Systemd tomcat.service失败，没有错误

Question

我将Tomcat配置为使用CentOS 7.2上的Systemd作为服务运行。我可以毫无问题地启动Tomcat：

sudo systemctl start tomcat

我可以访问闪屏，管理器应用程序，甚至部署应用程序。然后我关闭了Tomcat：

sudo systemctl stop tomcat

我没有看到任何错误。但之后我会检查状态：

sudo systemctl status tomcat

● tomcat.service - Apache Tomcat Web Application Container
   Loaded: loaded (/etc/systemd/system/tomcat.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Sun 2016-10-30 17:27:19 UTC; 2s ago
  Process: 10833 ExecStop=/bin/kill -TERM $MAINPID (code=exited, status=0/SUCCESS)
  Process: 10785 ExecStart=/opt/tomcat/bin/startup.sh (code=exited, status=0/SUCCESS)
 Main PID: 10795 (code=exited, status=143)

Oct 30 17:26:31 java2016 systemd[1]: Starting Apache Tomcat Web Application Container...
Oct 30 17:26:31 java2016 startup.sh[10785]: Existing PID file found during start.
Oct 30 17:26:31 java2016 startup.sh[10785]: Removing/clearing stale PID file.
Oct 30 17:26:31 java2016 systemd[1]: Started Apache Tomcat Web Application Container.
Oct 30 17:27:19 java2016 systemd[1]: Stopping Apache Tomcat Web Application Container...
Oct 30 17:27:19 java2016 systemd[1]: tomcat.service: main process exited, code=exited, status=143/n/a
Oct 30 17:27:19 java2016 systemd[1]: Stopped Apache Tomcat Web Application Container.
Oct 30 17:27:19 java2016 systemd[1]: Unit tomcat.service entered failed state.
Oct 30 17:27:19 java2016 systemd[1]: tomcat.service failed.

这表明kill运行得很好。而且/opt/tomcat/logs/catalina.out也没有显示出任何问题：

30-Oct-2016 17:27:19.268 INFO [Thread-5] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8080"]
30-Oct-2016 17:27:19.324 INFO [Thread-5] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"]
30-Oct-2016 17:27:19.375 INFO [Thread-5] org.apache.catalina.core.StandardService.stopInternal Stopping service Catalina
30-Oct-2016 17:27:19.491 INFO [Thread-5] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["http-nio-8080"]
30-Oct-2016 17:27:19.493 INFO [Thread-5] org.apache.coyote.AbstractProtocol.stop Stopping ProtocolHandler ["ajp-nio-8009"]
30-Oct-2016 17:27:19.494 INFO [Thread-5] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["http-nio-8080"]
30-Oct-2016 17:27:19.495 INFO [Thread-5] org.apache.coyote.AbstractProtocol.destroy Destroying ProtocolHandler ["ajp-nio-8009"]

为什么Systemd认为Tomcat是“失败的”？这和“陈旧的PID文件”消息有关吗？

Answer 1

啊，不要紧；这已经是一般Java应用程序的answered already on serverfault了。

基本上，Java程序在响应SIGTERM而关闭时有时不会返回预期的退出状态。将以下内容添加到tomcat.service文件可解决此问题：

[Service]
SuccessExitStatus=143