草庐IT

java - Cassandra NoHostAvailableException : All host(s) tried for query failed in Production

我们有10个运行Cassandra-2.1.8的Cassandra节点。我们最近升级到2.1.8版本。以前我们只使用3个运行Cassandra-2.1.2的节点。首先,我们将最初的3个节点从2.1.2升级到2.1.8(遵循UpgradingCassandra中描述的过程)。然后我们在集群中添加了7个运行Cassandra-2.1.8的节点。然后我们开始了我们的客户端程序。最初几个小时一切正常,但几个小时后,我们在客户端程序日志中看到一些错误,例如Thread-0[29/07/1517:41:23.356]ERRORcom.cleartrail.entityprofiling.engin

Jenkins构建流水线SSH连接Git错误:Host key verification failed 报错问题

报错信息:无法连接仓库:Command"gitls-remote-h--git@ip:xxx/xxx.gitHEAD"returnedstatuscode128:stdout:stderr:NoED25519hostkeyisknownforandyouhaverequestedstrictchecking.Hostkeyverificationfailed.fatal:Couldnotreadfromremoterepository.Pleasemakesureyouhavethecorrectaccessrightsandtherepositoryexists.问题解释:主要是因为主机密钥

java - Spring DeferredResult 导致 IOException : An established connection was aborted by the software in your host machine

我正在尝试使用Spring的DeferredResult来执行长轮询。在此示例中,一个用户访问一个使用长轮询等待另一个用户单击链接的页面。然后第二个用户(您在另一个浏览器中)点击该链接,长轮询返回给第一个用户,通知她第二个用户的点击。jsp看起来像这样:SpringExamplefunctionpollContent(){$.ajax({url:"waitForClick",success:function(result){console.log("Polledresult:"+result);$("#polledContent").html(result);pollContent()

vscode连接docker报错:The remote host may not meet VS Code Server‘s prerequisites for glibc and libstdc+

1.环境介绍:1)docker系统境:ubuntu18.04;2)vscode:1.86版本2.连接方式:ssh连接3.报错:TheremotehostmaynotmeetVSCodeServer‘sprerequisitesforglibcandlibstdc+4.分析:vscode的升级到1.86版本之后,其对于ubuntu中 glibc和libstdc+版本需求更高,容易出现连接不上的问题,其在vscode界面会提示:TheremotehostmaynotmeetVSCodeServer‘sprerequisitesforglibcandlibstdc+5.解决:1)重新下载vscode

java - Spring 启动 MailConnectException : Couldn't connect to host, 端口 : localhost, 25;超时-1;

IknowmassivenumberofquestionsisaskedintheContextofthisMailConnectException,butmyissueisbitdifferent我遇到了SpringbootApp的奇怪行为,下面提供的代码让我解释了两个场景:STMP设置spring.mail.default-encoding=UTF-8spring.mail.host=smtp.mailtrap.iospring.mail.username=2fcc984a833f26spring.mail.password=notMypasswordspring.mail.por

vscode报错 “The remote host may not meet VS Code Server‘s prerequisites for glibc and libstdc++” 解决方法

报错信息:TheremotehostmaynotmeetVSCodeServer’sprerequisitesforglibcandlibstdc++报错原因:由于vscode自动更新版本为vscode1.86(没更新前的版本为1.85.2),该新版本更新了对glibc的要求,需要最低2.28版本,导致各种旧版本的linux发行版(比如最常见的centos7)都无法用remote-ssh来连接了,会一直控制台报错waitingforserverlog。解决方法:1、回退版本到1.85.2,同时永久禁用更新,但这样本地开发的时候也不能使用vscode的最新特性了,不推荐2、使用1.85.2的po

java - 我应该如何解决 java.lang.IllegalArgumentException : protocol = https host = null Exception?

我正在开发一个SSL客户端服务器程序,我必须重用以下方法。privatebooleanpostMessage(Stringmessage){try{StringserverURLS=getRecipientURL(message);serverURLS="https:\\\\abc.my.domain.com:55555\\update";if(serverURLS!=null){serverURL=newURL(serverURLS);}HttpsURLConnectionconn=(HttpsURLConnection)serverURL.openConnection();conn

java - 发送邮件错误,javax.mail.MessagingException : Could not connect to SMTP host: localhost, port: 25;

这是我的代码importjava.util.Properties;importjavax.mail.Message;importjavax.mail.MessagingException;importjavax.mail.Session;importjavax.mail.Transport;importjavax.mail.internet.InternetAddress;importjavax.mail.internet.MimeMessage;publicclassMailSendClass{publicstaticvoidmain(String[]args){//Recipien

java - 获取 "java.io.IOException: An existing connection was forcibly closed by the remote host"

我正在对IBMCloudBPM进行休息调用。有时调用工作正常。但有时会出现以下错误。java.io.IOException:Anexistingconnectionwasforciblyclosedbytheremotehost.java.io.IOException:Anexistingconnectionwasforciblyclosedbytheremotehostatsun.nio.ch.SocketDispatcher.read0(NativeMethod)atsun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)

Java - DefaultHttpClient 和 "Host" header [Apache HttpComponent]

我正在通过DefaultHttpClient提交多个HTTP请求。问题是“主机”header从未在请求​​中设置。例如通过执行以下GET请求:HttpUriRequestrequest=newHttpGet("http://www.myapp.com");org.apache.http.client.HttpClientclient=newDefaultHttpClient();HttpResponsehttpResponse=client.execute(request);生成的请求对象没有设置强制性的“主机”header值:Host:myapp.com有什么建议吗?