSED, 0); } catch (Throwable t) { t.printStackTrace(); System.exit(1); } finally { try { client.stop(); } catch (Throwable t) { } } System.exit(0); } } The following