Java / Spring 应用程序：Tomcat 突然无法再部署答案

【问题标题】：Java / Spring application: Tomcat suddenly not able to deploy anymoreJava / Spring 应用程序：Tomcat 突然无法再部署
【发布时间】：2018-03-26 18:03:31
【问题描述】：

在注意到我的 Web 应用程序不再在生产服务器上运行后，我查看了 tomcat 日志 (catalina.out)：

Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 8000
Mar 26, 2018 7:53:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 7:53:26 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 4624 ms
Mar 26, 2018 7:53:26 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Mar 26, 2018 7:53:26 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52 (Ubuntu)
Mar 26, 2018 7:53:26 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 8000
Mar 26, 2018 7:54:26 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 7:54:26 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2108 ms
Mar 26, 2018 7:54:26 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Mar 26, 2018 7:54:26 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52 (Ubuntu)
Mar 26, 2018 7:54:27 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 8000
Mar 26, 2018 7:55:31 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 7:55:32 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2428 ms
Mar 26, 2018 7:55:32 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Mar 26, 2018 7:55:32 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52 (Ubuntu)
Mar 26, 2018 7:55:32 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 8000
Mar 26, 2018 7:56:36 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 7:56:36 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1873 ms
Mar 26, 2018 7:56:36 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Mar 26, 2018 7:56:36 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52 (Ubuntu)
Mar 26, 2018 7:56:36 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT
Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
Listening for transport dt_socket at address: 8000
Mar 26, 2018 7:57:42 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 7:57:42 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 2534 ms
Mar 26, 2018 7:57:42 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
Mar 26, 2018 7:57:42 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.52 (Ubuntu)
Mar 26, 2018 7:57:42 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /var/lib/tomcat7/webapps/ROOT

部署“循环”以以下消息开始：

Mar 26, 2018 5:00:45 PM org.apache.coyote.AbstractProtocol pause
INFO: Pausing ProtocolHandler ["http-bio-8080"]
Mar 26, 2018 5:00:46 PM org.apache.catalina.core.StandardService stopInternal
INFO: Stopping service Catalina

我多次尝试重新启动 Tomcat 和整个服务器，但均未成功。你能想象这里出了什么问题吗？

【问题讨论】：

查找错误日志...我忘记了tomcat将stderr重定向到哪里。 catalina.out 可能是？

标签： java spring tomcat tomcat7

【解决方案1】：

类似的案例也有报道，解释是Memory Leak。

关于这个提到 PermGen 被忽略的警告，你为什么不使用正确的选项？这可能会解释导致您的问题的内存不足。

Java HotSpot(TM) Client VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0

如果在使用正确的选项 (XX:MaxMetaspaceSize) 后仍然存在此问题，请尝试给它更多内存。尝试了解发生了什么变化，然后您的应用程序将无法运行（数据库中的数据已更改？如何？）。如果您仍要说服自己，请删除该应用程序并启动 Tomcat，而不使用任何 Web 应用程序。

【讨论】：

【解决方案2】：

奇怪... 您可以使用其他服务器运行您的应用程序吗？例如玻璃鱼或码头？我知道它不能回答你的问题，但是如果应用程序与上述服务器一起工作，那么你的 tomcat 就会出现一些问题，但如果它们不能工作，那么你的代码就会出现一些问题。

【讨论】：