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我的java应用程序安装在OpenSUSE 13.2操作系统上,我使用systemd进行进程控制.(systemd版本210)

我想使用systemd-notify来利用systemd看门狗功能.但是,我注意到应用程序重新启动是由于看门狗的超时时间不一致.

使用WatchdogSec = 120,并且应用程序配置为每60秒调用systemd-notify,我观察平均每5到20分钟重新启动一次.

这是进程的(略微编辑的)systemd单元文件:

# Cool systemd service
[Unit]
Description=Something Awesome
After=awesomeparent.service
Requires=awesomeparent.service

[Service]
Type=simple
WorkingDirectory=/opt/awesome
Environment="AWESOME_HOME=/opt/awesome" 
User=awesomeuser
Restart=always
WatchdogSec=120
NotifyAccess=all
ExecStart=/home/awesome/jre1.8.0_05/bin/java -jar awesome.jar

[Install]
WantedBy=multi-user.target

这是调用systemd-notify的代码

String pidStr = ManagementFactory.getRuntimeMXBean().getName();
pidStr = pidStr.split("@")[0];

String cmd = "/usr/bin/systemd-notify";

Process process = new ProcessBuilder(cmd, 
                                    "MAINPID=" + pidStr, 
                                    "WATCHDOG=1").redirectErrorStream(true)
                                                 .start();

int exitCode = 0;
if ((exitCode = process.waitFor()) != 0) {                
    String output = IOUtils.toString(process.getInputStream());
    Log.MAIN_LOG.error("Failed to notify systemd: " + 
                              ((output.isEmpty()) ? "" : " " + output) …